So it's Associated Truggy your running...whats the stock gearing ? clutch/spur ?

is there a higher tooth spur option ?? as I don't like to change clutch teeth as it is too big a jump.

for example Mugen has 3 spur options 44T, 46T Stock and a 48T

I worked out for myself and have written a gearing table in my set up folder for quick referance;

48/13 = 3.6-1
46/13 = 3.5-1 stock
48/14 = 3.4-1
44/13 = 3.3-1
46/14 = 3.2-1

as you can see 13/46 to 14/46 is a big jump, there are 2 other options in between.
I usually start with stock and only realy go one side or the other from stock depending on the track layout, I'v only ever gone to 13/44 once in truggy for a certain track.