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!
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.
BETA 2-Stroke Models
Years
Size
Piston Kit 56-W9850
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
RR 50 Enduro RR 125 Enduro RR 250 Enduro
2005 - 16 40.3mm 2018 - 25 54mm 2013 - 21 66.4mm 2018 - 21 66.4mm 2013 - 17 72mm 2018 - 21 72mm 2021 - 25 72mm 2015 - 17 72mm 2018 - 21 72mm
.130.PX
–
.PX .PX
.PROX
56-0166 56-0174
56-6306
.A.PX
.PX .PX .PX .PX .PX .PX .PX
.PX
.PROX
56-W035
56-R1223 56-R1200 56-R1200 56-R1201 56-R1201 56-R1201 56-R1201
56-783
56-800
.A.PX .A.PX .A.PX .A.PX .A.PX .A.PX .A.PX
.PR .PR
.PX .PX .PX .PX .PX .PX
.PROX .PROX .PROX .PROX .PROX .PROX
56-W9857 56-W9857 56-W9817 56-W6723 56-W6723 56-W9817 56-W6723
56-7924 56-7924
56-0181 56-0181 56-0181 56-0181 56-0181 56-0181
56-8020 56-8020 56-8020 56-8020 56-8020 56-8020
Xtrainer 250
RR 300 Enduro RR 300 Enduro
– – – – –
RX 300
Xtrainer 300 Xtrainer 300
–
–
–
BETA 4-Stroke Models
Years
Size
Piston Kit
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
RR 250 Enduro (+2mm Oversize) RR 350 Enduro (Std. Comp. 12.9:1) RR 350 Enduro (Std. Comp. 13.2:1) RR 390 Enduro (Std. Comp. 12.5:1) RR 400 Enduro (Std. Comp. 12.4:1) RR 430 Enduro (Comp. 11.9:1)
2005 - 07 77mm 2011 - 14 88mm 2015 - 26 88mm 2015 - 26 88mm 2010 - 14 95mm 2015 - 26 95mm 2005 - 09 89mm 2005 - 09 89mm 2010 - 14 95mm 2015 - 26 100mm 2012 - 14 100mm 2010 - 11 100mm 2005 - 09 95mm 2005 - 09 95mm
_200.PX
–
–
.PX .PX .PX
– – – – – – – – – – – – – –
56-W029
56-0189 56-0181 56-0181
.A.PX .A.PX .A.PX .A.PX .A.PX
.PX
.PR .PR
56-W9818 56-W9835 56-W9846 56-W9819 56-W9887 56-W178
56-R1202
56-0725 56-0725
.PX
.PR
.PX
56-R1203
56-7970
56-0187
RR 450 Enduro (Std. Comp.)
.A.PX
.PX .PX .PX .PX .PX .PX .PX
.PR .PR .PR
.PX .PX .PX .PX .PX .PX .PX
56-R1204 56-R1204 56-R1203 56-R1205 56-R1205 56-R1206 56-R1206
56-7967 56-7967 56-7970 56-7970 56-7970 56-7958 56-7958
56-0187 56-0187 56-0187 56-0187 56-0187 56-0187 56-0187
(High Comp.)
.B.PX.HI
56-W178
RR 450 Enduro (Std. Comp. 12.0:1) RR 480 Enduro (Std. Comp. 11.9:1) RR 498 Enduro (Std. Comp. 12.0:1) RR 520 Enduro (Std. Comp. 12.0:1)
.A.PX .A.PX .A.PX .A.PX .A.PX
56-W9820 56-W6724 56-W9821 56-W9821 56-W4731
.PR .PR
RR 525 Enduro (Std. Comp.) RR 525 Enduro (High Comp.)
+00B.PX
56-W216
*Please visit our website for current prices E2
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
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