HONDA RS125 NEW ENGINE ACCESSORIES, TUNING & PATTERN PARTS 2023
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VHM CRANKSHAFT REBUILD KIT FOR STANDARD HONDA RS125 CRANKSHAFT
Conn-Rod rebuild kit for rebuilding the original 1995~2004 Honda RS125 Crankshaft 13300-NX4-711
Big end pin is same dimensions as Standard Honda RS125.
The connecting rod kit consists of a billet VHM connecting rod, Ø24x54.9 big end pin, high spec big end needle bearing and side washers. £395.00 + VAT
VHM have developed a superior connecting rod for the Honda RS125 crankshafts.
The connecting rods are made of the best material which is CNC machined to remove all surface imperfections.
The rods are then machined to final size and has then been shot- peened and polished to achieve the ultimate in strength and durability.
Conn-Rod rebuild kit for rebuilding the original 1995~2004 Honda RS125 Crankshaft 13300-NX4-711
Big end pin is same dimensions as Standard Honda RS125.
The connecting rod kit consists of a billet VHM connecting rod, Ø24x54.9 big end pin, high spec big end needle bearing and side washers. £395.00 + VAT
VHM have developed a superior connecting rod for the Honda RS125 crankshafts.
The connecting rods are made of the best material which is CNC machined to remove all surface imperfections.
The rods are then machined to final size and has then been shot- peened and polished to achieve the ultimate in strength and durability.
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TKRJ JAPANESE CRANKSHAFT REBUILD KIT FOR STANDARD HONDA RS125 CRANKSHAFT
The TKRJ Connecting Rod Kit has been developed and manufactured in Japan.
Direct replacement for rebuilding the original 1995~2004 Honda RS125 Crankshaft 13300-NX4-711
The mileage control is the same as HRC, recommend 2,000km, if it used with standard Honda RS125 engine
Also supplied with Small End Bearing £235.00 + VAT
The TKRJ Connecting Rod Kit has been developed and manufactured in Japan.
Direct replacement for rebuilding the original 1995~2004 Honda RS125 Crankshaft 13300-NX4-711
The mileage control is the same as HRC, recommend 2,000km, if it used with standard Honda RS125 engine
Also supplied with Small End Bearing £235.00 + VAT
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CLUTCH COVER GASKET
Pattern Clutch Cover Gasket - for the 1995~2004 Honda RS125.
Replaces the Honda GASKET,R.COVER 11394-NX4-003 which are now discontinued & sales finished by Honda.
£15.00 + VAT each
Made from 0.5mm Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
Pattern Clutch Cover Gasket - for the 1995~2004 Honda RS125.
Replaces the Honda GASKET,R.COVER 11394-NX4-003 which are now discontinued & sales finished by Honda.
£15.00 + VAT each
Made from 0.5mm Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
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CYLINDER BASE GASKETS
Pattern Cylinder Gaskets - for the 1998~2004 Honda RS125.
0.5mm (Replaces the Honda GASKET,CYLINDER (0.5T) 12195-NX4-781 which are now discontinued & sales finished by Honda.
0.70mm
0.95mm
£7.50 + VAT each
Made from Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
Pattern Cylinder Gaskets - for the 1998~2004 Honda RS125.
0.5mm (Replaces the Honda GASKET,CYLINDER (0.5T) 12195-NX4-781 which are now discontinued & sales finished by Honda.
0.70mm
0.95mm
£7.50 + VAT each
Made from Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
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WATER PUMP COVER GASKET
Pattern Water Pump Cover Gasket - for the 1995~2004 Honda RS125.
Replaces the Honda GASKET,WATER PUMP 19229-NX4-003 which are now discontinued & sales finished by Honda.
£6.25 + VAT each
Pattern Water Pump Cover Gasket - for the 1995~2004 Honda RS125.
Replaces the Honda GASKET,WATER PUMP 19229-NX4-003 which are now discontinued & sales finished by Honda.
£6.25 + VAT each
REED VALVE GASKET
Pattern Reed Valve Gasket - for the 1990~2004 Honda RS125.
Replaces the Honda GASKET,REED VALVE 14132-NF4-651 which are now discontinued & sales finished by Honda.
£5.00 + VAT each
Made from Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
Pattern Reed Valve Gasket - for the 1990~2004 Honda RS125.
