The tear down (part 2)
I figured it would be best to do the engine rebuild before the chassis rebuild (as there wouldn’t be so many parts floating around). Plus – engines are a bit more fun in my mind.
Given the age of the bike (and because it was running a bit wonky when I purchased it…the left cylinder wouldn’t fire unless I had my hand over the carb), I decided to completely tear the engine down. I was concerned that those old two-stroke crank seals were the likely culprit.
After receiving the crank seals and lower rod bearings, I brought the crankshaft and cylinders up to Bill Bune enterprises in Anoka MN to be rebuilt (the cylinders were just re-honed, as I installed new rings on the pistons…at 3500 miles, there wouldn’t be a need to bore the cylinders).
Here are a number of pictures of the whole process. This engine is fairly simple – and thus I had no “gotcha” moments (other than a stuck stator rotor):
My makeshift bench to hold the engine parts (used the cardboard trick below to know how the bolts go back into the right place):
The stuck rotor…it finally came off after some WD-40 soaked the shaft for a few hours: