SP125 Limited

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

Telephone 01274 583231      steve@sp125racing.com      Mobile 07738 626165
 
www.sp125racing.com
 
RS125 NEW ACCESSORIES, TUNING & PATTERN PARTS
 
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  JET HOLDER PLATE
 
  RS125 Honda Jet Holder Plate £33.00 + VAT
 

 
 

  REED SPLITTER
 
  1995~2008 RS125 Reed Splitter - Fits Standard & Jha Reed Valve Assy £125.00 + 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 ADJUSTABLE POWERJET FLOAT BOWL
 
  The VHM PowerJet Carburettor Float Bowl has been designed with an adjustable PowerJet needle. £255.00 + VAT
  The PowerJet can be adjusted from approximately #0 up to #80  PowerJet sizes by simply adjusting the external screw.
  1 turn of needle is equal to #40 PowerJet and 1 ¼ turns is equal to #45 PowerJet.
  No need to remove the float bowl to make adjustments or change the PowerJets.
 
  The standard PowerJet is not central in the carb float bowl.
  Because of this, through long fast corners the standard PowerJet can draw air when the bike is leaned over and at fully open throttle,
  as the standard PowerJet becomes higher than the fuel level in the standard float bowl.
  This can cause detonation, as the PowerJet draws in air rather than fuel.
 
  The VHM Float Bowl takes fuel from the centre of the float bowl.
  The VHM Float Bowl has 2 channels, taking fuel from the centre of the bowl and then from the adjustable PowerJet screw needle.
  This eliminates the possibility of the PowerJet drawing in air and eliminates detonation caused in long corners with the standard PowerJet system.
 

          

 
 

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

 
  New VHM A-Kit Domed Top Piston with 0.8 mm Piston Ring -With TEFLON COATING £120.00 + VAT
  This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips
 

 
  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 £155.00 + VAT
  New HRC 2008 0.7mm Flat Top Piston Ring £22.25 + 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.
 
 

  VHM 2 PIECE KIT CYLINDER HEADS
  VHM UNIQUE PERFORMANCE ENHANCING  STANDARD 2-PIECE CYLINDER HEAD DESIGN (Standard 5-Stud) £170.00 + VAT
 
  VHM UNIQUE PERFORMANCE ENHANCING  A-KIT 2-PIECE CYLINDER HEAD DESIGN (A-Kit 6 Stud) 2007 spec £170.00 + VAT
 

STD      A-KIT
 
 
  VHM INDIVIDUAL HEAD INSERT (11.20cc / 11.40cc / 11.60cc) £38.50 + VAT
  VHM INDIVIDUAL BLANK HEAD INSERT £27.50 + VAT
  VHM INDIVIDUAL SPECIAL MADE HEAD INSERT (All Head Volumes Available for Leaded & Unleaded Fuel) £55.00 + VAT
  VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR 'FLAT-TOP' PISTON (Available for Leaded & Unleaded Fuel) £55.00 + VAT
  VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR JHA KIT (Available for Leaded & Unleaded Fuel) £55.00 + VAT
  VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR SEEL KIT (Available for Leaded & Unleaded Fuel) £55.00 + VAT
 
 

  'FLAT-TOP' VHM INSERT
 
 

  VHM SQUISH, COMPRESSION & VOLUME MEASUREMENT TOOLS
  VHM 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

 
 
  VHM GP 'HEAVY' CRANKSHAFT - For Total Loss Ignition £1,250.00 + VAT
 

  VHM is now producing crankshafts for the 1995/2008 Honda RS125.
  They have done a lot of testing with different weight, balance and inertia.
  The tests show only a little difference on the dyno, but on the track the driveability feels very different.
  It can only be used with total loss (Battery) ignition. - As used by many GP Teams

Supplied with blanking plug for right side crankcase

  

 
 

      

 

 
 

 
  VHM GP 'HEAVY' CRANKSHAFT - For Standard Ignition or Total Loss Ignition £1,250.00 + VAT
   Now 3 different inertia crankshaft models available for standard ignition RS125 Honda  (24.5 + 26.5 + 27.9)
   Standard RS125 Honda Crankshaft has inertia of 24.2
 

  VHM is now producing crankshafts for the 1995/2008 Honda RS125.
They have done a lot of testing with different weight, balance and inertia, making now 3 different inertia type crankshafts.
  The tests show only a little difference on the dyno, but on the track the driveability feels very different.
  It can be used with standard A/C Generator Ignition or Total Loss (Battery) ignition. - As used by many GP Teams

  

 
 

   

 
 
  VHM GP 'HEAVY' CRANKSHAFT REBUILD SET
  Crankshaft Rebuild Kit for VHM GP 'Heavy' Crankshaft AK20005(T)  (27.9 Inertia) £115.00 + VAT
  The connecting rod kit consist of a connecting rod, Ø22x53 big end pin, needle bearing and side washers.

  27.9 Inertia  AK20005(T)
 
  Crankshaft Rebuild Kit for VHM GP 'Heavy' Crankshaft AK20015T / AK20017T (24.5 / 26.5 Inertia) £297.50 + VAT
  The connecting rod kit consist of a polished connecting rod, Ø24x54.9 big end pin, needle bearing and side washers.

  24.5 Inertia AK20015T  &  26.5 Inertia AK20017T
 
  Crankshaft Rebuild Kit for VHM GP 'Heavy' Crankshaft AK20018 Modified A-Kit  (23.0 Inertia) £315.00 + VAT
  The connecting rod kit consist of a polished connecting rod, Ø24x51.0 big end pin, needle bearing and side washers.

