May 7th, 2009, 05:17 PM | #41 |
ninjette.org member
Name: HzrnBgy
Location: Hawaii
Join Date: Apr 2009 Motorcycle(s): 2009 Black Ninja 250R, 2004 Yellow Ninja 250R Posts: 111
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the sucker finally succumed to the mighty power of an impact wrench
took it less than 5 seconds the one ive been trying for almost 15 hrs now (cumulative) oh well... thanks guys |
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May 8th, 2009, 03:54 AM | #42 |
ninjette.org certified postwhore
Name: Joe
Location: Buffalo NY
Join Date: Jan 2009 Motorcycle(s): 08 Ninja 250 "Wasabi", 82 Yamaha xj650j Posts: A lot.
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Wow..had to go impact wrench. yikes
I think I need to do what kkim does and give every nut and bolt a once over with a torque wrench. I think my front axle is way to tight. BTW: can someone give me a link to a 15T front sprocket that doesnt need shimming? please.
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September 24th, 2009, 06:08 PM | #43 |
ninjette.org guru
Name: dawn
Location: portland, or
Join Date: Sep 2009 Motorcycle(s): 08 ninja 250r modded, 73 honda cl200, 74 kawasaki 400 triple Posts: 255
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everything i have been able to find on the subject of sprocket change everyone is doing 15 in front and either leaving the rear alone or going smaller....after going nuts trying to decide...since i really don't understand how or why with the gear ratio works...i ordered 13/47 i would like to be able to pull out into traffic faster...has anyone done this???
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September 24th, 2009, 07:27 PM | #44 | |
VooDooMaster
Name: Dave
Location: tucson
Join Date: Feb 2009 Motorcycle(s): 2008 Blue EX250, 2007 Yamaha Virago 250 Posts: 173
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Quote:
That sprocket change should do the job!
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VooDooMaster I love the smell of Blue Octane in the morning..... |
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September 24th, 2009, 10:46 PM | #45 |
ninjette.org dude
Name: 1 guess :-)
Location: SF Bay Area
Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much.
Blog Entries: 7
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Check out the gearing commander site where you can put in the stock 2008 Ninjette, and play with the ratios to see how things will change. With a 13/47 setup, the engine will be turning 10,000 rpm in top gear at about 72 mph, and will hit redline in top gear at less than 90 mph. Most folks tend to change the gearing to something taller on the ninjette to smooth out the highway ride (by lowering revs); it's rarer to go shorter as you're suggesting (which will increase revs).
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January 11th, 2010, 04:25 PM | #46 |
ninjette.org member
Name: Jessy
Location: Orlando
Join Date: Jan 2010 Motorcycle(s): 2009 Kawasaki Ninja 250r Posts: 19
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Does this apply to 09 250r?
Lovely DIY, wondering if it applies to an 09 250r. Looking to do my front sprocket to a 15, not gonna touch the rear cause i dont have any stands for it.
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JBo, time to roll! |
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January 11th, 2010, 04:26 PM | #47 |
Join Date: Nov 2008 Posts: Too much.
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February 21st, 2010, 01:55 PM | #48 |
ninjette.org certified postwhore
Name: eddie
Location: Lawnguylind
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A possible addition to pp2 of this excellent DIY:
To fully remove the shift link rod / clamp from the rod that enters the engine, you MAY have to loosen the silver hex bolt immediately to the rear of the assembly. This is the bolt that holds both the shift lever and link rod to the engine case. I had to back mine off 1 1/4 turns. |
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May 28th, 2010, 04:00 PM | #49 |
Over 40 Ninjette Owner
Name: John
Location: Lancaster, Pa
Join Date: May 2010 Motorcycle(s): 2008 Kawasaki VN900C (Black)/2009 Kawasaki Ninja 250R (Red) SOLD BOTH Posts: 77
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@Alex:
The gearing commander saved me from hunting for the calculator! Thanx. I just bought a 41 tooth rear ($41.99), must get stands first. Already got a torque wrench, impact driver, metric sockets (deepwell), and threadlocker (blue). @Ninjette.org: Any recommendations for axle lube? What about the chain? Stock OK, or do you recommend aftermarket? Mine has 1800 miles on it, have cleaned it once, lubed twice. Thanx for any help! Johnny |
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May 28th, 2010, 04:06 PM | #50 | |
Join Date: Nov 2008 Posts: Too much.
