CalgaryStreetBob
XS400 Member
1981-82 XS400 SOC Canadian version
the motor is out of the bike
THE PROBLEM IS
When I try to turn the motor to set top dead center I can not turn the crank shaft over.
I noticed the problem after I re-torqued all the bolts.
When I torqued all the bottom 6 12mm (socket) bolts to 20 ft lbs the engine seems to be too tight to rotate the engine.
HERE IS WHAT I HAVE DONE TO THE ENGINE
I have the engine out of the bike.
I just finished a full rebuild of the motor.
Complete tear down and build up.
The bottom of the original block was cracked where the kick start goes in.
So I got a new bottom end to the case.
I replaced all the original transmission parts into the new bottom end.
lots of lube and everything is turning properly.
Put both parts of the case together. clutches and alternator parts in.
engine turned no problem.
Torqued all bolts to spec. "I can not turn the motor over."
If I loosen the bottom 6 bolts the motor turns over. no problem
the case seems to be squeezing the main crank shaft too much.
I changed a few bearings
new clutch plates.
new gaskets
new piston rings
the motor is out of the bike
THE PROBLEM IS
When I try to turn the motor to set top dead center I can not turn the crank shaft over.
I noticed the problem after I re-torqued all the bolts.
When I torqued all the bottom 6 12mm (socket) bolts to 20 ft lbs the engine seems to be too tight to rotate the engine.
HERE IS WHAT I HAVE DONE TO THE ENGINE
I have the engine out of the bike.
I just finished a full rebuild of the motor.
Complete tear down and build up.
The bottom of the original block was cracked where the kick start goes in.
So I got a new bottom end to the case.
I replaced all the original transmission parts into the new bottom end.
lots of lube and everything is turning properly.
Put both parts of the case together. clutches and alternator parts in.
engine turned no problem.
Torqued all bolts to spec. "I can not turn the motor over."
If I loosen the bottom 6 bolts the motor turns over. no problem
the case seems to be squeezing the main crank shaft too much.
I changed a few bearings
new clutch plates.
new gaskets
new piston rings
Attachments
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