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[Damann]

Show where to male or buy one for $30

 

[Damann]

Why not take everything back apart in an hr, and gasket seal every thing put back together, for free?

 

[Damann]

Then ya know there isn't a leak. But ya know if I do that the mfer still won' start or run.. it's 1989.. honestly doubt the previous life owners ever tore bike down to replace crank seals.. prob got all new shit on trying to run on 29 year old crank seals

 

[Damann]

Yes crossover tube is there and tight

 

[Damann]

I got ya hotrod9193.. about where I'm at.. can't prove that engine is getting the fuel though, can not flood it like I can my other bike.. i know it has spark.. I known it has air.. it start with direct injection.. But with carbs on it will only and barley run with throttle.. problem is not carbs.. I'm 100%.. I switch plug caps, both make same size spark.. But not sure if reeds are letting fuel in.. therefore goes my leak, right????? No bottom end compression to open reeds on strokes.. no reeds open, no fuel into cylinders, no starty.. right? Did that make since?

[hotrod9193]

Ok then just do this...... tare motor completely down... split the cases.... order a COMPLETE gasket and seal kit along with some crank case sealant. Install all new seals, apply sealant to the crank case halfs and reassemble with all new gaskets. No need to apply sealant to gaskets unless you have a fd up case or cylinder. Then come back and let us know what's going on

[Damann]

Question.. So if crank seal are bad??? Would it comprssion test top end right????? Before rebuild it had 95psi but rings and cylinders looked Good? Would crank seals blowing out ruin piston compression??

[hotrod9193]

If you have a crankcase leak it's drawing air in from there as well, so it's getting to much air coming in and not enough fuel..... So when you dump a bunch of fuel on the piston it starts and runs until that fuel burns up, assuming your carbs are 100% and so is your electric then it has to be a crank case leak

[Damann]

Hot9193 I think you've got it

[Damann]

Hotrod, do you know if crank seals are bad will it compression check bad too?

[hoppedupandcutdown]

Have you...

pulled the fuel hose off carb, turned on petcock and verified fuel flow?

Loosened bowl drain to verify fuel flow?

If yes, try holding a piece of cardboard over both carbs without the filters and see if it starts

[hotrod9193]

Compression test is completely different from pressure test.... Compression is what pressure is in your cylinder above your piston when it makes a stroke.

Pressure testing or leak down testing tests the crank case ( under your piston )

[Damann]

I bet that is why the dude thought it was burnt up. It smoked and only had 95psi when I bought it.. But after tare down cylinders weren't that bad to only have 95psi.. so I bet if i go compression check that bitch, it probably still has around 100psi on new top end, because crank seal is leaking.. right?

[Damann]

So it's looking like pulling the motor and splitting cases is in my future.. thanks yaw, I'll let ya know what I find on compression check with new top end on it tomorrow

[hotrod9193]

Yes you can have perfect compression and still have a leaking case. He probably burnt the top end up because the case had a leak and he was running lean....