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Old 04-12-2018, 10:54 AM
  #4  
Roelof
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Join Date: Aug 2007
Location: Holland
Posts: 8,361
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I have used ones a 16.22 button on a 16.44 bore without an issue....


But hey:
https://www.rctech.net/forum/offroad...es-thread.html


Displacement :3.46cc
Bore :16.60mm
Stroke :16.0mm
Practical RPM :3500 ~ 40000 RPM
Power Output :2.58 hp / 35000 RPM
Weight :326 grams
Ports :3 Intake Ports
Construction Type :ABC


That should be the right button.
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