May 20th, 2011, 09:01 AM | #81 |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Bought my second JTF1539.15 but not sure how I'm going to install it. I simply don't have the tools.
|
|
May 21st, 2011, 12:51 AM | #82 |
ninjette.org member
Name: Jason
Location: McMinnville Oregon
Join Date: May 2011 Motorcycle(s): 2008 kawasaki ninja 250r Posts: 20
|
lowering front sprocket
Ok I just changed my set up on a 2008' from a stock 14/45 to a 13/45 all aluminum instead of stock steel. I adjusted the fuel mixture to were the bike idles at 1600 rpm now fully warmed up. Its the best mod I've done. My friend has the same bike and is having lots of trouble keeping up with me from 0 to 80 mph. My bike beats his now in every aspect when riding, and im not show boating its true. No loss of top speed, stronger low and mid range, smoother and the power band seems to carry all the way to read line. Shifts are a little quick but that's because your getting to mph quicker. Without the fuel mixture adjustment this is not a good mod. Again this was my best mod ever! Throw in upgraded headers, muffler, k&n atv air filters with no air box, and #30 dino jet kit and you got yourself a screaming 250r with wings. Oh did I mention I know nothing about gear ratios ;+)
|
|
July 3rd, 2011, 12:14 AM | #83 |
ninjette.org certified postwhore
Name: Brian
Location: Detroit, MI
Join Date: Jun 2010 Motorcycle(s): 2009 Ninja 250R Green Posts: A lot.
|
Just wanted to mention that I think the picture has the front sprocket facing the wrong way. The JT label and Lip should be facing the engine. Confused me for a while.
|
|
July 5th, 2011, 12:27 AM | #84 | |
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.
|
Quote:
__________________________________________________
|
|
|
July 20th, 2011, 02:40 PM | #85 | |
ninjette.org member
Name: Canada
Location: canada
Join Date: Jul 2011 Motorcycle(s): 250 Posts: 18
|
Quote:
|
|
|
July 23rd, 2011, 04:59 PM | #86 |
ninjette.org sage
Name: Joseph
Location: Winter Park, FL
Join Date: May 2011 Motorcycle(s): 2011 250R Black, 2005 ZX-6R Blue Posts: 623
|
Feck me. Now I have to take it all apart and flip my sprocket. I am pretty surprised that DIY was wrong for 3 years.
|
|
July 23rd, 2011, 05:14 PM | #87 |
ninjette.org sage
Name: Joseph
Location: Winter Park, FL
Join Date: May 2011 Motorcycle(s): 2011 250R Black, 2005 ZX-6R Blue Posts: 623
|
|
|
August 9th, 2011, 09:26 PM | #88 |
ninjette.org guru
Name: andy
Location: san gabriel
Join Date: Jan 2010 Motorcycle(s): 2007 Ninja 250 faster red Posts: 397
|
and also interesting;y, that front sprocket in the original post is for the pre-gen. Pre-gen is JTF-516, the new gen is JTF-1539. The Pre-gen front sprocket in theory should fit the current gen bike, but definitely NOT VICE VERSA.
|
|
August 11th, 2011, 06:16 AM | #89 |
ninjette.org member
Name: Ross
Location: NoVA
Join Date: Jul 2011 Motorcycle(s): '09 250R Posts: 214
|
How much am I supposed to pay if I let a dealer do this for me (ballpark figure) for the front sprocket change?
|
|
August 11th, 2011, 08:33 PM | #90 |
ninjette.org certified postwhore
Name: Paul
Location: Roanoke, VA
Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.
|
Shouldn't take an experienced motorcycle mechanic more than an hour, two at the maximum, including them loosening and re-aligning your rear tire, checking chain slack afterward. Assume hourly rate of ~$70-80/hr, so I'd say $160 MAX.
I found out this can be done without taking off the chain, if you're stubborn about it and very careful. That said, I had a HELL of a time breaking that nut loose to replace my 15T once the teeth started to hook after some 17,000mi. Duckman, I honestly don't know how you did that. I had a 6' breaker bar going, putting all of my ~150lbs on the rear brake pedal and it still wouldn't budge. Even tried a penetrating lubricant and some modest heat as options. Instead, the chain would (essentially) stretch and allow me to rotate the countersprocket around with the nut through ~80 degrees of rotation. I finally resorted to just putting a 2x4 thru the rear wheel and doing it that way.
