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GENERAL INFORMATION
23
GB
ENGINE
Type ....................................................Single-cylinder, 2-stroke, liquid cooled
and electric start
Bore x stroke RR 250 ............................................................ 66,4 x 72 mm
Bore x stroke RR 300 ............................................................... 72 x 72 mm
Displacement (cm
3
) RR 250 ............................................................ 249 cm
3
Displacement (cm
3
) RR 300 ......................................................... 293,1 cm
3
Compression ratio RR 250 ............................................................... 12,8:1
Compression ratio RR 300 .................................................................. 12:1
Carburetor .................................................................................. see table
RR 250 RR 300
Version Certif.
Competition*
Certif.
Competition*
Carburetor type PWK 36S AG PWK 36S AG
Main jet 118 165 118 165
Slow jet 35 35 38 38
Start jet 50 85 50 85
Needle N84K N0ZK N84K N2ZW
Needle position (from top) 3°+1/2 2° 4° 2°
Air screw turns (from all closed)
1 + 3/4 1+1/4 2 1+1/4
Striker YES NO YES NO
* - Such modification makes the vehicle non-compliant with the road regulations in force. Its use must be limited to the
sole priivate circuits which are closed to circulation.
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