Davenjw

I pulled the head off an engine that I was told had a fairly new top end, I found that the bore was at 77.3mm. the pistons say 1.50mm on them.

compression was at around 180... I think the head is milled, honestly I can't tell. hone marks looked very professional and were a very good X

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My ski:

1986 Kawi X-2

750 fresh, blaster chamber, 46mm sbn, aluminum fuel tank, supertrapp waterbox, full steering mods, etc.

milesinfront

Factory specs are:-
Standard Bore - 76.050 - 76.065mm
Piston 2 Bore Clearence - 0.084 - 0.094m

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---1987 X-2 No. 100435---

Max:- 47.2mph

650 Engine:- Prok Q.R. F.A., 1 x 44SBN, PJS Inlet Manifold, Reed Stuffers, Carbon Reeds, Wiseco Rods & Pistons, Ported Cylinders, 170psi, MSD Total Loss, Jetsport Exhaust Manifold, Coffman Pipe, MSD Water Injection, DG Water Box.

Hull:- Metallic Green Paint, Tubbies, Rear Exhaust, Stainless Bumper, Accu-Steering, No.6 Skat & PJS Big Bore Nozzle, Dual Cooling, ShredMaster Rideplate/Grate.

http://www.youtube.com/profile?user=milesinfront#g/u

crab

Just run it, without a professional bore guage and caliper you cannot accuratly tell what the clearance is set at. Wiseco pistons require more clearance than oem type pistons or they will sieze, and need to be warmed up before hammering on it. Your at 3 sizes above stock at 1.5 over or

Displacement: 660ccBore - Standard: 76.00mmBore - Actual: 77.50mmBore - Oversize: 1.50mmStroke: 64.9mmCylinders: 2

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