drop n roll
Hello I have tried 2 ways The first is old tech. but works good we cut and streched the chaincase so the top shaft is in the stock location and the bottom moves down n back approx 2 and a half inchs.(I'll check my friend may still have a spare one,I believe eckholm and cycleworks used to build them) the down fall is the yamaha chain,chain case and top shaft weight they are heavy...
The other way i have now gone:I used a early 90's pol. xlt chaincase,cut the brake mount off put a 13 wide hyvo chain in(these are standing up to 300hp + rx-1 engines) with approx 2:1 ratio and 97 700 rmk top shaft,used 800 max axle. (polaris hyvo's fit yamy's shaft).Then we burried the top shaft in the tunnel and rolled axle about 2.5" back n down. used a light polaris rotor and willwood caliper and one piece 9 tooth exrtovert drivers. If you look at frankensled you can see this also. The major reason for this was weight savings if I remember right it took off about 21lbs.and a lot a rotating mass which 1lbs ='s 4lbs .or every pound of rotating equalls four pound of weight. In the mountians weight is huge..
later Rick
pm me if you want more info, heres a couple pics.