DillHD Posted June 21, 2015 Share Posted June 21, 2015 Ive had my new bike for around 4 weeks and noticed that when i'm driving and i let of the throttle (maybe a car is slowing in front) and then i apply the throttle again it jerks forward, this happens in all gears but its most violent in 1st, 2nd, 3rd. I'm a bit worried at turning sharp corners cause I cannot put throttle on during the corner because of it. I've bought some chain grease/wax and that seemed to help with it a tiny bit but i'm still not sure, I think the chain may need tightening but i'm unsure how to tell, it seems like its got quite some slack in it (can lift it ~1.5inch) but when i put it in gear it tightens up. Also not sure if this is related but engine braking in 2nd gear seems quite powerful. Bike is a 125cc supermoto, 2014 model. Quote Link to comment Share on other sites More sharing options...
fullscreenaging Posted June 21, 2015 Share Posted June 21, 2015 Are you reapplying the throttle gently or snatching it back on?Is there any free play in the throttle? You should have about 2mm of play before the throttle kicks in.EDIT: By the way, you RIDE a bike, you DRIVE a car [emoji12] Quote Link to comment Share on other sites More sharing options...
fq-craigus Posted June 21, 2015 Share Posted June 21, 2015 Have you checked your cush drives? Drop the wheel out and chexk them of they are worn you will see this happen. Other than that things like chain tension, lubrication ect will help. Has the sprockets been changed? If they have that can cause a more agressive throttle Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted June 21, 2015 Share Posted June 21, 2015 i would check chain adjustment before anything else sounds like a case of sloppy chain Quote Link to comment Share on other sites More sharing options...
Lumor_uk Posted June 21, 2015 Share Posted June 21, 2015 guessing it's fuel injected? have same with my bike, is worse when chain is very slack. though 20mm is the norm on mine. practice feathering the clutch when changing gear. Quote Link to comment Share on other sites More sharing options...
DillHD Posted June 21, 2015 Author Share Posted June 21, 2015 Are you reapplying the throttle gently or snatching it back on?Is there any free play in the throttle? You should have about 2mm of play before the throttle kicks in.EDIT: By the way, you RIDE a bike, you DRIVE a car [emoji12] Hahaha. It happens what ever i do, its a little less violent if i ease it on really really slowly. And it does have a few mm before the throttle kicks in Quote Link to comment Share on other sites More sharing options...
DillHD Posted June 21, 2015 Author Share Posted June 21, 2015 Have you checked your cush drives? Drop the wheel out and chexk them of they are worn you will see this happen. Other than that things like chain tension, lubrication ect will help. Has the sprockets been changed? If they have that can cause a more agressive throttle Could stuff like that happen on a bike this young? Its only done 2000 miles? Quote Link to comment Share on other sites More sharing options...
DillHD Posted June 21, 2015 Author Share Posted June 21, 2015 i would check chain adjustment before anything else sounds like a case of sloppy chain Yeah I googled around a bit before I posted here and chain adjustment kept coming up, how would I know when its tight enough? Going to give this a go later on Quote Link to comment Share on other sites More sharing options...
fq-craigus Posted June 21, 2015 Share Posted June 21, 2015 Have you checked your cush drives? Drop the wheel out and chexk them of they are worn you will see this happen. Other than that things like chain tension, lubrication ect will help. Has the sprockets been changed? If they have that can cause a more agressive throttle Could stuff like that happen on a bike this young? Its only done 2000 miles? Depends how its been ridden or maintained. They are all servicable items and wear at different rates. Chain tension is most obvious, have you had bike from new? If not then someone may have changed sprockets for acceleration Quote Link to comment Share on other sites More sharing options...
Mr Fro Posted June 21, 2015 Share Posted June 21, 2015 how would I know when its tight enough?Have a look in the manual - sometimes it's on the swing arm too. Quote Link to comment Share on other sites More sharing options...
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