$610 Cdn. included "brokerage charges and duty"! The pistons have triangular welding on the exhaust side below the wrist-pin. Since my engine is apart I can slide the old pistons in and see what the problem is. The welded pistons corrects this.
The mechanic who ported my cylinders showed me some dyno sheets on a stock 800 and a modified 800 with JUST this mod done. There was a 12 hp increase. He is a certified Ski-Doo mechanic, who builds race engines, has his own machine shop and Land and Sea dyno. May be hocus pocus but I have seen dyno reports from a trusted source. Only problem is the dyno reports were for a 809 engine. A triple.
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