__________________________________________________
Proud member of the Blue Army |
|
August 29th, 2011, 10:04 AM | #91 |
ninjette.org member
Name: Canada
Location: Duncan, B.C. Canada
Join Date: Jul 2011 Motorcycle(s): 2010 Ninja 250r Posts: 80
|
Lettering goes in or out? My 15 tooth sprocket just showed up today. Some people say Lettering/spacer thing in, some say out. I see you put yours out.
Edit never mind, actually did some reading. Lettering in.
__________________________________________________
2010 Ninja 250 Danmoto Carbon Slip On,Factory Pro Jet Kit,K&N R-0990 Air Filter,10000K HID's,Carbon Fiber Shogun No Cut Frame Sliders & Swingarm Spools,SSR Lowering Links and more.... |
|
August 29th, 2011, 10:12 AM | #92 | |
ninjette.org member
Name: Canada
Location: Duncan, B.C. Canada
Join Date: Jul 2011 Motorcycle(s): 2010 Ninja 250r Posts: 80
|
Quote:
http://www.bikebandit.com/jt-sprocke...62158&t=1&td=1 second one down. Is this wrong, I know it will work but is there a new gen one?
__________________________________________________
2010 Ninja 250 Danmoto Carbon Slip On,Factory Pro Jet Kit,K&N R-0990 Air Filter,10000K HID's,Carbon Fiber Shogun No Cut Frame Sliders & Swingarm Spools,SSR Lowering Links and more.... |
|
|
August 29th, 2011, 10:22 AM | #93 |
CVMA #74 WSMC #750
Name: Nemesis
Location: On the track
Join Date: Oct 2009 Motorcycle(s): All of them Posts: A lot.
|
I installed my sprocket upgrade this past weekend. I made a huge a mistake by removing the chain before the front sprocket.
I thought I had to buy a whole new master link and reattach the chain but eventually got it off w/smarts. Hard to describe but I did manage to take a pic of how I did it. I'll post up later tonight. |
|
August 30th, 2011, 08:14 AM | #94 |
ninjette.org member
Name: Canada
Location: Duncan, B.C. Canada
Join Date: Jul 2011 Motorcycle(s): 2010 Ninja 250r Posts: 80
|
2010 Ninja I Recieved jtf516-15. Do I need to shim this out or will I be ok. All the previous Threads I didnt see anything about shimming till yesterday.
__________________________________________________
2010 Ninja 250 Danmoto Carbon Slip On,Factory Pro Jet Kit,K&N R-0990 Air Filter,10000K HID's,Carbon Fiber Shogun No Cut Frame Sliders & Swingarm Spools,SSR Lowering Links and more.... |
|
August 30th, 2011, 03:53 PM | #95 |
ninjette.org certified postwhore
Name: Paul
Location: Roanoke, VA
Join Date: Jun 2009 Motorcycle(s): 2008 Candy Plasma Blue 250R Posts: A lot.
|
I had one of the JTF516-15 on my '08 for ~17,000mi, before it needed replacing. No shim was used. That said, if you can afford to wait to get a shim, I would. It's a small difference, but if my original 15T had been shimmed, I suspect it (and my chain) would've lasted longer.
__________________________________________________
Proud member of the Blue Army |
|
August 30th, 2011, 04:59 PM | #96 |
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
|
When I replaced my sprocket with the old style thinner sprocket, I had also ordered a new lock washer. I placed the old lock washer on the shaft first on the engine side of the cover, then the sprocket, then the new lock washer. If you read the earlier listings you will also find a spacer part number you can order that is used in the transmission. I have a 15/42 installed in one bike and 16/42 in the other. If you use a 16 tooth front sprocket you have to grind some metal out of your chain cover so the chain does not rub. If I were going to do it again I would use a 15/39 or 15/40 to avoid having to dremel out the sprocket cover. The 16/42 allows me to travel at 77 MPH at 8000 RPM instead of 60 MPH at 8000 RPM.
|
|
September 26th, 2011, 02:42 PM | #97 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
A word of warning: I damaged my output shaft, and/or bearings, by removing the stubborn counter-sprocket nut. My method of removal was no different than is mentioned in this thread. I continued to ride for another 20K miles, so it wasn't critical, but every now and again, when the road was super smooth, I could just feel a bit of unbalance. This was just a suspicion, until I went to replace my clutch, and damaged the input shaft, and/or bearings, removing/installing the nut for the clutch basket. I had the same damage, but it was more severe, and more obvious this time.
