Motorcycle Engine Servicing

Motorcycle engine servicingAs well as general workshop servicing we also undertake specific engine work. If your bike has developed an unknown noise or fault we can undergo a full diagnostic assessment, source OEM or performance parts.

We also undertake engine tuning and are a supplier of many performance parts. Please see our online shop.

Services include:

  • Motorcycle Cylinder/Barrel Repairs and Re-Bores
  • Steel Liners
  • Nikasil or Plated Cylinders
  • Crankshafts

Motorcycle Cylinder/Barrel Repairs and Re-Bores

We offer a few services depending on what type of barrel you have:

Steel Liners

Replate Motorcycle Pistons
If your barrel has a steel liner it may just need re-boring for the next oversize piston. This can be done easily and we can supply a range of pistons and gasket sets usually from stock including Mitaka, Wossner and Wiseco. We can also fit a new steel liner to your original cylinder if yours is damaged or beyond re-boring. Fitting a steel liner can also be done as a cheaper alternative to re-plating a Nikasil cylinder.

Prices For Steel Liner Fitting

  • 65cc (KX Only): £125.00
  • 85cc:  £130.00
  • 125cc: £134.00
  • 250: £138.00

Prices For Steel liner Fitting With Mitaka Piston & Top End Gasket Set

  • Rebore only: £42
  • 65cc (KX Only): £169.00
  • 85cc: £179.00
  • 125cc: £189.00
  • 250cc: £199.00
  • Other piston/gasket prices – please call us or click here

Nikasil or Plated Cylinders

Mitaka Piston Barrel GasketsWe are able to re-plate your original cylinder back to maufacturer specification and supply a range of pistons and gasket sets usually from stock. Most damage is repairable. Gauges detonation to the top of the barrel and scores can be welded up and re-plated – this is a considerable saving on a new barrel.

Re-plate Prices

  • Straight replate: £125.00
  • Repair and replate: £159.00
  • Detonation repair: £187.95

Re-plate Prices Supplied With Mitaka Piston & Top End Gasket Set

  • Straight Re-Plate (125): £179.00
  • Repair & Re-Plate (125cc): £213.00
  • Straight Re-Plate (250cc): £199.00
  • Repair & Re-Plate (250cc): £233.00

When sending cylinders please remove all studs, bolts, power valves or other parts.
Only a bare cylinder is required. If there are parts or studs which you cannot remove
then we can be remove them but this may incur a charge for labour.


Most crankshafts are rebuildable so having yours serviced and repaired can be a huge saving on buying a new one. Please contact us and see how much we can rebuild yours for. Prices start from as little as £85.

We also supply original replacement and race cranks, please see our online shop for prices.
Motorcycle Crankshaft Servicing

Send us your engine parts

Send us your engine partsFor our best possible service and quick turnaround, please print off this servicing form, fill it in and send it back with your engine parts to:

Firefox Racing, Waddington Street, Keighley, BD21 5LP

Looking to buy motorcycle engine parts online?

Shop online for motorcycle parts and accessoriesWe stock a large range of motorcycle engine parts in our workshop which can be ordered online and shipped direct to you.

Shop online for motorcycle engine parts →

Bike Servicing
MOTs, tyre fitting, annual servicing and electrical diagnostics. more info
Rear Shock Rebuild / Servicing
Full Shock rebuild, servicing and set up. more info
Fork Servicing
Front fork rebuilds and set up for your riding style. more info
Engine Servicing
Engine tuning, servicing and rebuilds more info
Ohlins Steering Damper Servicing
Repair and rebuild of Ohlins motorcycle steering dampers. more info

Contact us

Firefox Racing
Grafton Works
Waddington Street
BD21 5LP

01535 606200

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