J-Madd Posted August 11, 2009 Report Posted August 11, 2009 This is for the cylinders, pistons, and crank only. Cylinders have some porting, with the transfers opened up, and exhaust widened. Has ran multiple low 4.20s in 300ft with a 200 lb rider on a stock chassis. It is a running engine at the moment. The pistons have a fair amount of time on them. It was re-ringed 2 years ago, but I don't take it to many races; and it is not ran at all in the winter. I am upgrading this engine to a 421. Pics in a couple of days. Quote
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