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Old 08-30-2018, 04:18 AM
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controlliner
 
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No, the .15 side exhaust has a carb boss that is @10 MM. The 2.5cc (also a .15) has the carb boss at I believe is around 15MM. So the carb for the pro 15 will not fit the 2.5 rear exhaust.
Also, even if you could fit the smaller carb to the 2.5cc rear exhaust engine, the pro 15 carb bore is 5 mm (too small) and the engine although would get excellent fuel economy, it would perform like poo.

Last edited by controlliner; 08-30-2018 at 04:21 AM.