May have clutch issues?
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Senior Member
Superstock
Joined: Apr 2009
Posts: 395
From: Columbus, OH
May have clutch issues?
So i have this odd sond that has developed when i let out the clutch and accelerate. In first and second its noticable but not much after that. Not sure if its cause its too loud at that point or just not there. Now to try and describe it. I dont even know. A hollow aluminum sound? Like the sound of sitting idle with the clutch out but different. I am clueless how to describe it so if you guys want to start throwing ideas out go for it.
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MotoGP
Joined: May 2008
Posts: 3,452
From: San Clemente, CA
Do you have an advancer on your bike? It could be detonation (pinging) if your timing is overadvanced.
Try short shifting into 2nd at about 2000 rpm, then open it up. If it sounds like marbles bouncing off your pistons, it's detonation. Which could also be caused by excessive carbon deposits in the combustion chambers and/or low octane fuel.
Try short shifting into 2nd at about 2000 rpm, then open it up. If it sounds like marbles bouncing off your pistons, it's detonation. Which could also be caused by excessive carbon deposits in the combustion chambers and/or low octane fuel.
Thread Starter
Senior Member
Superstock
Joined: Apr 2009
Posts: 395
From: Columbus, OH
I havent had a chance to really feel it out yet. I noticed close to my house and once i pulled it into the garage i have not had it back out. I did try shifting different with no change in the outcome. VTRsurfer, i dont have an advancer. Its only under load in the first couple gears. I dont know....
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MotoGP
Joined: May 2008
Posts: 3,452
From: San Clemente, CA
Over advanced timing is only one possible cause of detonation. Detonation only occurs under load, and is most noticeable when load is applied (full throttle) at low rpm. But of course you don't want to do that in 1st. That's why I said try short shifting, and nailing it in 2nd at low rpm. Or just slow down to below 2000rpm in 2nd then nail it.
Did you fill up with gas just before it started doing this? I once bought gas from a station, and my truck detonated like crazy going up a hill. I ran a couple of tanks from another station with no problem, then tried the first one again, and again got bad detonation. I never bought from that station again.
So try filling up with premium, or add some octane boost. If it still makes the noise, it's probably not detonation. Good luck.
Did you fill up with gas just before it started doing this? I once bought gas from a station, and my truck detonated like crazy going up a hill. I ran a couple of tanks from another station with no problem, then tried the first one again, and again got bad detonation. I never bought from that station again.
So try filling up with premium, or add some octane boost. If it still makes the noise, it's probably not detonation. Good luck.
Thread Starter
Senior Member
Superstock
Joined: Apr 2009
Posts: 395
From: Columbus, OH
At idle with the clutch in or out its fine. Once settled at speed its fine. Its noticible when letting out the clutch in first and after shifting to second. i will try and diagnose a lttle better today. Its work time now though
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