This ad is for the servicing of your Yfz 450 crankshaft. Whether you just want it inspected or fully rebuilt with a new rod, trued and welded we can help. Checking your crankshaft for trueness is a very important task when building a good performing engine. The crankshaft is the heart of the engine and should be cared for as such. Send us a message today for your single cylinder crankshaft rebuilding.