1
GENERAL INFORMA
TION
22
GB
ENGINE
Type ................................................. Single cylinder, 4-stroke, liquid-cooled
with countershaft and electric starting
Bore x stroke RR 350 ........................................................... 88 x 57,4 mm
Bore x stroke RR 400 ........................................................... 95 x 56,2 mm
Bore x stroke RR 450 ........................................................... 95 x 63,4 mm
Bore x stroke RR 498 ......................................................... 100 x 63,4 mm
Displacement (cm
3
) RR 350 ...........................................................349 cm
3
Displacement (cm
3
) RR 400 ...........................................................398 cm
3
Displacement (cm
3
) RR 450 ........................................................449,4 cm
3
Displacement (cm
3
) RR 498 ........................................................497,9 cm
3
Compression ratio RR 350 .............................................................. 13,3:1
Compression ratio RR 400 .............................................................. 12,4:1
Compression ratio RR 450 ............................................................ 11,95:1
Compression ratio RR 498 .............................................................. 12,0:1
Fuel system ............................................................................... carburetor
Carburetor
RR 350
RR 400
RR 450
RR 498
Version
Homolog. Race* Homolog. Race* Homolog. Race* Homolog. Race*
Carburator type
Keihin FCR-MX 39
Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 39
Main jet
168 170 175 175 162 175 175 180
Idling jet
42 40 45 45 45 45 45 45
Starter jet
85 85 85 85 85 85 85 85
Needle
OBDVS NCVQ OBDVS OBDTS OBEKT OBDVS OBDVS OBDVS
Needle position
(from above)
2° 3° 1° 5° 2° 4° 1° 4°
Main air jet
200 200 200 200 200 200 200 200
Idling air jet
100 100 100 100 100 100 100 100
Mixture control screw
1/4
1 + 1/2 1 + 3/4 1 + 1/2
1
1 + 1/2 1 + 3/4 1 + 1/2
(from fully closed)
Intake jet
40 40 50 50 40 40 40 40
Stop
YES NO YES NO YES NO YES NO
*
- This change makes the vehicle not complying with the Highway Code. Use should be limited to private circuits and
routes closed to traffi c.