NSR250 & NSR500V Specialist Services

We offer full support for Honda NSR250 street & track bikes, and HRC RS250 NF5, NX5, NXA, & NSR500V Grand Prix bikes.

Our range of services include:

  • NSR250 Engine tuning
  • RS250 NF5 NX5 & NXA tuning
  • NSR & RS crankcase repairs
  • Crankshaft servicing
  • Cylinder replating
  • Carb & RC Valve setup
  • AVGAS and unleaded setup
  • Suspension service
  • Space
    NSR500V workshop facilities
  • Space
    NSR500V custom built by Performance Engineering
  • Space
    1989 NSR250 crankshaft rebuild
  • Space
    NSR250 MC16 rebuilt crankshaft
  • Space
    NSR250 1988 MC18 crankshaft rebuild
  • Space
    NSR250SP MC21 & MC28 rear shock rebuild service
  • Space
    MC28 "NSR-WORLD SP" tuned motor with VHM heads
  • Space
    NSR250 lightended flywheel
  • Space
    NSR500 engine rebuilds
  • Space
    NSR500 crankshaft rebuilds
  • Space
    NSR250 fully floating disc conversions


With over 25 years experience with the brand, we're the UK's leading NSR250 specialist.

From a simple service, to a full restoration, and everything in between, Performance Engineering is the perfect company for your needs.

We are also Europe's most prominent NSR500V specialists, owning possibly the largest operational collection outside of Japan. We have also "scratch built" two NSR500s from the ground up, remanufacturing many discontinued parts during the process.

Performance Services:

  • NSR250 crankshaft rebuild:From £275* + £25 assessment + parts
  • NSR250 crankcases machined to HRC/TT-F3 spec:£300
  • NSR250/RS250 Crankcase cleanup & matched to cylinders:£200
  • NSR250 barrel deck height optimisation:£35 per cylinder
  • NSR250 RC Valve weld & regrind:£50 per cylinder**
  • Port optimisation:POA depending on level of tune
  • NSR250 flywheel lightening:£40
  • NSR250 MC18/MC21 sprocket carrier lightening:£40
  • NSR300 head squish optimisation (increased peak power):£35 each
  • NSR250 MC18/MC21/MC28 fully floating front disc conversion:From £187.50 pair
  • NSR250R/SP/RS250 rear shock rebuild:From £120
  • Dyno test session:£42
  • NSR250/RS250/NSR500 dyno setup (inc RC Valve setup):From £250

* From £325 + £25 assessment with client supplied main bearings.

** £35 per cylinder with porting work.