Mini R1 - Classic Mini bike engine conversion kit FWD

R1 Engine specs

Credit cards accepted
for UK sales only.

Race Car Preparation

LynxAE, Unit 1, Hill View, Raunds Road, Chelveston, Wellingborough NN9 6AA

Tel : 07831 556973   email :

Established 1986

Yamaha YZF-R1 engine specification
Our kit is designed to be used with the Yamaha YZF-R1 engine from 1998 to 2003. There are many variants of the Yamaha YZF R1 engine, the first of which arrived in 1998. However the later more powerful engines such as the 2004 (5VY) and 2007 (4C8) are different designs of engine and are not suitable for our conversion kit, see below for further details,
in line 4
Compression ratio:
Valve train:
20 Valves DOHC
Bore & stroke:
74 × 58 mm (2.9 × 2.3 in)
6-speed w/multi-plate clutch
Fuel system:
Carburetor or Fuel injection depending on year
Ignition system:
Approx BHP:
145 to 164 (depending on year)
ID Code
Key features / changes
1998 - 1999
4x 40mm Mikuni carburetors
2000 - 2001
Slight increase in power
Modified carburetors.
Change to camshaft lubrication.
Revised lighter gearbox with change to ratios giving a taller 1st gear.
2002 - 2003
Fuel injection
Slight power increase and higher revving
  Where can I get an engine?

We recommend Yorkshire engines or extreme engines. However ebay is also good.

No body modifications required.
The car above has standard
front and inner wings still installed.
The later more powerful engines which are not compatible with our kit are as follows,
2004 - 2006
All new larger engine
Increased compression ratio
Bore & Stroke change
Power increase
2007 - 2008
All new engine
Change from 20 valves to 16 valves
Power increase to 180+ bhp
6-speed w/multi-plate slipper clutch
Fuel Injection with YCC-T and YCC-I (Yamaha Chip Control Intake) which controls the throttle body trumpets causing them to squeeze up when revs rise above 10,400rpm
2009 - 2010
Increased compression ratio
Bore & stroke change
Titanium valves
Crossplane crankshaft
Power increase