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Main Area => General GS500 Discussion => Topic started by: ron freeman on June 04, 2014, 04:19:00 PM

Title: Weird Jerk
Post by: ron freeman on June 04, 2014, 04:19:00 PM
My bike runs good but when I release the clutch in 2 and up gears it seems like there's a delay in it or something else. It don't slip but a slight delay in acceleration if I don't go straight on the gas. I can get going, let off the gas and re-engage the throttle and it'll jerk. It's subtle but I can tell something is not right. Is there a primary chain inside of it somewhere or could it be something else?
Title: Re: Weird Jerk
Post by: twocool on June 04, 2014, 04:20:45 PM
I've been called that a few times.........

Can't help with the clutch problem...

Cookie





Quote from: ron freeman on June 04, 2014, 04:19:00 PM
My bike runs good but when I release the clutch in 2 and up gears it seems like there's a delay in it or something else. It don't slip but a slight delay in acceleration if I don't go straight on the gas. I can get going, let off the gas and re-engage the throttle and it'll jerk. It's subtle but I can tell something is not right. Is there a primary chain inside of it somewhere or could it be something else?
Title: Re: Weird Jerk
Post by: ron freeman on June 04, 2014, 04:24:03 PM
I know on my Harley you occasionally need to adjust the primary drive chain. I just didn't know if the GS had the same thing.
Title: Re: Weird Jerk
Post by: yamahonkawazuki on June 04, 2014, 04:53:18 PM
Quote from: ron freeman on June 04, 2014, 04:19:00 PM
My bike runs good but when I release the clutch in 2 and up gears it seems like there's a delay in it or something else. It don't slip but a slight delay in acceleration if I don't go straight on the gas. I can get going, let off the gas and re-engage the throttle and it'll jerk. It's subtle but I can tell something is not right. Is there a primary chain inside of it somewhere or could it be something else?
not a porimary chain poerse like the hd, ( my 883c/1200 conversion ( with supercharger :d, DID THIS UNTIL I HAD EVERYTHING DIALED IN RIGHT. THE GS, TRY FIRST, LUBING THE CABLE eH? sorry bout caps. lol
Title: Re: Weird Jerk
Post by: ron freeman on June 04, 2014, 05:06:48 PM
I want to see that supercharged HD. I have a 1200 Sportster.
I cleaned a bunch of gunk off the rod that goes to the clutch packs. Could that be my issue?
Title: Re: Weird Jerk
Post by: Big Rich on June 04, 2014, 05:23:23 PM
What about the cush drive rubbers in the rear wheel hub? That, or maybe there is too much slack in the drive chain......or maybe your rear axle is loose allowing your wheel to slide forward and back in the swinger? I'd hope it's not the axle.
Title: Re: Weird Jerk
Post by: ron freeman on June 04, 2014, 05:35:46 PM
My GS has 7000 miles on it so I hope no rubbers are worn yet as it stays garaged. Drive chain it tight. I didn't retorque the axle bolt when I changed the front sprocket so it may be part of the issue. I'll check it. Thanks for the suggestion. As a matter of fact I had troubles until I took the 17T off and put the stock 16 back on.
Title: Re: Weird Jerk
Post by: yamahonkawazuki on June 04, 2014, 05:41:07 PM
Quote from: ron freeman on June 04, 2014, 05:06:48 PM
I want to see that supercharged HD. I have a 1200 Sportster.
I cleaned a bunch of gunk off the rod that goes to the clutch packs. Could that be my issue?
the parts came off of a big twin I obtained at an HD swap meet.  its engaged through the cam cover. will see if I can locate the build pics if not, ill makje one for you, showing what I used. was hell since it was still under warranty. the conversion was covered since I am HD certified. aka, I got paid to work on my own bike. BUT it could be un done in 2 hours if I had top bring to dealer. also have to find the fuel chart as well. at first, the only thing I could run was av gas or race fuel. will dig up the data on my mmi sheets. and give to you, the parts used, etc.  anyhoo my friend, wish you success.
Aaron
Title: Re: Weird Jerk
Post by: ron freeman on June 04, 2014, 05:45:01 PM
Sweet. Thank you.
Title: Re: Weird Jerk
Post by: Joolstacho on June 04, 2014, 08:10:52 PM
Worn sprocket(s)
Title: Re: Weird Jerk
Post by: BockinBboy on June 04, 2014, 10:05:51 PM
My vote is toward your drive chain slack... If that checks out between .5-1" then I'd look toward lubing the chain, then toward worn drive components such as the sprockets and chain itself.

