[80 J-10]

Well it looks like I am going to have to rebuild my motor, must have gotten water in it on the last ride. The mechanic said the crank bearings went out, said this is a common problem with these bikes. Anybody ever heard of this?

 

[Honda Mechanic]

If water gets in the air filter it will wear out the piston and bike will smoke ..

 

[80 J-10]

The funny thing is it didnt smoke, it started rattling and then knocking. Of course as soon as I unloaded it at the shop it started smoking.

 

[hookedonjuice]

just got through putting a crank in a 2001 450s for the same thing, the rod was loose and knocking.

 

[cajunforeman]

I had the same problem with mine. It was knocking really bad but mine never started smoking. It cost me about $1300.00 to fix it but they re-built the whole engine and replaced the connecting rod.

 

[80 J-10]

Yep, that is what I am doing, going to have the whole engine rebuilt, so I guess it is a problem then.

 

[AkATVHunter]

No offense but when you ride it deep water that stuff is going to happen so yes, the mechanic was right. It is not a common problem for those people who ride theirs on trails and such, but 9 outta 10 people that have engine problems is usually caused from water.