Has anyone had a suzuki 230 quad lock the engine up?

[docdoug72]

Has anyone had a suzuki 230 quad lock the engine up?  Its a well maintained bike, it locked up when my son was riding it. Pulled the plug, it has connected with the piston. I'm thinking the con rod let go.  I don't have a service manual.  Does the engine need to come out to check further?

[Mech]

You need to keep posting till you can download the service manual; That tells you what work can be done with the engine in place.

If you tell us the year and exactly what model it is, I or someone can check for you.. They come in chain or shaft drive, and with or without electric start, and I wouldn't be surprised if there were kick or pull start versions as well..

We need the suffix of the model number..

[Gwbarm]

Interesting valves should have stopped the piston before it hit the plug did it do anything weird before it stopped running. I would probably pull the cover and inspect the timing chain first, maybe see if it will budge with a wrench on the cranknut, dont go crazy with it just move it back and fourth gently.

[Mech]

Yeah a spanner on the crank will tell us somethings. If the crank is totally seized then it's probably seized the big end bearing, but if it moves a tiny amount it's likely that that play is the crank moving till the conrod tries to move the piston. Draining the oil and inspecting it often shows something too.

Since the spark plug has been hit then it is possible the big end or the gudgeon pin have developed play.

[supremevacuum]

Mine hasnt locked up!

[Mech]

Keep trying...