VHM Piston kit Honda RS125 NX4 1995 - 2010 / RS250 NX5 & NXA 1993 - 2010 Ø53.94 (Ø15 piston pin)

VHM pistons are 100% CNC machined from high quality material and have a non-circular profile to better prevent engine lockups. They stand for high performance, longevity and keeping high performance during it's lifetime. This piston consists of an inside coating, which reduces micro welding, lowers the friction on the pin, prevents piston bore galling and provides a very good thermal conduction. Furthermore, this piston includes special Z-clips, which prevents the clips from circling and affecting the groove.

[24-07-2019] update piston: We made an extra radius in the ring groove at the exhaust side to help prevent the piston ring from locking.

High performance
Direct replacement
Inside coating and special Z-clips
Longevity
Keeps high performance during lifetime
This piston needs a clearance of 0.07mm! [24-07-2019 Improved piston ring groove, helps prevent piston ring locking




Specifications
Part number
APHO12521708B
Diameter
Ø53.94
Version
Direct replacement
Piston crown shape
Dome
Bore size
Ø54
Piston pin
Ø15
Stroke
2T
Coating
Yes
Piston-cylinder clearance [mm]
0.07
Piston ring end gap [mm]
0.25+0.10
Applications
Application
Make
Model
Year
Roadrace
Honda
RS125 NX4
1995-2010
Roadrace
Honda
RS250 NX5
1993-2000
Roadrace
Honda
RS250 NXA
2001-2010