It is my belief that using breaker bars, and torque wrenches on these nuts is a potential cause of damage. For now on, I will only use an impact-wrench for these types of applications. You may not get the perfect torque speck, but getting it snug with the impact wrench should get it close, without the added risk of damage. I did this with a new engine, and have had no problems.... I forgot what it felt like to ride with a smooth transmission.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
September 27th, 2011, 10:00 AM | #98 |
ninjette.org member
Name: Aaron
Location: Oregon
Join Date: Aug 2011 Motorcycle(s): Ninja 250r soon Posts: 75
|
lol good topic here lol. I am sure i will put a 15t front. just to help with highway rpms
__________________________________________________
Getting a ninja 250 asap |
|
September 27th, 2011, 11:32 AM | #99 | |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
Quote:
I am amazed at what one tooth can do!
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
|
October 8th, 2011, 08:10 AM | #100 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Quote:
|
|
|
October 8th, 2011, 10:39 AM | #101 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
Long story short..... a new engine. If you read the thread where I lament about ruining my reputation here, it gives the whole story. It was a rough year.
I still have the old engine on my floor, and MAY have it rebuilt, but don't know if it would be cost effective it flip or not. I never did modify the registration with the new engine VIN#..... hope that doesn't come back to bite me.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
October 8th, 2011, 10:47 AM | #102 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Quote:
|
|
|
October 8th, 2011, 10:54 AM | #103 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
No, the new engine is good. The noise you are referring to either went away, or bothers me a lot less now. I'm a bit less compulsive these days (still trying to nail down the jetting though.... getting close).
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
March 14th, 2012, 04:58 PM | #104 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Got another JTF 1539.15 and JTR 486.41 today. Not sure I should attempt the front sprocket install after seeing @headshrink's problems. :/
Quote:
Last futzed with by CZroe; March 14th, 2012 at 08:42 PM. |
|
|
March 14th, 2012, 05:27 PM | #105 | |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
Quote:
I put the 15T on my replacement engine as well, and have not had any issues with it. However, I used an impact wrench instead of a breaker bar on the CS nut. IMO, specific torque on this nut is not critical because of the splined washer that is bent to hold the nut from spinning.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
|
March 15th, 2012, 09:28 AM | #106 |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Ah. Well, I don't have an impact wrench and I am willing to try it with what I have.
Now, I think I might have made a mistake. In anticipation of my new chain and sprockets arriving in the mail, I went ahead and broke off my old chain, loosened the nuts on the rear sprocket, and removed the front sprocket cover. Now that the new chain and sprockets are here, I realize that I can't use a completely disconnected rear tire to hold a CS sprocket from turning as I try to loosen the nut. I feel like it may be a bad idea to install the new chain with the new rear sprocket with the old front sprocket just to put all that force into it, especially when I still have the same front sprocket on there that a horribly failed chain was used with (cracked, missing, and C-shaped roller links visibly chewed up my last rear sprocket; had to have done something to the front too though it looked much better). I don't see how else to do it though, so I will be attempting to install the rear sprocket and new chain today unless someone has a better idea. Wish me luck! |
|
March 15th, 2012, 12:13 PM | #107 | |
ninjette.org guru
Name: Jason
Location: Houston, TX
Join Date: Nov 2011 Motorcycle(s): 2007 Ninja 250 (sold), '06 Ninja 650R Posts: 455
|
Quote:
|
|
|
March 15th, 2012, 01:34 PM | #108 | |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
|
Quote:
My buddy and I did that method on his CBR600 without issue. |
|
|
March 15th, 2012, 05:39 PM | #109 | ||
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Quote:
Quote:
|
||
|
March 15th, 2012, 06:54 PM | #110 |
ninjette.org certified postwhore
Name: .
Location: .
Join Date: Feb 2011 Motorcycle(s): . Posts: Too much.
MOTM - Feb '13, Feb '14
|
hahaha I bet they won't take it. It's got rubber o-rings in there
|
|
March 15th, 2012, 09:51 PM | #111 | |||
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
OK, all this talk about the sprocket nut, so it's time for something that goes hand-in-hand: Impact Wrenches.