Replaces the Honda GASKET,REED VALVE 14132-NF4-651 which are now discontinued & sales finished by Honda.
£5.00 + VAT each
Made from Elring EWP 210 German quality gasket material.
EWP 210 is a gasket material based on aramide fibers with NBR binder.
EWP 210 combines excellent oil and fuel resistance with good stress relaxation and high tensile strength.
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JET HOLDER PLATE
RS125 Honda Jet Holder Plate - Main Jets numbered x1 from #150 to #220 £40.00 + VAT
PISTON / CONN-ROD SMALL END BEARING
Pattern Small End Bearing - Made in Japan. £25.00 + VAT
The original Honda Small End Bearing, part number 12213-ND5-000, is now discontinued and not possible to buy.
This bearing is a direct replacement for the original RS125 & RS250 Honda part.
Performance and reliability is as good as the original Honda bearing.
Pattern Small End Bearing - Made in Japan. £25.00 + VAT
The original Honda Small End Bearing, part number 12213-ND5-000, is now discontinued and not possible to buy.
This bearing is a direct replacement for the original RS125 & RS250 Honda part.
Performance and reliability is as good as the original Honda bearing.
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VERTEX 'FLAT TOP' A-KIT PISTONS & 0.8mm PISTON RINGS
New Vertex Flat Top A-Kit Piston with 0.8 mm Piston Ring £135.00 + VAT
Designed specially for Honda RS125 and Honda RS250 and used with standard Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips
A cheaper version flat top piston available for both Honda RS125 & Honda RS250.
We have used these pistons ourselves, with no problems, but a little more work is necessary in relieving the piston skirt edges and in setting the piston ring gap, compared to when using the VHM flat top pistons.
Overall weight is 12g more than the VHM flat piston, but it does not seem to effect performance.
Sizes available: A = 53.94mm B = 53.95mm C = 53.96mm
The A-Kit Flat Top Piston has the Piston Ring Gap directly at the back of the Piston, running over the rear boost port.
Can be used in standard cylinders, but the standard cylinder would require the rear boost port chamfering, so the piston ring does not 'snag' in the port.
Designed specially for Honda RS125 and Honda RS250 and used with standard Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips
A cheaper version flat top piston available for both Honda RS125 & Honda RS250.
We have used these pistons ourselves, with no problems, but a little more work is necessary in relieving the piston skirt edges and in setting the piston ring gap, compared to when using the VHM flat top pistons.
Overall weight is 12g more than the VHM flat piston, but it does not seem to effect performance.
Sizes available: A = 53.94mm B = 53.95mm C = 53.96mm
The A-Kit Flat Top Piston has the Piston Ring Gap directly at the back of the Piston, running over the rear boost port.
Can be used in standard cylinders, but the standard cylinder would require the rear boost port chamfering, so the piston ring does not 'snag' in the port.
Individual Parts Available
New Vertex 0.8mm Piston Ring £24.50 + VAT
New Vertex 45mm x Ø15mm Piston Pin £10.00 + VAT
New Vertex Piston Circlip £0.75 + VAT
New Vertex 0.8mm Piston Ring £24.50 + VAT
New Vertex 45mm x Ø15mm Piston Pin £10.00 + VAT
New Vertex Piston Circlip £0.75 + VAT
VERTEX 'DOMED TOP' A-KIT PISTONS & 0.8mm PISTON RINGS
New Vertex A-Kit Domed Top Piston with 0.8 mm Piston Ring
Designed specially for Honda RS125 and RS250 and used with standard Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips £135.00 + VAT
Designed specially for Honda RS125 and RS250 and used with standard Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x piston pin & 2x clips £135.00 + VAT
Sizes available: A = 53.94mm B = 53.95mm C = 53.96mm
The A-Kit Domed Top Piston has the Piston Ring Gap directly at the back of the Piston, running over the rear boost port.
Can be used in standard cylinders, but the standard cylinder would require the rear boost port chamfering, so the piston ring does not 'snag' in the port.
Individual Parts Available
New Vertex 0.8mm Piston Ring £24.50 + VAT
New Vertex 45mm x Ø15mm Piston Pin £10.00 + VAT
New Vertex Piston Circlip £0.75 + VAT
The A-Kit Domed Top Piston has the Piston Ring Gap directly at the back of the Piston, running over the rear boost port.
