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Top End Rebuild


badbonz

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first thing you want to do is get a compression checker and check your compression. Anything around 100-105 your ready for a rebuild (depending on elevation). Or a variance of 5-10 lbs of difference between cylinders.

 

Next thing to do is get a clymers manual. Its not very hard to do. Only thing I needed the manual for is torque specifications and specifications for movement of the rod and crank separation to make sure everything was still in check.

 

Its pretty straight forward, pull the pipes, carb, coolant lines (dont forget the little bolts in the cylinder sides to empty coolant) carbs, head and pull the cylinders off. Pull the intake and reedcages off too. Go have a machinist mic them for what size pistons you should get, buy the pistons (get a kit for everything, its cheaper) then take the pistons and cylinders back to the machinist so he can bore the cylinders to the specs of the rings that come with the pistons.

 

Pull the pistons off the rods (put a rag down in the bottom end so you dont lose anything down there), put the new pistons, wrist pin, wristpin bearings on and put it all back together.

 

Theres tons of information on here about the process, what kits to buy, where to buy the kit, just do some searching on here, its been discussed pretty well recently.

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