Piston Kits
ProX
ProX Piston Kits ProX pistons are precision machined on the latest, state of the art CNC equipment. The same low-expansion, low-friction piston alloy is used as is used for all major Japanese engine manufacturers. ProX piston kits are a first class solution to replace the original piston in your motorcycle. ProX piston kits for sleeved cylinders are available in standard size and a wide range of over sizes. ProX pistons for plated cylinders come in standard size, A, B, C, D & over sizes. All ProX piston kits are supplied complete with piston rings, wrist pin and circlips, ready to install!
HONDA 2-Stroke Models
Years
Size
Piston Kit 56-W9925 56-W041
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
QR 50
All
.075.PX
–
–
–
–
40.75mm
CR 80 (79cc) CR 80 (82cc)
1986 - 02 46mm 1986 - 02 47mm 2003 - 07 47.5mm 1988 - 91 54mm 1992 - 03 54mm
.PX
.PX
.PR .PR .PR
.PX .PX .PX .PX .PX .PX .PX .PX
.PROX .PROX
56-R1210 56-R1211 56-R1212
56-7930 56-7930 56-7930 56-722 56-722 56-722 56-722
56-0170 56-0170 56-0170 56-0174 56-0174 56-0174 56-0174 56-0176
56-821 56-821
.B.PX .B.PX
.PX
56-W643 56-W833 56-W564 56-W676 56-W840 56-W859 56-W905 56-W614 56-W702 56-W801 56-W860 56-W636 56-W636
CR 85 CR 125 CR 125 CR 125 CR 125 MTX 125 CR 250 CR 250 CR 250 CR 250 CR 480 CR 500
.PX
–
+P0.PX
–
.PR .PR .PR .PR
.PROX .PROX .PROX .PROX
56-8142 56-8142 56-8142 56-8142 56-6373 56-6373 56-6373 56-6373
.A.PX
.PX .PX .00
56-R1239 56-R1240 56-R1213
2004
54mm
+00A.PX
2005 - 07 54mm 1988 - 90 56mm 1986 - 96 66.4mm 1997 - 01 66.4mm 2002 - 04 66.4mm 2005 - 07 66.4mm 1982 - 83 89mm 1982 - 01 89mm
.A.PX .B.PX .A.PX .A.PX
–
–
–
.00 .00 .00 .00 .PX .PX
.PR .PR .PR .PR
.PX .PX .PX .PX
.PROX .PROX .PROX .PROX
56-R1215 56-R1215 56-R1215 56-R1216 56-R1222 56-R1222
56-7924 56-7924 56-7924 56-7924
56-0181 56-0181 56-0181 56-0181
+00A.PX +00A.PX .000.PX .000.PX
–
–
–
.PR
.PX
.PROX
56-0738
56-0187
56-7999
ProX 2-Stroke Piston Kits
• ProX pistons are manufactured by the same factories in Japan that supply the OEMs. This ensures OEM quality but allows ProX to make improvements upon OEM designs when needed. • The majority of ProX 2-stroke pistons are cast from aluminum containing approximately 18% silicon. This material and manufacturing combination reduces thermal expansion, allowing pistons to be run at tighter tolerances and reducing wear. • ProX adds additional performance features to piston designs where they feel necessary. For example, some 2-stroke pistons will have wrist pin oiling holes drilled in the bottom of the pin towers. • A quality piston’s performance is only as good as the components it uses. ProX 2-stroke pistons come with OEM quality, Japanese rings to ensure durabilty and performance is consistent throughout the entire piston package.
ProX 4-Stroke Piston Kits
• ProX 4-stroke pistons for performance applications are forged, while others are cast. Because most motorcycle and ATV applications are high performance, the majority of ProX 4-stroke pistons are forged. • When treated properly, 4032 alloy offers greater strength and more wear resistance thanks to reduced thermal expansion and increased hardness. • ProX 4-stroke pistons’ alloy reduces the chances of microwelding in the ring grooves thanks to the additional hardness. • ProX pistons are designed and manufactured to OEM specifications at a minimum. Some designs are improved upon based on market need or an OEM weak point. • ProX only uses rings that come from reputable Japanese OE suppliers. A piston is only as good as its ring pack. • ProX 4-stroke piston kits include the piston, rings, wrist pin, and wire locks. They are available for a wide range of applications
*Please visit our website for current prices
E4
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
Made with FlippingBook - Online magazine maker