It sets the compression for pump gas and picks up about 4 HP with a wider power curve and more bottom-end power. It actually would raise the compression a bit too much for pump gas, so we supply two base gaskets raising the cylinder up slightly. TRX250R Cometic 68mm Top-end Gasket Set with CR Style Head Gasket – This is a great little hop up trick for a stock 250R. TRX250R Cometic 68mm Top-end Gasket Set – Note: To be used with stock cylinder ONLY TRX250R Pro-X 250/310/330/350 Top-End Gasket Set – To be used with any CT or Pro-x Cylinder TRX250R CT350 Big Bore Piston Kit – Available in 78mm-79mm bore. TRX250R CT330 Big Bore Piston Kit– Available in 76mm-78mm bore. TRX250R CT310 Big Bore Piston Kit– Available in 72mm-73.50mm bore. TRX250R 295 Big Bore Piston Kit– Available in 72mm-73.50mm bore. ’86 TRX250R Wiseco Piston Kit – Available in 66mm-69.50mm bore. ’86 TRX250R Pro-X Piston Kit – Available in 66mm-68mm bore. Pro-X 350 Ported Power Valve Cylinder Kit– Kit includes CT ported power valve cylinder, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (case machining required) (87-89 long rod cranks require the use of a spacer plate – $45.00 extra).

Pro-X 350 Ported Cylinder Kit – Kit includes CT ported cylinder with Bridged Exhaust, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (case machining required) (87-89 long rod cranks require the use of a spacer plate – $45.00 extra). Pro-X 330 Ported Cylinder Kit– Kit includes CT ported cylinder with Bridged Exhaust, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (case machining required) (87-89 long rod cranks require the use of a spacer plate – $45.00 extra). Pro-X 310 Ported Power Valve Cylinder Kit – Kit includes CT ported cylinder with Bridged Exhaust, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (87-89 long rod cranks require the use of a spacer plate – $45.00 extra). Pro-X 310 Ported Cylinder Kit – Kit includes CT ported cylinder with Bridged Exhaust, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (87-89 long rod cranks require the use of a spacer plate – $45.00 extra). Pro-X 250 Ported Cylinder Kit – Kit includes CT ported cylinder with Bridged Exhaust, interchangeable dome head with choice of dome, piston kit, and top-end gasket set (87-89 long rod cranks require the use of a spacer plate – $45.00 extra). Outerwear Pre-Filter– Fits K&N Air Filter HA-4250. K&N Air Filter – We carry both TRX250R and the ATC250R Filters. Machine Cases for Big Bore Cylinder 330/350ĭura Blue Foam Air Filter – Fits stock airbox. This is the best all around pipe ever made for the ATC250R. ’85-’86 ATC250R Midrange Pipe and Silencer – The midrange pipe produces a very smooth, wide power curve. TRX250R Silencer – Fits all TRX250R pipes TRX250R Power Valve Pipe and Silencer – The PV pipe is a mid to top end pipe, extremely fast on the big end, a great rev duner type pipe, excellent for top-end flat track racing. This is the best all around pipe ever made for the 250R. TRX250R Midrange Pipe and Silencer – The midrange “National” pipe produces a very smooth, wide power curve. Kit Includes: CT Racing port work, cylinder decking, head re-chambering, modified piston kit, cylinder spacer plate, and top end gasket set.ĬT/Pro-X 310cc PV Package…… Starting at $2295.00ĬT/Pro-X 350cc Power Valve Package…… Starting at $2600.00ĬT/Pro-X 370cc Power Valve Package…… Starting at $2750.00 So if you don’t see it here then give us a call or email us.

We offer porting, head mods, crank work, dyno tuning, and even complete motor building services. We also specialize in many performance modifications and services. We carry pistons, rods, reed cages, performance cylinders, heads, clutches, and so much more. If you are looking for performance you have come to the right place! We’ve been racing and modifying the R motor since they were air cooled.

This page is dedicated to TRX250R Parts and Accessories (ATC250R).

1985 honda atc 250r exhaust