May 12th, 2014, 06:05 AM | #1 |
ninjette.org newbie
Name: Dave
Location: Ct
Join Date: May 2014 Motorcycle(s): 2010 Ninja 250r Posts: 2
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Chain broke while riding- sprocket help needed
Hey guys,
I was riding yesterday and the chain on my 2010 250r snapped. Luckily I was just pulling out from a stop sign so I didn't fall or anything but now I have to replace it. I've watched a few videos on how to replace the chain and sprockets and the ones I've seen say to hold the back brake to get the front sprocket off, but since I have no chain, this won't work. Any ideas how I might remove the front sprocket? Also what are people's suggestions for sprocket sizes? Do differing sizes affect performance by much? Thanks |
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May 12th, 2014, 06:40 AM | #2 |
ninjette.org member
Name: Jason
Location: Queens, NYC
Join Date: Apr 2010 Motorcycle(s): 2010 Lime Green 250R Posts: 82
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remove it with your new chain on. 15T CS sprocket is a good place to start with and it's really depends on your riding style. I do 100% highway riding and I am aiming for lowest RPM at highway speed, 15/38 setup treat me well but it might be too long for another rider. http://www.gearingcommander.com/ is a good place to play around your gearing.
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May 12th, 2014, 06:48 AM | #3 |
ninjette coonass
Name: Joshua
Location: Lafayette, Louisiana
Join Date: Nov 2013 Motorcycle(s): 08 ninja 250, 06 wr450f, x15 110, tiny 50 Posts: 30
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You couldn't use the broken chain? If your holding the back brake it can't spin around to the broken spot. So just run it from the top of the rear sprocket to the front one? If the nut spins clock wise you will have to loop it under. Not sure which way the nut on the front sprocket has to spin and I can't seem to do a search on my mobile...
Posted via Mobile Device |
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May 12th, 2014, 06:59 AM | #4 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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A worthwhile investment is an impact wrench, 1/2" drive. Picked one up at Harbor Freight for $40. Using this with a quick trigger finger will release that nut. Make sure it's properly torqued when reinstalling.
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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May 12th, 2014, 07:28 AM | #5 |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
MOTM - Sep '15
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impact guns work wonders on sprocket removal.
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1 out of 1 members found this post helpful. |
May 12th, 2014, 08:35 AM | #6 |
ninjette.org newbie
Name: Dave
Location: Ct
Join Date: May 2014 Motorcycle(s): 2010 Ninja 250r Posts: 2
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Thanks for the quick responses! I'm going to try using the broken chain only because I'm stuck at home until I get a ride to the store from a friend. If not I'll try to get my hands on an impact gun. I'm going to play around with these sprocket combinations. Thanks again guys!
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May 12th, 2014, 10:35 AM | #7 |
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.
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I used their "Emergency 12v Impact Wrench" that was $24 after coupon (same 20% off coupon they have everywhere). It worked beautifully. That one was particularly useful because I had no air compressor and couldn't work near an electrical outlet (connect it to the bike's battery).
Make sure to get the right-sized impact socket (can't recall)! |
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May 12th, 2014, 01:33 PM | #9 |
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.
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Are you talking about the ones that take a battery pack or the ones that connect to your bike's battery? The $30 ones that are normally $25 after coupon and the emergency 12v one are all on sale right now for $16 after coupon.
I still like the emergency 12v one because it's good enough for our bikes and there's nothing else to buy besides metric impact sockets (of course). The included SAE sockets are worthless for our bikes but they came in handy for changing car tires recently, so it is another positive attribute for the 12v emergency one. If you get hex socket adapters for other jobs make sure to get the long ones. Almost everything that has needed them has needed the longer ones (reaching the fork oil drain bolts, for example). |
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May 12th, 2014, 06:11 PM | #11 |
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.
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Ah. I think it's a bit more expensive than that. The two I can find are both on sale for $50, $40 after coupon (normally $70).
I was interested since the "Emergency" 12v one may not be designed for long-term use and has lower specs, but they probably describe it as "Emergency" because it's intended to be kept in your trunk for "Emergency" situations (roadside tire changes). That's also why it comes in a plastic case. |
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May 12th, 2014, 06:27 PM | #12 | |
Daily Ninjette rider
Name: Hernan
Location: Florida
Join Date: Mar 2011 Motorcycle(s): 2007 Ninja 250 Posts: A lot.
MOTY - 2016, MOTM - Dec '12, Jan '14, Jan '15, May '16
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Quote:
What will prevent the next chain from snapping? It is possible that your current chain and sprockets are perfectly fine, needing only a decent riveted master link.
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Motofool .................................Never ride faster than your guardian angel can fly "Mankind is composed of two sorts of men — those who love and create, and those who hate and destroy. Love is the bond between men, the way to teach and the center of the world." - José Martí |
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May 15th, 2014, 12:00 PM | #13 | |
Biker Noob
Name: Richard
Location: Durham, North Carolina
Join Date: Apr 2014 Motorcycle(s): 2004 Honda Shadow 750 Aero Posts: 176
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Per this website the current set I have I should be at 76 MPH at 8800 rpm
My set up is a 14/43 and right now I am at between 65 and 70 at 8800rpm So something is messed up. I am going to a 14/42 to drop it some more but I dubt it will drop much. Quote:
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May 15th, 2014, 12:08 PM | #14 |
Wannabe Reborn
Name: Unregistered
Location: Cincy Ohio
Join Date: Mar 2009 Motorcycle(s): Blue 2008 Ninja 250 Posts: 302
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Are you using your stock speedometer to reference the speed? Ninja 250 is notoriously known for over stating the speed.
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" If you're here to show off and prove that your crotch rocket is faster than my Harley, you can leave now. " |
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May 15th, 2014, 12:10 PM | #15 |
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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The error on both the tach and speedo themselves can be significant. You can calculate what it actually is right from the gear ratios (use www.gearingcommander.com to tweak at will), regardless of what the gauges are telling you.
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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) |
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May 15th, 2014, 12:12 PM | #16 |
Biker Noob
Name: Richard
Location: Durham, North Carolina
Join Date: Apr 2014 Motorcycle(s): 2004 Honda Shadow 750 Aero Posts: 176
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Yes That is all I have to go by. I am on the Highway going 65 70 and I am around 9000rpms even though I am a 14/43 it much less than the stock 14/45 but I am going to go to a 14/42 to see if that lowers it a bit more. Since I ride on the highway a lot it seems I burn through gas faster.
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May 17th, 2014, 05:55 AM | #17 |
Board Member
Name: ...
Location: WI
Join Date: Dec 2011 Motorcycle(s): 250R (street), 250R (dirt) Posts: A lot.
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At least my odometer is dead on.
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