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Quote:
stock chain is okay as long as you take care of it. at your rate, you are under maintaining your chain. check your owner's manual for cleaning/adjusting intervals. I use wd-40 or kerosene to clean, maxima chain wax to lubricate. I've also started using dupont teflon spray as a lubricant, too. |
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June 17th, 2010, 04:51 AM | #51 |
ninjette.org member
Name: Michael
Location: BG, KY
Join Date: Jun 2010 Motorcycle(s): Bodyless Ninja, 1986 Yamaha Towny, 1988 Honda Spree Posts: 40
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I've actually wondered much of this about gear ratio on motorcycles and always decided that shift patterns really determine your gas mileage. Riding CVT Scooters(ranging from 25-150) you can really tell a difference in acceleration and top speed(woohoo 50mph;(] when changing variators, roller weights, and springs. But being a CVT bike I've never really been able to control my shift pattern.
I've also thought about what a street bike would be like with a CVT setup.... just googled and obviously its been a few years since I've thought of this so here are actually some CVT motorcycles, an aprilla, a honda, a ridley(some company in Oklahoma?) and Dutch E.V.A.(actually a pretty interesting bike) At any rate gas mileage can be simplified by how much gas you burn in a given time(which for most is in correspondence to a distance). You don't generally refer to a trip somewhere in how long it will take when talking about gas usage. btw, I know this thread is old(playing catchup), I'm new however and just thought I'd give a mention of what I didn't see people mention. If you are going to ride a distance of 10miles and you plan on riding this distance @ 60mph. For Instance A. You give it full throttle asap you will burn a decent amount of gas. Obviously because you are displacing a lot of gas from your gas tank out to your muffler in trade for that nice boost of speed. This is where time comes into play, you were sitting @ 0mph and it will literally take you seconds to reach 60mph. Thereafter you will cruise the rest of your ten mile trip(assuming no stops) in a decent time. For Instance B. You are lenient on the throttle and accelerate slower than normal taking your time to reach 60mph. Obviously going slower you will travel a much longer distance for more for a longer period of time before achieving sweet 60. This ends up meaning your overall trip time will be longer all the while traveling the same length. All in all it seems equal to me, not really to comparable either, I tested this with my 08 mustang. POS never got great gas mileage for obvious reasons, however, it did give a readout as far as mpg that were being achieved which was entirely accurate. By calculation of odometer reading and current gas tank fill at time car was started it would deviate a rather disgusting number at times. As a side note I did find out you could cheat and fill the tank up while it was still running(obviously not safe , but it only happened twice to confirm the readings). At any rate, I put 30k miles in the first year and mostly city with moderate traffic so I felt the burn. I tested out gas mileage by resetting the meter at rest and accelerating at tire squelching force and maintaining 45mph and counting the next green light as a marker. At first within the window of acceleration I "blipped" by using 8-12mpg(such a waste) for about 4 seconds and finished the distance in a rather timely manner. This worked well as I drove back and forth across town through many of the same intersections just for the sake of testing, right? I then would reset the counter and tested gas mileage with granny acceleration of 0-45 which was in the range of about 40seconds. Obviously I got my 20mpg out of it but it took me nearly a minute of gas burning to get a fraction of the distance. Maybe you can say you saved some gas in the comparing how much was used in acceleration, however when it came to distance/time I was burning a comparable amount of gas. I'd also imagine this would be equivalent to a motorcycle. So I guess this run on rant on a dead thread has gone on much to long, then again what else better am I doing at work?... P.S. Kudos to you if you are reading this. |
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June 17th, 2010, 06:00 PM | #52 |
ninjette.org certified postwhore
Name: Scott
Location: Carlise Ohio
Join Date: Apr 2010 Motorcycle(s): Yahama v star 650 classic Posts: A lot.
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Hey, where did you buy your sprockets at? This was a good DIY thread!
