Jerks when accelerating

[mrToby]

Hi all,i bought my first bike 2 weeks back.A honda jade cb250 92.Great fun .
Anyways when i go to accelerate it jerks.But only when i accelerate from having no throttle on at all.So when i'm engine braking or just letting off cause my speeds picking up when i go to apply throttle again it jerks a bit.Not bad enough to effect my riding ability though.However if i throttle on very slowly it doesnt do this.But regardless of it being normal throttling or "spirited " throttling it does this.

I dont know alot of people with bikes to try and compare or ask for opinions on the matter.Everything else on the bike runs fine and all other aspects of the acceleration/deceleration process seem to work flawlessly.i just worry that eventually over time it might cause damage,or is already a problem : /

My best thought was perhaps the carbs are dirty and dumping just a little too much fuel in when i first open the throttle.
Sadly my knowledge with bikes is very limited.

Does anyone have any ideas or is this normal for a bike?

Cheers

[Akzle]

chain tension

[mrToby]

chain tension

Loose or too tight?

[Akzle]

Loose or too tight?

yep .

[caseye]

Most likely too loose!
Don"t worry about young Akz there he means well, just can't always get it out proper like.

[Akzle]

Most likely too loose!
Don"t worry about young Akz there he means well, just can't always get it out proper like.

shaddup old boy, stick to your latés and smog.

It makes no difference, our new esteemed colleague has to check his chain tension to ensure its CORRECT.

And i dont always mean well

[unstuck]

How much water is in your fuel?

[Erelyes]

There are plenty of jerks out there, I just ignore them regardless of whether I'm accelerating, cornering or whatever. HTH

[mrToby]

Thanks for the info guys i looked up how to check my tension and at a fiddle it appears to be a little loose but auckland strikes again and rains just as im getting ready to get stuck into and make certain its too loose.

So when auckland lets me i'll get into it and let you all know

[mrToby]

Ok so i've tightened the chain but sadly it hasn't effected it.There is however a tiny amount of play in the sprocket itself that i discovered.Not side to side but in the direction that the chain flows.just 2-3 mm total backwards an forwards and i have to grab the sprocket and hold the wheel.doesnt move that easy lol.I did a quick google search before posting it here an bothering you all and some people said that its a indicator of a worn cush drive and others say that a small amount of movement is normal.I hate the internet sometimes.so indecisive lol

thoughts?


Edit-been doin alot of reading and it seems a little movement is normal and too much means broken lol

[haydes55]

Can't you get done for indecent exposure for jerking on a motorbike?

Also, if your revs drop down quite low then most bikes would jerk a bit getting going again. So a bit of jerking is normal.... All boys do it.

[mrToby]

Can't you get done for indecent exposure for jerking on a motorbike?

Also, if your revs drop down quite low then most bikes would jerk a bit getting going again. So a bit of jerking is normal.... All boys do it.

If only the jerking im getting was that much fun.Doesn't matter where the revs are at.Just that theres no throttle open at all.When i reapply some gas is give a tiny jerk.My friends bike doesnt jerk but his bike is very different to mine.fuel injected,vtwin 2011 model bike.Its a bad comparison.

[Akzle]

Ok so i've tightened the chain but sadly it hasn't effected it.There is however a tiny amount of play in the sprocket itself that i discovered.Not side to side but in the direction that the chain flows.just 2-3 mm total backwards an forwards and i have to grab the sprocket and hold the wheel.doesnt move that easy lol.I did a quick google search before posting it here an bothering you all and some people said that its a indicator of a worn cush drive and others say that a small amount of movement is normal.I hate the internet sometimes.so indecisive lol

thoughts?


Edit-been doin alot of reading and it seems a little movement is normal and too much means broken lol

i would think 2-3mm IS excessive for cush wear.

just wanted to rule out the obvious first.

however, it's starting to sound like backlash in the box, which there is SFA you can afford do do shit about. get used to it.

take the chain off, with it in gear, turn sprocket by hand widdershins, until you pick up the crank, then turn it deiseal until it picks up something else. that's your backlash.

[Akzle]

oh yeah. and auckland sucks balls all the time.

[mrToby]

Thanks for the advice.Just did some reading on backlash and it sounds like its hit the nail on the head.I think i'll still replace the cush drive first chance i get and try what you said too.

But yes i dare say i'll get used to it lol