Yam xs750 final drive

[triker-taz]

Anyone know how many turns of the prop shaft equals one turn of the back wheel

[Manky Monkey]

Absolutely no idea mate.
Anyone else?

[panthershaun]

Only way I can think of is mark the prop and mark the rear wheel, turn the rear wheel one revolution and count how many turns the prop makes.

[triker-taz]

Exactly what I thought only problem is I dont have a back wheel or a final drive ..It was just to see how close the ratio on the trike was to the original bike..

[brock]

http://www.yamaha-triples.org/library/owners/xs7502d/default.asp


under specs, you were on the right track , just needed to dig a little deeper

[triker-taz]

Thanks asked on there but no one could help me.. I take it then (as I dont really understand it) that its 3.262 turns of the prop to one turn of the wheel. so my axle with a ratio of 3.72/1 (I think) aint far out.. as I think my back wheels (255/60/15) will prob have a slightly larger overall diameter than the standard bike wheel.

[brock]

   I saw your post , it looks like the ratios are close enough to use , it will be interesting to see how much difference there actually is when its finished . I've only done one bike engined one and that was an XS850, fitted a reliant axle and built a swing arm setup, not what I would have done but what the 'fella wanted, quite capable of lifting the front end and out sprinting the reliant that I had at the time , really could have used an anti roll bar of some sort , quite awkward to ride quickly on twisty bits and always felt very tall somehow ,probably would have got used to it in time. 

[toad]

this might help ya a bit more
put your wheels on your axle mark the tyre and floor then turn the prop flange one turn.then mark the floor again. measrure the distance between the two marks!
then do the same with the bike drive unit and wheel. then compare the two measurements that,ll give you a good idea on tyre sizes.

[triker-taz]

Great idea but I dont have a bike wheel and drive..

[BikerGran]

have to 'suck it and see' then!