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June 17th, 2010, 08:26 PM | #53 | |
ninjette.org member
Name: Michael
Location: BG, KY
Join Date: Jun 2010 Motorcycle(s): Bodyless Ninja, 1986 Yamaha Towny, 1988 Honda Spree Posts: 40
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Quote:
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June 18th, 2010, 02:28 AM | #54 |
ninjette.org certified postwhore
Name: Scott
Location: Carlise Ohio
Join Date: Apr 2010 Motorcycle(s): Yahama v star 650 classic Posts: A lot.
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Cool! Thanks!
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July 25th, 2010, 05:50 PM | #55 |
ninjette.org sage
Name: patricK
Location: San Jose, CA--BAY AREA!
Join Date: Mar 2009 Motorcycle(s): '08 blue 250R [sold]. '09 lime ZX-6R [stolen :( ]. '06 blue 636. Posts: 918
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thinking of going 15T front. does anyone know if the stock chain will fit ok, or is it necessary to get a new one?
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July 26th, 2010, 05:01 AM | #56 | |
ninjette.org member
Name: Chris
Location: N. Central Ill.
Join Date: Apr 2010 Motorcycle(s): '09 Ninja 250R (hers), '06 Buell XB12Ss (mine) Posts: 28
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Quote:
Just make sure you have a 27mm impact socket and a stout 1/2" drive impact wrench. We went out riding last evening and she gave me a big on the switch. I've not ridden it yet, but I did with the stock gearing and I thought it was just stupid under-geared. Granted, it's a polar opposite to my Buell, but first gear on the Ninja was like the granny gear on old Ford pickup. Chris |
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July 26th, 2010, 03:43 PM | #57 |
ninjette.org sage
Name: patricK
Location: San Jose, CA--BAY AREA!
Join Date: Mar 2009 Motorcycle(s): '08 blue 250R [sold]. '09 lime ZX-6R [stolen :( ]. '06 blue 636. Posts: 918
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Thanks for the report, Chris.
May I ask, where you purchased the sprocket? possible link perhaps? |
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July 27th, 2010, 05:22 AM | #58 | |
ninjette.org member
Name: Chris
Location: N. Central Ill.
Join Date: Apr 2010 Motorcycle(s): '09 Ninja 250R (hers), '06 Buell XB12Ss (mine) Posts: 28
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Quote:
[EDIT]: Here's the link: Drive Systems USA Last futzed with by europachris; July 27th, 2010 at 07:08 PM. Reason: Added link |
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August 2nd, 2010, 06:09 AM | #59 |
ninjette.org member
Name: Chris
Location: N. Central Ill.
Join Date: Apr 2010 Motorcycle(s): '09 Ninja 250R (hers), '06 Buell XB12Ss (mine) Posts: 28
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Took her bike out for a spin on Saturday. I must agree with her wholeheartedly - !!!!
IMHO, it's where the bike should have been geared from the factory. It's a street bike, not a trials bike. It settles into a groove right about 60mph and ~7700rpm and it feels "happy". Acceleration isn't quite as snappy, but overall I think it's a wash because you don't have to shift like a trucker with a 13 speed Road Ranger who's in 6th by the end of the intersection. I think the swap makes the bike a lot more friendly for the "average" rider looking for a more relaxed, longer distance bike. I don't think I would want to ride it on the expressway for hours on end at 75mph, the seat is too hard for my bum, but the bike would certainly handle it. I can't help from getting a big grin every time I ride it - it's amazing how well it handles for such a basic bike. I can't come up with a good enough excuse to buy one and also keep my Buell, unfortunately. Chris |
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November 14th, 2010, 10:32 AM | #60 |
ninjette.org member
Name: DJ
Location: DFW, TX
Join Date: Sep 2010 Motorcycle(s): TR7, Trident, SuperIII, BMW, HD, Duc, Vespa, MP3 Posts: 83
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November 14th, 2010, 11:03 AM | #61 | |
ninjette.org member
Name: DJ
Location: DFW, TX
Join Date: Sep 2010 Motorcycle(s): TR7, Trident, SuperIII, BMW, HD, Duc, Vespa, MP3 Posts: 83
