RM 125 gearing

[Nipper]

I thinking of using 13 - 55 gearing for my RM 125 B is this around the mark for motocross ? And if the bike was to be used for dirt track what would be an acceptable gearing ratio ? Cheers Nipper

[Davey Crocket]

I run 13/59....tried other ratios.....13/53....13/57.....59 is a good allround gearing.....MX and DT.

[asasin]

depends on you weight and throttle hold on ability
Me I need 10 : 86 just to get out of the gate.

13/55 only if you are lightweight otherwise at least 13 /57

[Nipper]

Thanks for the info guys.This bike is being built primarily for my daughter to ride so the 55 rear sprocket will probably do as that is the largest I can find at the moment. and If I am going to ride it can I get one of those 86 tooth sprockets from you Asasin ?