Beta 350 - Engine Specifications and Carburetor

1
GENERAL INFORMATION
25
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
Carburetor .................................................................................. see table
R350 R400 R450 R498
Type Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 39 Keihin FCR-MX 39
Carburator-setting number 006121308 000 006.12.100.8.0 006.12.000.8.0 006.12.200.8.0
Main jet 170 175 175 180
Jet needle NCVQ OBDTS OBDVS OBDVS
Idling jet 40 45 45 45
Main air jet x 200 200 200
Idling air jet 100 100 100 100
Needle position 3° 5° 4° 4°
Mixture control screw open 1+1/2 1+1/2 1+1/2 2
Intake jet 40 50 40 40