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Quote:
I did the swap but could never get the nut to budge with a breaker bar. I had to resort to an electric impact wrench (2x4 through the wheel not required) on the sprocket nut and the rear axle nut to adjust the chain. An impact wrench removes these buggers in about 3 seconds. http://www.ridegear.com/detail.cfm?m...2&related=long Random link, the picture is not correct, but this is what it looks like. Last futzed with by red; November 16th, 2010 at 08:32 PM. |
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November 15th, 2010, 06:36 AM | #62 |
Over 40 Ninjette Owner
Name: John
Location: Lancaster, Pa
Join Date: May 2010 Motorcycle(s): 2008 Kawasaki VN900C (Black)/2009 Kawasaki Ninja 250R (Red) SOLD BOTH Posts: 77
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Howday All:
I had the 41 tooth rear sprocket installed along with a 2 Bros Racing slip on (kinda tired of people not hearing me and merging with traffic). The 41 tooth has been so far remarkable. Stock, the bike would turn about 5000rpm @ 45mph in 6th gear, now it goes about 50mph (indicated) in 6th at 5k rpm. Highway speeds (65+) are more relaxed, even with the bark from the new lungs! Johnny
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So Long, and Thanks for All The Fish! Vulcan 900 Custom: Cafe windscreen, OEM backrest and Lockable side cases!!! |
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December 24th, 2010, 10:41 PM | #63 |
ninjette.org member
Name: dave
Location: minneapolis
Join Date: Nov 2010 Motorcycle(s): 2009 blue ex 250 ninja and 2012 Metallic troll snot green,3)Honda GL1000,XR400R,Suzuki Dr200 Posts: 43
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An air wrench with an impact socket makes the take off a real breeze.
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February 12th, 2011, 03:02 PM | #64 |
ninjette.org member
Name: Dave
Location: DFW, US
Join Date: Mar 2010 Motorcycle(s): 2008 Ninja TwoFiddy Posts: 164
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Good write up. Some additional information should be added in the original post like needing a 27mm socket to remove the front sprocket, etc.
QUESTION: I removed my OEM 14 tooth sprocket and will be replacing it with JTS 15 tooth sprocket a noticed it has a rubber washer on each side. Do I need remove these and place them on the new sprocket? JTF515.15 PN: 80-985-15 EDIT: Don't need the rubber and for sprocket (JTF515.15). I need to add shim (spacer) http://www.ninjette.org/forums/showp...6&postcount=42 Thanks everyone. Last futzed with by FerociousNINJA; February 12th, 2011 at 06:05 PM. |
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March 6th, 2011, 10:14 PM | #65 |
ninjette.org certified postwhore
Name: eddie
Location: Lawnguylind
Join Date: Nov 2009 Motorcycle(s): 300, WeeStrom Posts: A lot.
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sprocket swap top speed
Common sense suggests that a taller gear will make the bike go faster. As it was brought up by Alex, I believe...it doesnt work that way on these ninjettes.
I went to a 16/41 and finally had the chance to run as fast as i could over some distance, maybe 3-4 miles giving plenty of time for the bike to do its best. Indicated speed in 5th was 100+ and it got right up to speed. Indicated speed in 6th was 100+ and it took maybe a minute to get there. In both...I had a strong head wind. But the good news is that I can run at 80+ and the engine just sits above 8k. At this point, got 119 mi out of 2.3 gallons running at 70-80 all the way. Soooo pleased with this simple mod. |
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March 6th, 2011, 10:26 PM | #66 | |
ninjette.org Monkey Spank
Name: Kevin
Location: Illinois
Join Date: Apr 2009 Motorcycle(s): 2008 250R Track-Bike Woodcraft clip-ons and rearsets FZ-6 track bike Posts: A lot.
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Quote:
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Black 250R Full Area P QC Dyno Jet Kit 100 main 41T Rear Sprocket |
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March 7th, 2011, 08:09 AM | #67 |
ninjette.org certified postwhore
Name: eddie
Location: Lawnguylind
Join Date: Nov 2009 Motorcycle(s): 300, WeeStrom Posts: A lot.
