All right my fellow racers, I could really use some help. I just bought my first GS500, an 89, currently registered but ďseizedĒ. I opened her up, lost a rod.. destroyed the rod, crank, left piston and cylinder. Iím an old racer so I donít mind the work but Iím new to the GS500ís so Iíve got two questionsÖ
1) "I see a number of posts about broken rods, pistons, cranks.. what is this engines weak point? One of these or all of these? Iím not going to build an all out race bike but I havenít forgotten how to twist the throttle either.. so that means if Iím going to build a motor Iím going to address itís weak points.. what are this engines weak points?Ē
2) what are my parts options (within reason..).
I figure cost wise we're stuck with the stock crank.
But are there better rods? (I called Carillo, couldnít stop laughingÖ 378 a rod..) anything out of another Suzuki or other aftermarket?
Shot Peening the rods was good in the RDís I raced for almost another 1000 rpm without breakage so that may be an option if a better rod is not available.
Pistons, are the stock pistons any good or did my rod just freakishly kill my piston? It pulled the bottom right off..
I didn't see a listing on Wiseco's website.
and without going into the really bigbore (78mm) because it looks like thereís piston issues right now, how big can I go? (If your going to bore a cylinder anyway rightÖ)
Any help is greatly appreciated my fellow racers. Ed