I don't have an air compressor or an outlet by the bike. Unlike when I was in an apartment, I am finally in a living situation where I can run an extension cord, but I still think something I can power off of the motorcycle battery in a pinch would be best. Anyone think this will do the job on that countershaft sprocket? http://www.northerntool.com/shop/too...9025_200479025 Quote:
http://www.harborfreight.com/12-volt...nch-92349.html Quote:
Quote:
|
|||
|
March 15th, 2012, 11:02 PM | #112 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
I can't imagine that it wouldn't work.... it is a Kawi after all
A cordless might suit your needs a little better, but that depends on how much of an issue $$ is, and if you anticipate using the tool much.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
March 16th, 2012, 12:10 AM | #113 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Quote:
I don't really expect to use it for much. Bar ends, sprockets, etc. That's why my budget was for $20-30. My current bar ends have already been freed and I'm not sure it's enough for my sprocket, so it still may not have been a good idea. We'll see when I try it out! Anyway, I was reading the $20 HF unit's manual which gives instructions as if using it on cager lugnuts is the only use and it specifically said NOT to tighten the nuts with it. Well, then, why does it have a reverse function?! |
|
|
March 16th, 2012, 12:24 AM | #114 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
That's a good point. Technically I believe you aren't supposed to use an impact wrench in reverse anyways, but I think it can still be useful to spin a nut on, and use a torque wrench to finish it off.
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
March 18th, 2012, 01:05 AM | #115 |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Well, I got mine off when I figured out that you weren't supposed to push down on the nut with the socket using my 12v emergency impact wrench. The manual only said that it takes time to accelerate before it will hammer because it is electric, but you'd just hear it spin forever internally without knocking the nut if you didn't reduce pressure on the nut. I had to use it on the front axle nut too because I found it much too tight, once again, and I couldn't turn it by myself when using my T-handle wrench (whole axle would turn).
@Alex: Can you please edit the OP's DIY, post and PDF, with a word of warning about the correct CS sprocket orientation? It only makes sense for the spacer side to go IN or else the exact size difference between the pregen and newgen wouldn't matter, but this wasn't obvious to the OP or others following this DIY. @Vampyre, for example: |
|
March 18th, 2012, 01:07 AM | #116 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
It was mentioned sometime that first year, but it is a long thread and most probably don't read it all (don't blame them).
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
March 18th, 2012, 01:32 AM | #117 | |
CPT Falcon
Name: J.Emmett Turner
Location: Newnan, GA
Join Date: Apr 2009 Motorcycle(s): '08 CP Blue EX250J, '97 unpainted EX250F, 2nd '97 unpainted EX250F (no engine), '07 black EX250F Posts: A lot.
|
Quote:
Not to mention, the copy/paste thieves using the info on other sites/unsuspecting users. |
|
|
March 18th, 2012, 09:37 AM | #118 |
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
|
Is that edit correct at this point?
__________________________________________________
Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered) |
|
March 18th, 2012, 10:07 AM | #119 |
ninjette.org certified postwhore
Name: Bob
Location: CA
Join Date: Dec 2008 Motorcycle(s): '08 Ninja 250r, '14 CBR500r Posts: A lot.
|
Very good point, I didn't consider the PDF. It's a good idea anyways because if the DIY is self-explanatory, many (including myself) often don't keep reading because it usually isn't needed. So yes, an edit in the OP is only prudent. I wasn't disagreeing with you, maybe just splitting hairs for the sake of conversation... it's lonely here at night
__________________________________________________
Honda Interceptor VFR800 DLX (2014, 8th gen) Honda CBR500r (2014) - FOR SALE Kawi Ninja 250r (2008) - Restored and passed-down within family, only to be abandoned |
|
March 18th, 2012, 02:42 PM | #120 |
Ex ninjette!
Name: Jack
Location: East sussex England
Join Date: Nov 2011 Motorcycle(s): Suzuki GSXR 600 K4, Kawasaki ninja 250r 08 Posts: 294
|
Is it true that if i got a bigger rear sproket and smaller front that it would put my spedo out?
__________________________________________________
Mods: Puig Double bubble windscreen, Targa Fender eliminator, Custom LED integrated Tail light, Exhaust Hanger, Two brothers titanium exhaust More on the way! |
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Front sprocket change DIY? | Reyno2ac | 2008 - 2012 Ninja 250R Tech Talk | 10 | June 26th, 2012 05:33 PM |
15t front sprocket swap! | play2pwn | 2008 - 2012 Ninja 250R Tech Talk | 3 | October 17th, 2011 09:17 AM |
Sprocket swap tweak needed ? | eddiekay | 2008 - 2012 Ninja 250R Tech Talk | 13 | February 16th, 2011 06:09 AM |
still debating on which sprocket swap to do... | Hokie11 | 2008 - 2012 Ninja 250R Tech Talk | 7 | August 19th, 2009 05:59 AM |
sprocket swap for increased acceleration... | Ninja007 | 2008 - 2012 Ninja 250R Tech Talk | 34 | April 10th, 2009 02:32 PM |
|
|