Re: Jawa Babetta 207 X25 vs X30

b to the eff /
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I haven't been able to find a detailed list of differences, but I expect the usual things apply. Carb / intake diameter, exhaust, etc.

It's worth noting that the Jawa promotional material does say that the 30 mph versions have higher compression, so they probably ran a thinner or no head gasket:

http://www.jawamoped.com/html/207_specs.html

Unfortunately the 207 spare parts catalog doesn't detail which parts go to which speed versions, but the owner's manual does say that the higher speed version takes a larger main jet in the carb, which implies various changes for better airflow through the system.

Also, you can put a 210 cylinder on a 207; it has much better porting and they are still available (treatland or jawashop). (edited)

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