Crf150r timing chain

Crf150r timing chain falls off crankshaft sprocket after a minute of idling .. can someone help me out?

Crf150r timing chain falls off crankshaft sprocket after a minute of idling .. can someone help me out?

Oh snap!  Did you bent any valves?

No thank god

No thank god

How do you know it's not bent when you haven't put the chain back on and run it or check for compression?  Did you take out the head?

 

And what kind of help are you exactly looking for?  How to put the chain back on and time it?

The piston stop at the bottom of the engine

The piston stop at the bottom of the engine

The piston is not the part of the engine that stops suddenly when a timing chain fails, it's the top end of the motor that does that....... the valves, cams, etc.

 

So it probably smacked the valves a few times before you were able to cut out the motor and slow the pistons to a stop.

Edited by Cute2strokeBoy

Ok I'll check tomorrow. . But what cause the chain to fall off

It being to loose

Found the problem. .. The mechanic put the washer in front of the chain guide when it is suppose to be to the back .. so the chain twisted to the back and jammed the engine

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