strange pinion problem

[mattym0310]

hi everyone. i own a non worlds bj4 and have fitted an LRP Sphere comp 2007 with an x11 6.5t motor. i was told to run a 14t pinion but when meshed correctly the motor is too close to the drive cup which is rubbing against the motor . has anyone got any solutions?? or ideas/reasons?

thanks very much

[Andrew Simpson]

14 is a bit small

i run a 19 pinion with my 4* (bout 5.5 i believe)

see what others say

[Wraggy]

what size spur are you running ???

[mattym0310]

i think its a 78 but am not fully sure

[Wraggy]

well i used to run my 6.5 in my S4 (same drive train as bj4) on a 18/81 so if your running a 78 spur the put it on a 17 or even an 18 ..

[bigred5765]

78x17 would give you a overall ratio of 10.323
which isnt to fare of for a 5.5 4*

[Mi Julie]

Yep, a bigger spur is the hot ticket here my friend!