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Suitable for:
- Mash Fifty, Dirt track 50, X-Ride 50 (NOTE: not suitable for Euro5 without ECU tuning!) 
- Zhenhua Ape 50 
- Orion RX50 
- Hanway Scrambler 50 
- Skyteam Ace 50, Ace 50-R, Scrambler 50 
- Masai Scrambler 50, Black caf? 50 
- Archive Caferacer AM-84, Scrambler AM-80 
- For engine code: 139FMB-B (vertical cylinder). 
Not sure if this fits your engine? Mail us for advice.
For Mash fifty we recommend a gear ratio of 15T / 48T. Note: If the moped runs too lean with 85cc, it is necessary to install a larger (m4) main jet in the carburettor.