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Koch’s Performance
Parts Sales & Service
About Us
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Vintage Yamaha Snowmobiles
Restoration
Finding a Winning Sled
433cc Yamaha Engine
1972 Yamaha SR 643
1972 Yamaha SR 433B
1975 Yamaha GPX 338
1972 Yamaha SR 292
Legacy Racing Photos
Restoration Parts
Belly Pans
Bumpers
Cables
Carburetors
Crankshafts
Gas Tanks
Graphics
Handle Bars
Hoods
Pistons
Seats
Skis
Sno Flaps
Switchs
Tunnels
Water Pumps
Koch’s Performance
Parts Sales & Service
About Us
Testimonials
Contact Us
Vintage Yamaha Snowmobiles
Restoration
Finding a Winning Sled
433cc Yamaha Engine
1972 Yamaha SR 643
1972 Yamaha SR 433B
1975 Yamaha GPX 338
1972 Yamaha SR 292
Legacy Racing Photos
Restoration Parts
Belly Pans
Bumpers
Cables
Carburetors
Crankshafts
Gas Tanks
Graphics
Handle Bars
Hoods
Pistons
Seats
Skis
Sno Flaps
Switchs
Tunnels
Water Pumps
1976 SRX 340 Wiseco Piston
1976 SRX 340 Wiseco Piston Kit
available in std. .020 .040 and .060 sizes
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Koch’s Performance
Parts Sales & Service
Yamaha Snowmobiles
Restoration
Restoration Parts
Legacy Racing Photos
About Us
Testimonials
Contact Us
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