  23.0 Inertia  AK20018 Modified A-Kit
 
  VHM CRANKSHAFT REBUILDING CHARGE £65.00 + VAT

  VHM RETURN CRANKSHAFT SHIPMENT TO UK £30.00 + VAT
 
  VHM STANDARD RS125 HONDA CRANKSHAFT REBUILD SET
 
  Crankshaft Rebuild Kit for Standard Honda Crankshaft 1995~2008 £210.00 + VAT
  The connecting rod kit consist of a connecting rod, Ø24x54.9 big end pin, needle bearing and side washers.

  24.2 Inertia Standard Crankshaft
 
  VHM CRANKSHAFT REBUILDING CHARGE £65.00 + VAT

  VHM RETURN CRANKSHAFT SHIPMENT TO UK £30.00 + VAT
 
 

  FACTORY SAND CAST KIT CYLINDERS & BILLET CYLINDER HEADS
  FACTORY SAND CAST A-KIT CYLINDER £1,200.00 + VAT
 

 

 
 
 

  BASE GASKETS
  1998~2008 0.25mm BASE GASKET £1.70 + VAT
  1998~2008 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 PORTS DRESSING & EXHAUST BRIDGE RELIEF £35.00 + VAT
  RACING ALUMINIUM WELDING CYLINDER REPAIRS - crack repairs, detonation damage etc                         From £35.00 + VAT
  RACING DETONATION RING INSERT - Insert & Repair Detonation damage to cylinder £75.00 + VAT
 

 
 

  LOW FRICTION CRANKSHAFT MAIN BEARINGS
  1995~2008 GP SPL LOW FRICTION CRANKSHAFT MAIN BEARINGS - Longer Life, High RPM Durability, Low Friction £40.00 + VAT each
   
  When we first got these, the GP Team claimed that they made a full 1 bhp extra power !  
  We run these for the full life of the crankshaft and replace at 1,200 miles (2,000 km) and they still look perfect.  
 

 
 

  REED VALVE ASSY
  FACTORY REED VALVE ASSY £150.00 + VAT
  FACTORY REED VALVE ASSY COMPLETE WITH AKTIVE CARBON REED PETALS £193.00 + VAT
 

       

 
  FACTORY CARBON REED PETALS £43.00 + VAT

 
 

  ENGINE STANDS
  1995~2008 ENGINE STAND - can be laid flat also £80.00 + VAT
 

     

 
 

  CLUTCH BASKETS
  1995~2008 TALON BILLET HARD NICKEL PLATED OUTER CLUTCH BASKET £99.00 + VAT
  Much stronger than the original cast clutch baskets  
 

 

  
 
  1995~2008 HINSON BILLET OUTER CLUTCH BASKET £185.00 + VAT
  • Improves clutch performance and life
  • Improves heat dissipation
  • Precision machined from billet T-6 aircraft quality aluminium to aerospace tolerances, and akadized for five times the wear resistance to stock*.(*with proper maintenance)
  • Allows clutch assembly to spin more true creating less heat when clutch is disengaged.

          

 
  1995~2008 HINSON REPLACEMENT CUSH DRIVE RUBBERS FOR STANDARD/TALON/HINSON CLUTCH BASKET £21.00 + VAT

 
  1995~2008 HINSON BILLET PRESSURE PLATE £140.00 + VAT

 

  DETONATION COUNTERS
  HRC DETONATION COUNTER - With Data Logger Outlet - necessary to use with HRC DataLogger & HRC/Jha Ignition £625.00 + VAT
 

 
  HRC DETONATION SENSOR - replacement detonation sensor lead £174.50 + VAT
 

Go To HRC Detonation Counter & DataLogger Page
 
  DETONATION COUNTER From £130.00 + VAT

Go To Detonation Counter Page
 
 

  NGK SPARK PLUGS & CAPS
  R6385-105P STANDARD SPARK PLUG £35.00 + VAT
  R7282-105  (R6120-105)  RS250  'short'  SPARK PLUG £35.00 + VAT
  R7282-105A / R7282-11A  (R6120A-105 / R6120A-11)  DETONATION COUNTER SPARK PLUG £35.00 + VAT
   
  R7282-105/105A/11A SPARK PLUG CAP £18.00 + VAT
 

                 

 
 
 

  IGNITION CURVE CHANGERS
  1995~2008 RS125 16 Setting IGNITION CURVE CHANGER £245.00 + VAT
   - Simple to fit to Standard ignition, boosting mid-range power and over rev.  
   

 
 

Go To:   16 Setting Ignition Curve Changer
 
 
 

Exports of all parts supplied to outside EC Countries are exempt from UK VAT

Exports to EC Countries are exempt from VAT if a valid VAT registration number is supplied
 
 
 

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SP125 Limited Disclaimer

Honda, HRC and all other parts supplied by the SP125 Limited are not guaranteed when used in competition events.
As such, it is a condition of our making all parts available that it is solely the decision of each individual, rider, team member or team whether they choose to use any part supplied and in doing so, absolve the manufacturer and SP125 Limited of any or all such claims, including damage to equipment and/or injury to personnel irrespective of how caused.
All parts remain property of SP125 Limited until paid for in full.

All 'special order' parts, that are ordered specially under the instruction of the customer, are non returnable and non refundable.