February 14, 200818 yr Interesting - I ran both my B40's (trials and trail) with a 520 Chain and had no problems with it fouling the oil seal. This is how it came as standard on a B25 and the frame and engine position are the same..... Unless its because the 14t sprok I used placed the chain plates outside the oil seal whereas the 12t puts them right by the seal??
February 19, 200818 yr Author Hi Guy's Yes it is the 12 tooth that is the problem. I should have thought about this before posting. With this Talon sprocket the chain sits right down along side the oil seal, another cure I have thought about is to use a totaly sealed gearbox bearing and machine of the face of the oilseal holder. May try this on the next engine. Regards Charlie.
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