SP125 Limited

22 Walker Wood,  Baildon,  Shipley,  West Yorkshire,  BD17 5BE,  England

Telephone 01274 583231      steve@sp125racing.com      Mobile 07738 626165

 
www.sp125racing.com
 
RS250 NEW ACCESSORIES, TUNING & PATTERN PARTS
 
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  REED SPLITTERS

 
  RS250 Reed Splitters - Fits Standard & Jha Reed Valve Assy £250.00 + VAT
  Slots straight into the reed valve and the Reeds then work independently of each other and reduces reed valve turbulence.
  Dyno test have shown a gains throughout the power range, especially over-rev.
  It is necessary to cut the rubber 'ears' off from the carb rubber.
 

Available for Honda RS125 & RS250 plus Yamaha TZ 250

 
 

  VHM A-KIT 'DOMED TOP' PISTONS & 0.8mm PISTON RINGS

 
 New VHM A-Kit Domed Top Piston with 0.8 mm Piston Ring
  This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips £105.00 + VAT
 
  Designed specially for Honda RS125 and RS250 and used with standard Honda Small End Bearing 91101-NX5-023
 

 
  Please note: The VHM A-Kit 'Domed Top' piston has been designed as a direct replacement for the  discontinued HRC A-Kit 'Domed Top' Piston.
                     The piston is manufactured by Vertex.
                     There are many other different pistons manufactured by Vertex, mostly for Road or MotoX use.
                     But only the pistons having the VHM logo inside are designed and recommended for use in Honda RS125 or RS250.
                     Do not use other 0.80 mm piston ring or other piston pin or other clips with VHM pistons!
 
  Please note: Production of the 'domed top' HRC A-Kit Pistons has now finished
                     HRC do not plan to make any more of these 'domed top' pistons and stock is now sold out.
 
 

  VHM 'FLAT TOP' PISTONS & 0.7mm PISTON RINGS

 
  The VHM pistons have been proven on various GP bikes and with good results.
  These pistons weigh less than the standard pistons, which will improve engine over rev characteristics and give better throttle response.
  The surface of the piston has a special roughness for better oiling, which will help to prevent premature seizure and damage.
 
  New VHM flat top piston with 0.70 mm low friction piston ring £105.00 + VAT
  This piston comes complete with 1x 0.7 mm low friction piston ring + 2x clips
  Must be used with special 41mm short piston pin - sold separately.
  Designed specially for Honda RS125 and RS250 and used with standard Honda Small End Bearing 91101-NX5-023
  Piston weight 117g
 

 
  New VHM Special 41mm Piston Pin £12.00 + VAT
  Piston pin weight 28.2g

 

  New VHM Special 0.7mm low friction Piston Ring £16.50 + VAT
  Piston ring weight 2.0g
 
  New VHM Special Piston Circlip £0.50 + VAT
 
  Please note: The VHM 'Flat Top' piston has been designed as a direct replacement for the  discontinued 2005 HRC 'Flat Top' Piston.
                     The piston is manufactured by Vertex.
                     There are many other different pistons manufactured by Vertex, mostly for Road or MotoX use.
                     But only the pistons having the VHM logo inside are designed and recommended for use in Honda RS125 or RS250.
                     Do not use other 0.70 mm piston ring or other piston pin or other clips with VHM pistons!
 
 

  New 2008 HRC 'FLAT TOP' PISTONS & 0.7mm PISTON RINGS

 
  New HRC 2008 Flat Top Piston £110.00 + VAT
  New HRC 2008 0.7mm Flat Top Piston Ring £17.50 + VAT
 

 

  Please note: The 2008 HRC 'Flat Top' piston & 0.7mm Piston ring has been designed as a direct replacement for the  discontinued 2005 HRC 'Flat Top' Piston.

                     These are the same pistons as used in the HRC Factory GP250 World Championship bikes.
 
 

  COATED KIT PISTONS & RINGS  -  HRC 'Domed Top' A-Kit Pistons

 
  FACTORY TEFLON COATED A-KIT PISTON - Less Friction, Improved Wear & Stops Ring Stick   SOLD OUT SOLD OUT
  FACTORY TITANIUM NITRATE COATED A-KIT 0.8mm PISTON RING - Less Friction & Improved Wear £17.00 + VAT
 

'Domed Top' A-Kit Coated    SOLD OUT       SOLD OUT

 
  Please note: Production of these 'domed top' HRC A-Kit Pistons has now finished
                     HRC do not plan to make any more of these 'domed top' pistons and stock is now sold out.
 
 

  DETONATION COUNTERS

  HRC DETONATION COUNTER £695.00 + VAT

 

Go To HRC Detonation Counter & DataLogger Page

 
 
  DETONATION COUNTER From £260.00 + VAT

Go To Detonation Counter Page

   

  NGK SPARK PLUGS & CAPS

  R7282-105  (R6120-105)  STANDARD SPARK PLUG £32.00 + VAT
  R7282-105A / R7282-11A  (R6120A-105 / R6120A-11)  DETONATION COUNTER SPARK PLUG £32.00 + VAT
   
  R7282-105/105A/11A SPARK PLUG CAP £17.50 + VAT
   

 
   
   

  CLUTCH BASKETS

  BILLET HARD ANODISED CLUTCH BASKET £99.00 + VAT
   
  Much stronger than the original cast clutch baskets - we've yet to see one break !  
 

    

 
   
   

  VHM 2 PIECE KIT CYLINDER HEADS

  UNIQUE PERFORMANCE ENHANCING  2 PIECE CYLINDER HEAD DESIGN £335.00 + VAT
  INDIVIDUAL STANDARD HEAD INSERT (11.20cc / 11.40cc / 11.60cc) £38.50 + VAT
  INDIVIDUAL BLANK HEAD INSERT £27.50 + VAT
  VHM INDIVIDUAL SPECIAL MADE HEAD INSERT (Head Volume made to customers specification) £55.00 + VAT
 

   

 
 
  PISTON PROJECTION / SQUISH SETTING TOOL £80.00 + VAT

    

 
 
  An absolute 'must have' to achieve accurate squish, volume and port timing - go to VHM Tool Information
 
 
  VHM PIPETTE / BURETTE (with adjuster for fine measurement) £45.00 + VAT

   
   

  BASE GASKETS

  0.25mm BASE GASKET £1.70 + VAT
  0.75mm BASE GASKET £1.90 + VAT

 
 

  CYLINDER REPLATING & REPAIRS

  RACING NIKASIL CYLINDER REPLATING - Coating to the highest standard - Includes Ports Dressing & Exhaust Bridge Relief £140.00 + VAT
  RACING ALUMINIUM WELDING CYLINDER REPAIRS - crack repairs, detonation damage etc                                      From £30.00 + VAT
  RACING DETONATION RING INSERT - Insert & Repair Detonation damage to cylinder £75.00 + VAT
 

 
 

  SAMBA EXHAUSTS & SILENCERS

  SAMBA EXHAUST CHAMBER - Mild Steel £475.00 + VAT - each
  SAMBA EXHAUST CHAMBER - Titanium £975.00 + VAT - each