- Bboy
Title: Re: Weird Jerk
Post by: yamahonkawazuki on June 04, 2014, 10:10:51 PM
Quote from: BockinBboy on June 04, 2014, 10:05:51 PM
My vote is toward your drive chain slack... If that checks out between .5-1" then I'd look toward lubing the chain, then toward worn drive components such as the sprockets and chain itself.

- Bboy
agreed. lubbe/adjust anything in drive. from cables to chain. anything. make sure its all within spec.
Title: Re: Weird Jerk
Post by: bombsquad83 on June 05, 2014, 05:50:26 AM
I think what you are describing could be due to a rich mixture at low rpm, possibly caused by worn float needles or insufficient float height.  When you close the throttle and pull the clutch, the bike will run off the pilot circuit.  If the pilot circuit is rich, and/or there is too much gas in the bowl, then too much gas will be fed into the engine.  When you try to then accelerate out, you will get a rich stumble unless you open the throttle more.  Seems to be similar to what you are describing.  What rpm are you typically running immediately after an upshift? 

I agree about checking your chain slack first though.
Title: Re: Weird Jerk
Post by: gsJack on June 05, 2014, 07:17:43 AM
Only 7k miles on a late model in GS years :-) shouldn't have cush rubber problems but the chain needs to be right, properly adjusted and no kinks, I had kinky chain jerks most springs after winters of salt water baths.  Have you made a 3 point clutch adjustment yet?  If not do so now.  Both my 97 bought new and my 02 bought with only 4k on it in 03 had too much push rod free play and started acting quirky by the time they had your mileage even with handle free play adjusted right, only did it 2 or 3 times in 100k miles on the 02 so it holds a long time after set right.

I wouldn't dismiss it being a carb problem but both my GSs were run stock all the way year around here in NE Ohio and didn't have that problem, but neither ever sat unused for long periods of time allowing jets to become clogged requiring cleaning.  I use to shift as fast as I could close and open my left hand with a little throttle movement on the right when accelerating hard for hours on end running thru the mountain twisties down near where you live without missing a beat.  So it could be your carbs need a little attention but I'll  leave that to our carb experts.

3 point clutch adjustment per shop manual:

http://img.photobucket.com/albums/v443/jcp8832/GS500clutchadjustment_zps58ca4ce8.jpg
Title: Re: Weird Jerk
Post by: Erika on June 15, 2014, 03:39:28 PM
I had that same jerk, and also knew my chain was old. It had some tight spots and some loose spots, which means it was worn out. The driven sprocket also looked a little worn in the teeth. I finally got sick of that jerk and replaced the chain and both sprockets. It feels great now!
Title: Re: Weird Jerk
Post by: bombsquad83 on June 15, 2014, 04:57:48 PM
The more I think about this, the more I think it might be the clutch in need of adjustment.
Title: Re: Weird Jerk
Post by: The Buddha on June 15, 2014, 06:07:28 PM
Quote from: bombsquad83 on June 05, 2014, 05:50:26 AM
I think what you are describing could be due to a rich mixture at low rpm, possibly caused by worn float needles or insufficient float height.  When you close the throttle and pull the clutch, the bike will run off the pilot circuit.  If the pilot circuit is rich, and/or there is too much gas in the bowl, then too much gas will be fed into the engine.  When you try to then accelerate out, you will get a rich stumble unless you open the throttle more.  Seems to be similar to what you are describing.  What rpm are you typically running immediately after an upshift? 

I agree about checking your chain slack first though.

+1 ... but my suggestion is a bit different ... especially if it ran fine then started doing this. Air filter got dirty ... Or your weather got hot and dry ...

Either way you have too much fuel for the air.

Cool.
Buddha.
Title: Re: Weird Jerk
Post by: ron freeman on June 19, 2014, 05:48:09 PM
Just so all know..the jerk was from where I cleaned all the grease off the clutch rod that runs from one side of the motor to the other. I greased it and no more delayed clutch engage. It is actually smoother than before. Problem solved. Thanks to all who offered advise. Long live the little 500.
Title: Re: Weird Jerk
Post by: cbrfxr67 on June 20, 2014, 11:10:53 AM
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