Slight lurch??

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Old Aug 19, 2007 | 05:48 PM
  #1  
Redlinejohn's Avatar
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Default Slight lurch??

I occasionally experience a slight lurch (as if the chain or clutch is slipping). New bike (1000 miles) chain and clutch are adjusted properly. The best way to describe it is I'm riding along the street at say 40 mph, and it feels as if the chain jumps a tooth. It doesen't--just feels that way. Not especially violent, just mild.

Any of you had that experience? Thanks.
 
Old Aug 19, 2007 | 07:50 PM
  #2  
klx250s_rider's Avatar
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Default RE: Slight lurch??

Could even be a carb surge or lousy gas. With only a 1000 miles I doubt if it's the clutch, sprocket or the chain - have you checked the chain slack? Been doing any real hard riding on it? Done any mods to it yet? Need more info!
 
Old Aug 19, 2007 | 08:59 PM
  #3  
sinkoman's Avatar
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Default RE: Slight lurch??

Perhaps your air fuel mixture is way off.

I know that a lean bike will have a horrid flatspot in the higher rev range, and bike will sort of sputter and lurch its way along whilst in that flatspot.
 
Old Aug 19, 2007 | 09:23 PM
  #4  
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Default RE: Slight lurch??

sounds like its lean. before i purchased a full pipe i punched the baffles out of the stock pipe. this created a lurch at 6000rpm's due the how lean it was. these bikes come from the factory notoriously lean.
 
Old Aug 19, 2007 | 10:43 PM
  #5  
2k1w=no$'s Avatar
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Default RE: Slight lurch??

Like the others said, I had the same thing after pipe and jetting at certain rpms. I rasied the needle a notch and it has seemed to go away.
 
Old Aug 20, 2007 | 01:51 AM
  #6  
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Default RE: Slight lurch??

Mine was doing that too so I put 91 octane gas in it and it runs fine now.
 
Old Aug 20, 2007 | 02:08 AM
  #7  
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Default RE: Slight lurch??

+1 on the better gas. I only ever felt it when the bike was fairly cold. I wait about 1 minute after starting up and then drive slow for a bit. Sometimes I get a tiny studder when giving it gas. Once She's warm though(3 or 4 minutes) she don't miss abeat. I can only seem to get 87, 89 or 93 octane Gas here in NC so I go with 93 and I see a big difference over the 87.
 
Old Aug 20, 2007 | 02:20 AM
  #8  
FM_Thumper's Avatar
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Default RE: Slight lurch??

Oh no!Not the Placebo High Octane Gas Myth again!

[sm=forgetit.gif]

 
Old Aug 20, 2007 | 04:43 AM
  #9  
klx250s_rider's Avatar
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Default RE: Slight lurch??

Could be a loose valve stem cap on your rear tire

Actually KawiKathy and Gerry are dead on with this one. Those viagra placebo's really do work!!!
 
Old Aug 20, 2007 | 11:37 AM
  #10  
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Default RE: Slight lurch??

Lurch?! 'You rang?!' [8D]
 



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