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C-Clipper piston cir-clip 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 Performance Pistons

As we 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 RPM motors.

Honda RS125 and RS250
 WOS-8244DA Wossner Honda RS125 GP Domed top 53.94mm piston $120.00   
WOS-8244DB Wossner Honda RS125 GP Domed top 53.95mm piston $120.00   
WOS-8244DC Wossner Honda RS125 GP Domed top 53.96mm piston $120.00   

 WOS-8245DA Wossner Honda RS125 GP Flat top 53.94mm piston $120.00        
 WOS-RSA5400 Wossner Honda RS125 GP Ringset 54.00 X 0.8mm $17.31        

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 temperature.

Honda CRF250 & CRF250X
WOS-8656DA Wossner Honda CRF250 & CRF250X 13.5:1 '06- "09, 77.95mm #8656DA Piston kit (rings- 780XAS, PIN- WP959, CLIP- CW16) Clearance:0.04mm
                                                                              $150.62


For all those racers that have been looking for
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.

VT23105A Vertex 23105A Honda RS-GP95-97 125cc D. 53.94mm (02V) Piston w/ring (53007805400),
pin (711127) and clips ( 72071)     $220.85  

PI13116-01 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

$329.95
PIP711162 Piston pin Ø15 short 41 mm special

Piston pin weight 28,2 gram.

 

$42.60

 

HRC Flat Top "A" Kit Pistons No Longer Available from HRC

HRC-NX4-0601 NX4/NX5/NXA FLAT PISTON-C 0.7 - use 13121-NJBA-003 FLAT PISTON RING  $328.13


13121-NJBA-003 FLAT PISTON RING .07mm $44.27