Can be used in standard cylinders, but the standard cylinder would require the rear boost port chamfering, so the piston ring does not 'snag' in the port.
Individual Parts Available
New Vertex 0.8mm Piston Ring £24.50 + VAT
New Vertex 45mm x Ø15mm Piston Pin £10.00 + VAT
New Vertex Piston Circlip £0.75 + VAT
VHM SOLID BILLET DOMED TOP A-KIT PISTON - Honda RS125 / RS250
Designed specially for Honda RS125 and RS250 and used with standard Ø15mm Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x Ø15mm piston pin & 2x clips
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size A1 Ø53.92 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size A Ø53.93 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size B Ø53.94 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size C Ø53.95 £147.50 + VAT
Designed specially for Honda RS125 and RS250 and used with standard Ø15mm Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x Ø15mm piston pin & 2x clips
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size A1 Ø53.92 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size A Ø53.93 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size B Ø53.94 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125 /RS250 Size C Ø53.95 £147.50 + VAT
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VHM SOLID BILLET FLAT TOP A-KIT PISTON - Honda RS125 / RS250
Designed specially for Honda RS125 and RS250 and used with standard Ø15mm Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x Ø15mm piston pin & 2x clips
VHM Billet Flat Top A-Kit piston kit Honda RS125 /RS250 Size A Ø53.93 £147.50 + VAT
VHM Billet Flat Top A-Kit piston kit Honda RS125 /RS250 Size B Ø53.94 £147.50 + VAT
Designed specially for Honda RS125 and RS250 and used with standard Ø15mm Honda Small End Bearing 91101-NX5-023
This piston comes complete with 1x 0.8 mm piston ring, 1x Ø15mm piston pin & 2x clips
VHM Billet Flat Top A-Kit piston kit Honda RS125 /RS250 Size A Ø53.93 £147.50 + VAT
VHM Billet Flat Top A-Kit piston kit Honda RS125 /RS250 Size B Ø53.94 £147.50 + VAT
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1987 - 1994 NF4 Honda RS125 (Ø14 piston pin) VHM piston kit
available for older model RS125 and RS250 Honda's using Ø14mm piston pin.
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size A Ø53.93 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size B Ø53.94 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size C Ø53.95 £147.50 + VAT
available for older model RS125 and RS250 Honda's using Ø14mm piston pin.
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size A Ø53.93 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size B Ø53.94 £147.50 + VAT
VHM Billet Domed Top A-Kit piston kit Honda RS125, RS250, piston pin Ø14 Size C Ø53.95 £147.50 + VAT
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With many years of experience in research and design of 2 stroke pistons, this has led VHM in the development and manufacturing of pistons machined from a solid billet material.
This gives VHM the great possibility to change quickly to any shape.
Other improved material properties can be tested quickly without high cost and VHM have great control over dimensional accuracy.
VHM billet pistons are 100% CNC machined from a high quality solid billet material, specially manufactured according to VHM specifications and material properties.
The pistons feature internal and external machining to unique shapes for an increased rigidity.
The billet pistons 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 2x clips.
Benefits:
This gives VHM the great possibility to change quickly to any shape.
Other improved material properties can be tested quickly without high cost and VHM have great control over dimensional accuracy.
VHM billet pistons are 100% CNC machined from a high quality solid billet material, specially manufactured according to VHM specifications and material properties.
The pistons feature internal and external machining to unique shapes for an increased rigidity.
The billet pistons 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 2x clips.
Benefits:
- Fully CNC machined
- Precision machined ring grooves
- Bottom oilers for pin lubrication
- Precision machined for exact pin clearince
- VHM special high quality billet aluminum alloy
- Unique internal shape for increased rigidity and optimum strength in critical stress areas
- Cylindrical shape during operating temperature
- Tapered piston pin for reduced weight
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.
- High performance
- Direct replacement
- Inside coating and Z-clips
- Longevity
- Keeps high performance during lifetime
HRC 'FLAT TOP' A-KIT PISTONS & 0.7mm PISTON RINGS
HRC Flat Top Piston - Sold Out - Sales Finished
HRC 0.7mm Flat Top Piston Ring - Sold Out - Sales Finished
HRC 0.7mm Flat Top Piston Ring - Sold Out - Sales Finished
Please note: The HRC 'Flat Top' Piston & 0.7mm Piston Ring is now discontinued and sales finished by Honda.
