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-   -   Jumping (http://www.gz250bike.com/forum/showthread.php?t=3328)

ncff07 06-12-2010 10:06 PM

Jumping
 
I've searched the boards and didn't see anything specifically to this so I'll post it. I'm still learning on my bike and have done some stuff to it but I'm stumped here. When I start it I do so out of gear most of the time unless I leave it in gear parked somewhere other than home. Ive noticed when I get on and ready to go when I put it down into first gear it will jump for just a second then be fine. Also noticed the times Ive been somewhere and left it in gear parking once I start it back up it will jump then too. With the clutch lever all the way in and in gear it will roll freely either way theres no friction whatsoever there. I did adjust the cable to within specs and it still does it but in gear and the clutch disengaged its still free. Any ideas?

blaine 06-12-2010 10:57 PM

Re: Jumping
 
Sometimes if the oil is to heavy,or is above the full mark it will cause the condition you describe.

Water Warrior 2 06-13-2010 01:49 AM

Re: Jumping
 
This is a common occurance and nothing to worry about. All specs and levels can be perfect and jumping will still happen in the majority of bikes. This is due to the design of the bike and nothing more. The cause is dragging clutch plates and cold oil on start up, no biggy.

Easy Rider 06-13-2010 11:32 AM

Re: Jumping
 
Quote:

Originally Posted by ncff07
Any ideas?

Absolutely 100% normal.
The "wet" clutch has a fluid coupling effect when the oil is cold.....and then the transmission parts will spin freely when hot.
Nothing to worry about.

ncff07 06-13-2010 05:11 PM

Re: Jumping
 
Good. Thanks. Im still learning and have a long way to go!

Viirin 06-14-2010 10:52 AM

Re: Jumping
 
turning down your idle might reduce the jump...but i don't think you can stop it

vii

alantf 06-14-2010 11:24 AM

Re: Jumping
 
Quote:

Originally Posted by Viirin
turning down your idle might reduce the jump...

...... but ONLY if it's too high to start with, & you'll only be able to check that when the engine's THOROUGHLY warmed up. :)

Water Warrior 2 06-14-2010 05:29 PM

Re: Jumping
 
Quote:

Originally Posted by alantf
Quote:

Originally Posted by Viirin
turning down your idle might reduce the jump...

...... but ONLY if it's too high to start with, & you'll only be able to check that when the engine's THOROUGHLY warmed up. :)

For sure, don't have the idle too low or you may have other problems show up. Not enough oiling at idle speeds, the tranny and clutch need a certain amount of internal spin to engage properly. Nor will the engine breath well enough to run properly.
After a cold start you may want to have the tranny in neutral and pull/release the clutch a few times to free up the clutch plates. Different brands of oil might make a slight difference too but then we get into splitting hairs and all sorts of nonsense when any good oil will get the job done.

ncff07 06-14-2010 10:35 PM

Re: Jumping
 
I think the idle is fine, not too high and not too low. As far as i know its still set the same from the factory with less than 1200 miles too. No blueing on the exhaust either and im leery of messing with the idle just yet. The oil level as someone mentioned is fine I changed that after i got it and its within spec and the oil i used is Suzuki 10/30 motorcycle oil i got from the dealer when i ordered the filter and o rings. I'll try working the clutch in neutral and see what happens there. But if that slight jump is present in most of these bikes Im not going to worry about it much.

alantf 06-15-2010 05:41 AM

Re: Jumping
 
Quote:

Originally Posted by ncff07
I think the idle is fine, not too high and not too low. As far as i know its still set the same from the factory

Factory setting is nothing to go by, & for all I know it could have shifted adjustment in transit. If you look under the carb, you'll see a big white knob. When the engine is THOROUGHLY warmed up, don't be afraid to twiddle it until you get it set to your liking. Don't forget that the Suzuki spec of 1200 - 1400 RPM (at idle) is your starting point. :2tup:


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