Honda Pistons - RS125 and RS 250
installing tool. You will want one of these!
No more wrist-pin woes!
C-Clipper install wrist-pin clips in seconds
CLICK HERE for more information
For some basic information on installation
of pistons and rings and notes on our
findings on the RS250 piston/ring failures. CLICK HERE
Wossner - High
all are aware Honda OEM pistons for our
2-stroke GP machines have doubled in price
and then doubled again and some racers have
had issues with the new OEM pistons
especially in the RS250 Honda. We have been
looking for a solution.
Wössner manufacturers German engineered high
quality forged pistons for 2-stroke and
4-stroke competition engines. Piston kits
which include rings, clips, and pin.
4-stroke pistons are supplied
with custom DLC (Diamond-Like Carbon) coated
wrist pins, providing anti-friction, high
Honda RS125 and
Wossner Honda RS125 GP Domed top 53.94mm
These pistons now
only available with the WPC-TREATMENT
- Metal Surface treatment that we started having done
on our Wossner Pistons. Yamaha has been having this done
to all there TZ pistons since 2003
Wossner Honda RS125 GP Domed top 53.95mm
Wossner Honda RS125 GP Domed top 53.96mm
Wossner Honda RS125 GP Flat top 53.94mm
Wossner Honda RS125 GP Ringset 54.00 X 0.8mm
We have received
positive results form these pistons installed in
both the RS125 and RS250 Honda machines.
For install of coated piston it has been recommended to lightly red
Scotch Brite the pistons skirt in a cross hatch,
properly dress ring groove, measure end gap,
clean and assemble. Properly warm up engine at low
RPMs for 2 heat cycles and always be sure motor is
completely warmed before heading out to the track
and properly setup either with duct tape or a
thermostat system to stay at proper operating
Honda CRF250 & CRF250X
Wossner Honda CRF250 &
CRF250X 13.5:1 '06- "09, 77.95mm #8656DA Piston kit
(rings- 780XAS, PIN- WP959, CLIP- CW16)
For all those racers that have been
Domed Top "A" pistons for your 125 motor!
Honda RS125 new dome piston are now available with
0.8mm flat piston ring.
The position pin is in the middle.
Piston kit includes a ring, ris
pin and circlips.
23105A Honda RS-GP95-97 125cc D.
53.94mm (02V) Piston w/ring (53007805400),
pin (711127) and clips
|VHM Solid Billet Piston for Honda RS125/RS250
many years of experience in research and design in 2
stroke piston, has lead us in the development and
manufacturing of piston machined from a solid billet
material. This gives us the great possibility to
change quickly to any shape. Other improved material
properties can be tested quickly without high cost
and we have great control over dimensional accuracy.
VHM billet pistons are 100% CNC machined from high
quality solid billet material specially manufactured
according our specifications and material
properties. The piston feature internal and external
machining to unique shapes for an increased
The billet piston are machined on every surface
allowing for all unnecessary weight to be removed.
It can deliver the highest uniformity of material
thickness on skirts and the general body. The piston
features a special skirt shape which will result in
a cylindrical shape during operating temperature
with the optimum clearance for less friction giving
the best performances.
VHM solid billet piston kits come completely with
piston, piston ring, piston pin and clips.
Fully CNC machined
Precision machined ring grooves
Bottom oilers for pin lubrication
Precision machined for exact pin
VHM special high quality billet aluminum
Unique internal shape for increased
rigidity and optimum strength in
critical stress areas
Cylindrical shape during operating
Tapered piston pin for reduced weight
VHM piston kit
with APR540.8 Piston ring,
APP1545 Piston Pin,
APC151.0 Piston clip
VHM piston kit flat
Ø53.94-Ø53.95 for 0.7 mm piston ring
New flat top piston
with 0.70 mm piston ring.
Must be used with
short piston pin, PIP711162!
Can be used for Honda RS125 and RS250.
Piston weight 117 gram.
Content: Piston +
0.7 mm piston ring + 2 clips
Piston pin Ø15
short 41 mm special
Piston pin weight
HRC Flat Top "A" Kit
Pistons SOLD OUT No Longer Available
HRC-NX4-0601 NX4/NX5/NXA FLAT
PISTON-C 0.7 - use 13121-NJBA-003 FLAT PISTON RING
13121-NJBA-003 FLAT PISTON RING .07mm