Originally Posted by
Kensei
FDR HMX with 48DP
4.5 with 78 and 29
The chart in the manual ends at FDR 4.17 with 78 and 32.
How do I make 4.0 and 3.5? These are used in stockracing at the Dutch Nationals (and other events also).
http://www.arroyoc.com/index.cfm?fus...=Gear&Plot=mid
Google, and than gearchart rc .. and then the upper link. so now you can see what pinion and spur size you need.