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Best way IMO is to call Yoshi and buy his but it's not cheap.
Well that actually does not sound all too bad Yoshi! Will you be posting pics of this unit?
The unique part of it is not that there are two chains, but that they are the smaller 428 size. With a 428 chain I will get nearly 75 links with the same center to center and gain 2" of ground clearance.
chaincase parts. I think I'm gonna do a double single setup with size 40/41 chain. Here is what I've got drawn so far. 1.75" flange to flange, could be narrowed a little but I thought I'd leave at least a little clearance.
With two chains I can run a smaller size chain which means smaller OD sprocket with the same gear ratio. Plus two chains = higher total tensile strength and in theory longer chain and sprocket life because load is spread over more surface area.60t #530 pitch dia. = 11.95"60t #40 pitch dia. = 9.56"60t #35 pitch dia. = 7.17"I am trying to get as much reduction in one step as possible without building a huge unit.