Piston Kits
Vertex
Vertex Piston Kits - 2 Stroke As the OE supplier of 2-stroke pistons to KTM, VERTEX pistons has an outstanding reputation for quality and performance. Each gravtiy cast piston is created with only premium aluminium alloys utilizing an 12-21% silicon content. The silicon content in VERTEX pistons is crucial to the quality of the piston - it’s critical in decreasing thermal expansion which, when an engine reaches normal operating temperatures, can change the geometry of the piston. Controlling this expansion means VERTEX pistons can be run at tighter tolerances for more power, less noise and a longer lifespan of the piston. Vertex Piston Kits - 4 Stroke When it comes to power and perforance, VERTEX 4 stroke pistons are hard to beat. Forged to the highest quality 2618 aluminium alloy, VERTEX pistons are perfectly suited to handle the rigors and high pressures of todays modern 4-stroke engines. To aid in the break-in process, and reduce wear, VERTEX pistons utilizes a unique Molybdenum Disulphide (MOS2) coating on the piston skirt. What really sets VERTEX pistons apart from the competition are the unique piston profiles and compression ratios that are offered in A, B, C and D sizes. This variation in the sizing, a mere 0.004”, allows the piston to be perfectly sized to the cylinder for maximizing power and performance while reducing blow-by oil consumption.
KTM Models - 2 Stroke
Piston Type Years Size
Piston Kit
Piston Rings
Piston Pin
Piston Clips
Small End Bearing
EXC 50 EXC 50
1994 - 97 39.5mm 1998 - 00 39.5mm 2001 - 08 39.5mm 2009 - 26 39.5mm 1997 - 99 43.5mm 2000 - 08 45mm
.V .V .V .V .V .V .V .V .V .V .V .V
715036 715036 715036 715036 715332 715332 715047 715332 715332 715332 715378 711119 715378 715378 711151 711151 711151 711127 711127 711127 711127 711127 715389 711127 711127 711127 711127 711127 715389 711127 711127 711127 711127 715389 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127 711127
22171A
56-R9030 56-R9030 56-R9403 56-R9403 56-R9421 56-R9404 56-R9339 56-R9404 56-R9404 56-R9404 56-R9339 56-R9339
72065 72025 72065 72065 72065 72065 72065 72065 72065 72065 72050 72050 72050 72050 72050 72050 72050 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071 72071
22525AB 22813AB 23429AB
SX 50 SX 50 SX 60 SX 65
. VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX
56-838 56-838 56-827 56-827 56-827 56-827 56-827 56-827 56-7997 56-7997 56-7997 56-7997 56-7997 56-7997 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800 56-800
22402A
22481AB
SX 65 (Big Bore)
2000 - 08 47mm 22858200
2009 - 26 45mm
SX 65 SX 65
22295A 22293A 23879A 22991A 24280A 23430AB 24447AB 24678AB 24212A 24279A 24446A 24355A 22361A 22532A 23928A 24243A 24445A 24427A 24520A 24419A 23384400
Race Evolution 2009 - 26 45mm
2009 - 26 45mm 2003 - 26 47mm 2003 - 26 47mm
SX 65 12⁰ Head
Race
SX-EXC 85
. VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX
SX-EXC 85 Flat Head
Race
Race Evolution 2003 - 26 47mm
SX-EXC 85 Single Ring 0,8
53008004700
2003 - 26 47mm 2004 - 11 52mm 2004 - 11 52mm 2003 - 16 52mm 1987 - 93 54.25 1987 - 93 54.25 1994 - 97 54.25 1998 - 00 54.25 2001 - 16 54mm 2001 - 16 54mm
SX-EXC 85 12⁰ Head
Race
.V .V .V .V
56-R9339 56-R9422 56-R9422 56-R9422
SX 105
SX 105 FlatHead (testa piatta)
Race
SX 112 Cast Stroker SX-GS 125 Dome SX-GS 125 Flat Head
.V
56-R901
53010005242
EXC 125 EXC 125 EXC 125
.V .V
56-R901 56-R901
. VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX . VERTEX
.V x2
56-R9307 56-R9331 56-R9350 56-R9307 56-R9307 56-R9307 56-R9424
EXC 125 Single Ring EXC 125 Single Ring 0,8
Race
.V
Race Evolution 2001 - 16 54mm
. VERTEX
EXC 125 12⁰ Head - Single Ring
Race Race
2001 - 16 54mm 2001 - 16 54mm 2001 - 16 54mm 2007 - 16 58mm 1994 - 97 54.25mm 1998 - 00 54.25mm 2001 - 26 54mm 2001 - 26 54mm
.V
.V x2
EXC 125 12⁰ Head EXC 125 Single Ring EXC 125 Big Bore
Pro Race
.V .V
SX 125 SX 125 SX 125
.V .V
22361A 22532A 23928A 24243A 24445A 24427A 24520A 24419A
56-R901 56-R901
.V x2
56-R9307 56-R9331
SX 125 Single Ring SX 125 Single Ring 0,8
Race
.V
Race Evolution 2001 - 26 54mm
56507805400
2001 - 26 54mm 2001 - 26 54mm 2001 - 26 54mm 2007 - 17 58mm 2017 - 19 54mm 2017 - 19 54mm
SX 125 12⁰ Head - Single Ring
Race Race
.V
56-R9307 56-R9307 56-R9307 56-R9424 56-R9307 56-R9331
.V x2
SX 125 12⁰ Head SX 125 Single Ring SX 125 (Big Bore)
Pro Race
.V .V
23384400
.V x2
XC-W 125
23928A 24243A 24445A 24427A 24520A 24419A
XC-W 125 Single Ring XC-W 125 Single Ring 0,8
Race
.V
Race Evolution 2017 - 19 54mm
56507805400
XC-W 125 12⁰ Head - Single Ring
Race Race
2017 - 19 54mm 2017 - 19 54mm 2017 - 19 54mm
.V
56-R9307 56-R9307 56-R9307 56-R9424 56-R9307 56-R9331
.V x2
XC-W 125 12⁰ Head XC-W 125 Single Ring XC-W 125 Big Bore
Pro Race
.V .V
2017
58mm
23384400
2025 - 26 54mm 2025 - 26 54mm
.V x2
XC-W 125
23928A 24243A 24445A 24427A 24520A 24419A
XC-W 125 Single Ring XC-W 125 Single Ring 0,8
Race
.V
Race Evolution 2025 - 26 54mm
56507805400
2025 - 26 54mm 2025 - 26 54mm 2025 - 26 54mm
XC-W 125 12⁰ Head - Single Ring
Race Race
.V
56-R9307 56-R9307 56-R9307
.V x2
XC-W 125 12⁰ Head XC-W 125 Single Ring
Pro Race
.V
*Please visit our website for current prices
* Note; Most Kits are available from standard size up to +2.00mm over size *
www.oro2u.com
Tel: 01597 822 666
Fax: 01597 825 224
E70
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