thrillseeker
Been Around the Block
Hi all. I have this CB360 that I'm rebuilding and converting to the infamous PJ378. I got my head and cylinder work done by a really good local machinist who has specialized in motorcycle head/cylinder work for about 30 years and works on a LOT of old bikes. Since we just did all this work on the top end, when I went to pick up the head and cylinders, I brought my crankshaft so he could look it over quick to make sure it is in good working order. While taking measurements, he noticed that the rod-pin clearance was a little too high. 0.003in to be exact. He recommended that I not use it in that condition and suggested I call Falicon to see if they could repair it. After talking to a rep at Falicon, they can repair it but it would be a full crankshaft rebuild. They would take the crank apart, inspect everything, machine the pin openings to be larger, and press in bushings to fit the pins. I really like the idea of having this done because then I have the piece of mind knowing my crankshaft is in good shape and is going to last. The cost for that service is about $500 though. But I'd rather spend $500 to have that done than buy a crankshaft on ebay and risk a problem down the road, potentially ruining all the work I just had done on the top end. The other thing I'm considering is having it balanced. If they're already rebuilding the crank, its an extra $200 for the dynamic balance. They balance for the pistons I'm using so I'd send the crank, pistons, and pins. Since I'm using the lighter GS850 pistons I'm thinking maybe this would also be a worth while investment.
I understand the basic benefits of balancing the crank but, for this motor, is it worth while to spend the extra $ to get the crankshaft balanced while it's already being worked on? Does anyone here have experience with having their 360 or similar crank balanced? What should I expect if I do or do not balance? This is my first rebuild so I'm open to any suggestions. Thanks everyone.
I understand the basic benefits of balancing the crank but, for this motor, is it worth while to spend the extra $ to get the crankshaft balanced while it's already being worked on? Does anyone here have experience with having their 360 or similar crank balanced? What should I expect if I do or do not balance? This is my first rebuild so I'm open to any suggestions. Thanks everyone.