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  1. REV Chassis - Performance and Trail Models
    Hello all, I'm working on a full rebuild on my 05 summit 800 HO. I'm installing dual ring SPI pistons. I'm to the point of installing my piston rings. The rings have obvious markings indicating the top side. The problem is that one ring says PJ21E, and the other says PJ21F for both ring kits...
  2. Mach Z / Mach 1 / Formula III Triples
    got my pistons in the mail the day before thanksgiving and last night we finaly got them put in-sled sounds awsome! love the sound of the tripple tripple.. this is the first motor ive had that has been rebuilt.and i dont want to mess it up costing more time and money! is there anything special...
  3. MXZ / Legend / Summit / Grand Touring / Formula
    Hi does anyone have any input on SPI pistons? seen a great deal online with pistons,rings,circlips, needle bearings and a winderosa gasket set. Or does anyone have a suggestion or any good stories about other piston companies? thanks everyone
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