Port Work Pricing

Prices include: reed mods, piston mods, matching carb boot & exhaust flange(s). Balancing pistons if twin or triple. Reed Spacers & Head Work are extra.

Small cylinders 50cc - 125cc ='s $125.00 to 160.00
Stokers are extra due to lowering the bottom of transfer ports.

200cc's and up $175.00 to $225.00 includes matching PV's.
Cutting PV's for Big Bore is extra.

All big bore port work with plated cylinders is done before the cylinders are plated. Then cleaned after plating. This maintains the warranty from Millennium Technologies, U.S. Chrome, Langcourt Ltd, etc.

Crankcase Porting: Twins ='s $100.00 Triples ='s $150.00
Exception is Rotax Rotary Valve 670 to 670X ='s $150.00
and Arctic Cat 700 Wildcat / ZR ='s $150.00

Piston Window mods available. Your design or ours.

Please contact us for a specific quote on your engine. Racing, or Recreational riding, you choose!

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Yamaha Watercraft: 1200 GPR (66V), 1300 GPR (60T) & (60T10 - non PV) ='s $190.00 per cylinder to 1390cc's Power Valve cutting and Stroker's are extra.

Head CNC work for 1200 & 1300 GPR's is $190.00 each. Some exchange heads are available.

GPR Crankcase porting is $150.00 includes filling intake grooves below reed assembly.

Supply and bore OEM Yamaha head gaskets to 87mm and larger $90.00

Cut cylinder base on lathe for squish clearance and match cylinder height. ='s $35.00 each.

GPR / VF-3 Gaskets - rubber coated metal core ='s $6.00 each - 6 required.

GPR Big Bores 88mm and larger require welding & lathe work before being bored.

Piston kits available: Yamaha OEM, Pro-X, Wiseco

GPR Engine Pressure test kits; I-Body carb & Protec ='s $95.00 / EFI w/plugs ='s $110.00

Cooling system pressure relief valve (25 psi) for Stock cooling $75.00

Yamaha OEM Gaskets, Seals, Pins, Rings, Bearings etc. available.