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I posted it becasue it's a pretty good illustration of what Alex brought up...top speed is based on the work it takes to move a bike and not the way you gear it. Yes, you're right...the gears are a little tall for street work but...ya gotta understand....I have to travel miles and miles to get to the playground...even a little 200 mile saturday spends maybe 150 miles on parkways. Jetting and stuff is more than this noob mechanic wants to attempt. At this point...anything more complicated than turning a wrench and getting the screw to go back into the hole it came from is beyond me.
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March 7th, 2011, 09:50 AM | #68 |
ninjette.org member
Name: dave
Location: minneapolis
Join Date: Nov 2010 Motorcycle(s): 2009 blue ex 250 ninja and 2012 Metallic troll snot green,3)Honda GL1000,XR400R,Suzuki Dr200 Posts: 43
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When I ordered the larger counter shaft sprocket I also ordered a new lock washer for the nut. Since my sprocket choice needed to be shimmed I simply put the old lock washer on the drive shaft on the other side of the sprocket and used it for the spacer/shim.
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March 7th, 2011, 11:32 AM | #69 | |
ninjette.org Monkey Spank
Name: Kevin
Location: Illinois
Join Date: Apr 2009 Motorcycle(s): 2008 250R Track-Bike Woodcraft clip-ons and rearsets FZ-6 track bike Posts: A lot.
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Quote:
Your good for mileage with your set up. No doubt. DONT be afraid to jet the bike. Follow the step by step instuctions in the DIY its a breeze. Check out the jetting database Its full of info on the proper jets for your area, altitude etc. That is if your willing of course. OTHERWISE enjoy your MPG gains. God knows your gona need them with these gas prices. Besides if you want to go fast you can always strap on your FZ-6.
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Black 250R Full Area P QC Dyno Jet Kit 100 main 41T Rear Sprocket |
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March 7th, 2011, 05:57 PM | #70 |
Ninjette CPT
Name: Vince
Location: jacksonville, fl
Join Date: May 2009 Motorcycle(s): Black 08 250r Posts: A lot.
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great source for sprockets and chains:
www.sprocketcenter.com or www.rockymountainatvmc.com also, both sites offer free shipping for orders over $100 |
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March 8th, 2011, 10:54 AM | #71 |
ModMy250.com
Name: Tri
Location: St, Louis
Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.
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I just got my Driven sprocket from Fatbikez.com. http://fatbikez.com/driven-kawasaki-...520-chain.html for $22.99 shipped after the "ship4free" coupon code. The Driven sprocket is advertised as lighter than the oem one. I need to weigh the oem one when I remove it. I weighed the driven sprocket on our shipping scale and it came up at 6 oz. Too bad our scale isn't accurate to a decimal point in ounces.
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March 9th, 2011, 09:29 AM | #72 |
ModMy250.com
Name: Tri
Location: St, Louis
Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.
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Well, I got my Driven sprocket on last night. It took a 4' cheater bar and a 2x4. When I heard a loud crack, I thought my 2x4 had just snapped. My impact gun didn't do anything to it. It was crazy tight.
I got a chance to weigh the oem one with the rubber still attached to it. On the same scale as the one I used before, it actually comes up slightly lighter than the Driven sprocket. Maybe I was wrong and they advertised it to be light weight, but not compared to the oem sprocket. Maybe compared to the other aftermarket sprockets? The oem sprocket with rubber weighed in at 6 oz, just like the Driven one, but when I switched to lbs, it read .3 whereas the Driven read .4. I let it sit there to see if the weight would change, but it didn't. I wonder how heavy the JT one is? As far as weight is concerned, I'm glad the Driven one is comparable to the stock one. One question though, was it ok for me to not reinstall the rubber pieces onto the new sprocket? It seems like they're designed to be dampeners.
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April 6th, 2011, 10:38 AM | #73 |
ModMy250.com
Name: Tri
Location: St, Louis
Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.
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Finally got my rear 43T Superlite Black 520 Driven sprocket in. I put it on the same scale I used for the 15T front and it reads 1.5 lbs. When I get the oem rear sprocket off, I'll weight that as well.
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The www.ModMy250.com guy |
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April 11th, 2011, 07:39 AM | #74 |
ninjette.org member
Name: DJ
Location: DFW, TX
Join Date: Sep 2010 Motorcycle(s): TR7, Trident, SuperIII, BMW, HD, Duc, Vespa, MP3 Posts: 83
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I put a 15T on last year and like it, the rear is the stock sprocket.
