I've used the "ordinary" Vijay box (10;12;16;19.....50;42;38;35) which is basically SX150 with less of a gap between 3 and 4.
Works very well with an SR185 taken out to 200cc's, although I will be putting a 16T front on when I change the clutch
Chris
Indian gear ratios
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bristolmod
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Thanks for all your replies but on even closer inspection I can see that the bearing surface on the inner cluster bearing is damaged so unless anyone has a good spare I'll be looking for something else 
