Are the CB77 and CL77 crankshaft and rods the same? Cn aI swap a CL77 crankshaft assembly into my CB77 engine?
Thanks,
John
Crankshaft question
Re: Crankshaft questionNO! Although they look the same when you look at the tapered end near the drift key slot of the CB72/77 crank you will see a small hole which allows oil to get to the starter sprocket. The CL72/77 crank doesn't have that hole. ......................lm
I just made a hole in one. It was a bitch, it took hours of work with a dremel. They sell this blue/green stone made for sharping chainsaws, that's the stone that worked best. The hole is a little bigger, I don't think it matters. I too had a cl crank that I wanted electric start on my cb. If you have alot of free time and a dremel go for it! It's about 5/16", deep before you grind through.
I too had a perfect condition cl crank, that I wanted to electric start my cb. The inside of the crank shaft is hollow in that area, you just have to get a hole in it. The shaft is extreemly hard. Dremell sells the long, thin grinding stones, for sharping chainsaws. They are too large to start with, so I spun them up against the side of my bench grinding wheel, to first make them smaller, and also point it. The hole turns out about 1/8" in size, I don't think it will matter. The grinding takes a long time, I started on sat, went to sun, then got more stones, and broke through on mon . The last stones I found (chain style), worked much better than the ones I was using on sat and sun. The way I saw it was, nothing ventured, nothing gained, and it worked! I will also say, their was no HEAT at all during the grinding, not even a spark from the stones. I wraped zip ties on the center bearings to keep them from sliding around, then just wraped the whole assy in plastic bag, to keep it clean. the right hand bearing was removed. Once done I CAREFULLY flushed the hole, their was almost nothing on the inside, because untill you brake through ,all the stuff comes out the hole your making.
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