How small can I go on a rear sprocket using the stock chain and the 15T front? Thanks.
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2010 Ninja 250R SE - I got this bike for my wife. It was a good trade. |
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April 11th, 2011, 08:18 AM | #75 |
ModMy250.com
Name: Tri
Location: St, Louis
Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.
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I just put on a 43T with my 15T front and it dropped the RPM's by a lot on the freeway. So much so that I now have to down shift if I need to pass someone. I kinda like it. I believe people have gone down to a 41 before.
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April 11th, 2011, 10:24 AM | #76 |
Motorcyclist
Name: James
Location: Maryland
Join Date: May 2010 Motorcycle(s): 2014 Ninja 300 ABS Posts: A lot.
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April 13th, 2011, 04:15 PM | #77 |
ModMy250.com
Name: Tri
Location: St, Louis
Join Date: Sep 2010 Motorcycle(s): 2009 Ninja 250R, 2005 R6 Posts: A lot.
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Just to update, the stock sprocket weighed 2.2lbs on my scale. That's 0.7 lbs heavier than the Driven sprocket I installed. Nice amount of weight savings in rotational mass and it's still steel.
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The www.ModMy250.com guy |
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April 16th, 2011, 12:53 PM | #78 |
ninjette.org member
Name: DJ
Location: DFW, TX
Join Date: Sep 2010 Motorcycle(s): TR7, Trident, SuperIII, BMW, HD, Duc, Vespa, MP3 Posts: 83
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I got around to putting on a 43T Renthal rear sprocket 210U-520-43P-HA after sorting out the strangled flat spot in the carbs, thanks to Kelly and others. I had put a 15T front on last fall, but the poor running down low made taller gearing seem not the way to go until that was solved.
Now that the bike is running flawlessly, probably like it *should* have come from the factory, the 43T rear went on today and the taller gearing makes the little Ninja start to feel like larger (more normal) bike gearing to me. I probably could even have gone to a 41T and been even happier, but this it for a while it for a while. Pulling the rear nuts, axle, and countershaft nut is a really good excuse to buy a cheap HF electric impact wrench and reduces coaxing nuts to a 2 second battle. Thanks to everyone for the info on the forum.
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2010 Ninja 250R SE - I got this bike for my wife. It was a good trade. |
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May 2nd, 2011, 09:46 AM | #79 |
ninjette.org member
Name: Andy
Location: Oregon
Join Date: May 2010 Motorcycle(s): '08 Kawasaki Ninja 250R, '09 Kawasaki Ninja ZX6R, '81 KZ440 LTD Posts: 14
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Count me as a happy 15t front-sprocket convert. I was replacing & shimming my cush drive, and took the opportunity to try the 15t front sprocket.
I purchased the JTF1539.15 I found from a seller on Amazon. I could not get the factory-torqued sprocket nut to budge with the tools I had, and darned near snapped a piece of wood I had placed through the rear rim. I wheeled the bike 2 houses over to my neighbor's and used his air impact wrench. A few seconds later the nut was off, and I didn't hurt myself nor the bike. I fussed a bit getting the chain remounted, but I'm sure there's a knack to doing it that I hadn't learned. I'm 200+ lbs with gear on, have 150/60/17 & 120/70/17 BT-016's mounted, and I'd say the gearing & ride quality is just about dead-on for me and areas where I ride. In 6th gear, I see an indicated 10mph per 1000 RPM on the tach, like others. 60 MPH is a sweet and smooth purr at 6000 RPM. Thanks you all that take to the time to write-up these great DIY's and share what they've learned. |
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May 3rd, 2011, 05:22 PM | #80 |
ninjette.org member
Name: dave
Location: minneapolis
Join Date: Nov 2010 Motorcycle(s): 2009 blue ex 250 ninja and 2012 Metallic troll snot green,3)Honda GL1000,XR400R,Suzuki Dr200 Posts: 43
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LOVE the 15/41 set up and I weigh 215 lbs. Can't wait to put a 130 tire on the back . Mileage update later.
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