Hey guys.. I had my 650 out for a run the other nite and got pretty dirty.. I thought I'd better wash what dirt I could off it before I put it in my shed. Also it was getting close to the freezing mark in temp outside... After about 3 days in the shed with cold tempretures outside.. I knew one of my tires was losing air so I pushed my bike out and jacked it up removing the front wheel.. I left the bike out all day and it was pretty cold out... So after I got my wheel fixed and was ready to put back in shed I put on my choke and started the bike up. It ran for about 2 min before it started to idle low and start to sputter.. I usually run over and shut the choke off and let it idle on its own... But this time it stalled and I had a heard time getting it going by playing with choke and holding throttle in.. When I got it going finally it started knocking something wicked!! I thought it was gonna throw a rod or something!! But soon as I touched the thottle it would go away.. then come back again... It did this for about 30 sec then cleared up and I drove it into the shed and lite the wood stove to thaw it out.. Would have the belt been frozen? What about oil pressure? I mean it didn't do this right away when it was first warming up for 2 min? Any body have any suggestions or had this problem? Thanks!

 

My guess would be a clutch related noise.

 

I agree with TRX450... probably sticky / frozen wieghts in the primary clutch...

 

Thanks for the input guys.. So is this a serious thing or just make sure its thawed out before I go riding?
Thanks again!

 

I think it is the compression release weights sticking. Mine did that every other time I started it up whe new but went away. It was clearly not coming from the clutch cover. Not a muffled sound at all.

ac

 

therock--- wouldn't the bike start, or run funny with the compression release malfunctioning? I guess the noise could be found by listening thru a piece of vacuum or fuel hose, aka a stethoscope. My P-650 knocked like this, in the cold. My noise came from the primary clutch area.

 

Yours may be different then. Mine was clearly not from that area.

 

if the knock comes from the clutch when it's cold it's the wear shoes they have to much clearance [0.0-0.04"is what you need to have]
the other noise [compression release??] goes away when you rev it up and does not come back

 

I'm coming up for service in about 10 hrs so I will get the dealer to check it out for me... I just hope something was froze like ice on the belt or something.. I'll make sure its defrosted next run out.. Thanks again..!