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Author Topic: Bike is Jolty  (Read 1362 times)

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Offline Jarhead12

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Bike is Jolty
« on: July 01, 2010, 05:57:40 PM »
My bike seems to be really jolty... like i let off the gas and when i go to put it back on it jolts and isn't smooth at all. Also when i twist the throttle all the way the bike stutters and sounds like overloaded i guess. Any help? Its a cb350f 1974
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Offline Gordon

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Re: Bike is Jolty
« Reply #1 on: July 01, 2010, 07:14:05 PM »
The early sohc4's without an accelerator pump don't handle full-throttle twists very well.  You need a smooth, steady throttle roll. 

Without knowing more about your bike or the problem, my first guess is that you're just not operating the clutch and throttle smoothly enough for what the bike can handle. 
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Offline Alan F.

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Re: Bike is Jolty
« Reply #2 on: July 01, 2010, 08:10:16 PM »
What state of tune is it in?  That's a starting point for sure, a well maintained bike eliminates so many possible issues.
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Offline Jarhead12

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Re: Bike is Jolty
« Reply #3 on: July 01, 2010, 08:14:35 PM »
it just got it goin but have ridden it for about two weeks. and i'm not using the clutch. the jolt comes from when i take the gas off and using no brake just some engine compression to stop me but when i put the gas back on it jolts very bad. similar to revving and dropping the clutch
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Offline Caseygroh1

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Re: Bike is Jolty
« Reply #4 on: July 01, 2010, 08:38:07 PM »
your battery might be dying. same thing happens to me sometimes. check the voltage, look in the manual for what the proper voltage should be at idle and at revs. above 3000 rpms, it should be around 14.7 I think the book says.
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Offline camelman

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Re: Bike is Jolty
« Reply #5 on: July 01, 2010, 09:41:53 PM »
Do you mean it kicks and bucks multiple times or just one time?  If it is just one time, then check your drive chain to make sure it isn't loose.  Other than that, the 350Fs have a little slop in the engine/transmission that lead to a bit of a jerk whenever you switch between engine braking and powering, so you do have to live with a bit of it.  Try rolling the throttle more slowly until the engine starts pushing, and then roll on harder.

Camelman
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Offline Mdub

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Re: Bike is Jolty
« Reply #6 on: July 01, 2010, 10:26:32 PM »
Those symptoms are consistant with a loose primary and/or drive chain and/or drive cushions in the rear wheel assembly as well as a rich mixture. Low mileage would make the drive chain a likely culprit.
Worn sprockets also tend to add to a 'chunky' feeling.
Good luck!
Mike
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Offline dave500

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Re: Bike is Jolty
« Reply #7 on: July 02, 2010, 03:29:32 AM »
im with gordon on snapping the throttle open too fast,,i think you have a different problem though
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Offline Gordon

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Re: Bike is Jolty
« Reply #8 on: July 02, 2010, 10:16:37 AM »
Quote from: Mdub on July 01, 2010, 10:26:32 PM
Those symptoms are consistant with a loose primary and/or drive chain and/or drive cushions in the rear wheel assembly as well as a rich mixture. Low mileage would make the drive chain a likely culprit.
Worn sprockets also tend to add to a 'chunky' feeling.
Good luck!
Mike

After reading your update, these sounds like the most likely issues.  A sloppy drive chain will definitely make engine braking jerky, and engine braking in 1st gear will always be jerky. 
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Offline Jarhead12

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Re: Bike is Jolty
« Reply #9 on: July 02, 2010, 01:13:16 PM »
alright so i just need to adjust my chain?
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Offline Duke McDukiedook

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Re: Bike is Jolty
« Reply #10 on: July 02, 2010, 02:50:32 PM »
Yeah, if it isn't worn out.
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Offline Jarhead12

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Re: Bike is Jolty
« Reply #11 on: July 02, 2010, 03:53:16 PM »
alright will do. is that accomplished by scooting the back tire backwards?
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Offline Gordon

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Re: Bike is Jolty
« Reply #12 on: July 02, 2010, 03:56:53 PM »
Quote from: Jarhead12 on July 02, 2010, 03:53:16 PM
alright will do. is that accomplished by scooting the back tire backwards?

Yes.

If you don't have a manual, you can download one for free from the thread at the top of the sohc4 tech forum. 
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