Crankcase Issue

[shane.ballard.nf]

On my YZ490J just behind the magnesium crankcase cover where the kickstarter is it looks like its welded but there is also a black puddy type of stuff on it.

This bike has a jetting problem and the case has to be removed to make sure tranny oil is not gettin through a bad seal and into the motor through the crankcase causing a rich mixture, before i can attempt to jet the bike.

I'm afraid i may run into problems since there is like a black puddy around the top of the kickstarter casing and welding on the back of it, maybe JB weld, can the case still be removed?

The magneto side of the crankcase is fine, no welding or cracks.

the bottom of the engine needs to be took apart so i can find out what needs repairs such as crank seals or bearings, i beleave the topend of the engine is fine

 

[j32]

sounds like jb weld
i hate jb weld it is glue!!
if your going to tear it down do it right!!!
the seals arent that much,i use shellac on the gaskets
that way i know the center gasket seals its not hard to clean'
and it really works
you can always put new jb weld on it.but i would replace if possible ,because of safty!! ,it is glue and can come off
it just depends on what it is on there for-good luck

 

[shane.ballard.nf]

ok kewl, as long as it can be removed, if necessary could always jb it up again since i aint got money for a new cover