Honda / HRC do not plan to make any further 'Flat Top' Pistons & 0.7mm Piston Rings.
Honda / HRC do not plan to make any further 'Flat Top' Pistons & 0.7mm Piston Rings.
VHM 2 PIECE KIT CYLINDER HEADS
VHM CYLINDER HEAD Cover (Standard 5-Stud) £225.00 + VAT
VHM CYLINDER HEAD Cover (A-Kit 6 Stud & JHA A-kit RS-V) £235.00 + VAT
VHM CYLINDER HEAD Cover (A-Kit 6 Stud & JHA A-kit RS-V) £235.00 + VAT
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VHM INDIVIDUAL HEAD INSERT (11.20cc / 11.40cc / 11.60cc) £70.00 + VAT
VHM INDIVIDUAL BLANK HEAD INSERT £70.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT (All Head Volumes Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR 'FLAT-TOP' PISTON (Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR JHA KIT (Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR SEEL KIT (Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL BLANK HEAD INSERT £70.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT (All Head Volumes Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR 'FLAT-TOP' PISTON (Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR JHA KIT (Available for Leaded & Unleaded Fuel) £85.00 + VAT
VHM INDIVIDUAL SPECIAL MADE HEAD INSERT FOR SEEL KIT (Available for Leaded & Unleaded Fuel) £85.00 + VAT
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VHM SQUISH, COMPRESSION & VOLUME MEASUREMENT TOOL
VHM PISTON PROJECTION / SQUISH SETTING TOOL £157.50 + VAT
An absolute 'must have' to achieve accurate squish, volume and port timing
TALON CLUTCH BASKETS
1995~2016 TALON BILLET HARD NICKEL PLATED OUTER CLUTCH BASKET Much stronger than the original cast clutch baskets £119.00 + VAT
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CLUTCH BASKET CUSH DRIVE RUBBERS
1995~2016 HINSON REPLACEMENT CUSH DRIVE RUBBERS FOR STANDARD/TALON/HINSON CLUTCH BASKET £70.00 + VAT
HRC HONDA RS125 DETONATION COUNTERS
HRC DETONATION COUNTER - With Data Logger Outlet - necessary to use with HRC DataLogger & HRC/Jha Ignition £1,025.00 + VAT
HRC DETONATION SENSOR LEAD
HRC DETONATION SENSOR - replacement HRC detonation sensor lead Discontinued - Sold Out
Click the button below for information about our replacement Detonation Sensor wire.
DETONATION COUNTER
DETONATION COUNTER From £160.00 + VAT
NGK SPARK PLUGS & CAPS
NGK R7282-105 RS125/RS250 'short' SPARK PLUG £80.00 + VAT
NGK R7282A-105 DETONATION COUNTER SPARK PLUG £110.00 + VAT
NGK TRS1225B SPARK PLUG CAP £70.00 + VAT
NGK R7282A-105 DETONATION COUNTER SPARK PLUG £110.00 + VAT
NGK TRS1225B SPARK PLUG CAP £70.00 + VAT
IGNITION CURVE CHANGERS
1995~2016 RS125 16 Setting IGNITION CURVE CHANGER - Simple to fit to Standard ignition, boosting mid-range power and over rev. £245.00 + VAT
Exports of all parts supplied outside of UK, to EU Countries, USA, Australia, South Africa, Asia etc are exempt from UK VAT and will be charged 0% VAT.
On arrival to your destination country, you may be asked to pay additional duties and taxes by customs, before the shipment is delivered.
Import tax, customs & duties regulations vary from country to country.
Payment of all Import tax, customs & duties charges are the responsibility of the customer.
On arrival to your destination country, you may be asked to pay additional duties and taxes by customs, before the shipment is delivered.
Import tax, customs & duties regulations vary from country to country.
Payment of all Import tax, customs & duties charges are the responsibility of the customer.
SP125 Limited
22 Walker Wood, Baildon, Shipley, West Yorkshire, BD17 5BE, England
Telephone 01274 583231 steve@sp125racing.com Mobile 07738 626165
22 Walker Wood, Baildon, Shipley, West Yorkshire, BD17 5BE, England
Telephone 01274 583231 steve@sp125racing.com Mobile 07738 626165
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.
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.
