Shut off engine: cam chain keeps spinning???

[RacerAV]

No clue what is happening in my freshly rebuilt motor! I shut the bike off after a short ride down the street. The bike was OFF, but something in the case was spinning, sounded like the cam chain was still going! It was in neutral, could that be why? Is this a common thing or did the builder leave off a bolt lol...

Thanks!

[XR650L_Dave]

43 minutes ago, RacerAV said:

No clue what is happening in my freshly rebuilt motor! I shut the bike off after a short ride down the street. The bike was OFF, but something in the case was spinning, sounded like the cam chain was still going! It was in neutral, could that be why? Is this a common thing or did the builder leave off a bolt lol...

Thanks!

It's a 650L?

Maybe something for the starter drive?

It would be the strangest darn thing I ever saw.

[JoeRC51]

Have you tried it again ? 

[RacerAV]

Have you tried it again ? 

Yeah, I was really reluctant to start it up again, afraid to mess something up in there. I started it up and did the same thing but the sound did not come back. It went for maybe five or six seconds. Weird sound. But definitely a chain around the gear like sound.

[EarthCruzn]

maybe the decomp fluttered

 

[brianhare]

LOL

 

This should be interesting..

 

 

B

[brianhare]

my vote is a burnt out muffler bearing...did it get hot..

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

lol

 

B

[JoeRC51]

No , it sounds like it's the kinooter valve.   What year bike , it was a one year deal.

[timbanditos]

All joking aside, have you experienced it again? Do you have a video of it to post? I can't imagine how your cam chain could keep spinning without turning the crank.....

[JoeRC51]

1 minute ago, timbanditos said:

All joking aside, have you experienced it again? Do you have a video of it to post? I can't imagine how your cam chain could keep spinning without turning the crank.....

And the bike start again.   ?

[brianhare]

Unless the one-way variable cam timing sprag crap the bed.it would ratchet for a bit when shut down

 

.does it spark knock under load...

 

 

B

[JoeRC51]

Well , the OP's been hiding in shame , I wonder if the bike was still rolling when he heard this chain sound.    ?

[RacerAV]

11 hours ago, JoeRC51 said:

Well , the OP's been hiding in shame , I wonder if the bike was still rolling when he heard this chain sound.    ?

Not hiding in shame. Just busy with life.

 

the bike was sitting. Kickstand down. In neutral. I killed the engine and something inside kept moving. Sounded like a wet chain going around and around a gear. My first thought was something like a timing chain still spinning. Lasted for 5 seconds or more.

Waited a few minutes. It was bugging me. So went and started it again. Still in neutral. Waited couple min. Shut down. No sound.

just had the engine rebuilt by a reputable shop. Spend a few grand getting the bike up to speed. Now this. ?

[ss-racing66]

If it's indeed mechanical, the possibilities are pretty limited . I'd be looking at the alternator, or the starter motor.

 

[XR650L_Dave]

If it kicked backwards hard right at shut-off could part of the starter clutch assembly be set to spinnin'?

 

I think the starter motor can spin for a couple seconds after a hick backwards

Edited October 25, 2018 by XR650L_Dave

[ricardoguitars]

Check the starting button, mine got stuck sometimes causing a similar noise, I had to loosen the housing bolts a bit so the button could return free.

[WvChamp]

+1 on the starter motor (switch) stuck.

 

[RacerAV]

Kick start only! No start button. It’s an 01 XR650R.

[EarthCruzn]

No more noise??

Sure it was not a liquid sound........... Check the oil and coolant.

 

[RacerAV]

Nah definitely more mechanical.