One must also take into account that if you have that taller tire, you already lowered the ratio, so using a 45 rear, or a 16/43 is your best bet in that situation. Thanks for remindfing me of that Barry68v10. I believe that is why Odar went with a 16/43, if I remember correctly.  JK. I agree with Greg on the 4 speed conversion, I think that would be a good place to start because of the difference in the transmission ratios.         Hutch

barry68v10 wrote on 12/31/69 at 16:00:10:

But your ratio will change as your tire wears down

Oops, I guess they all do

Savage_Greg wrote on 12/31/69 at 16:00:10:


...and if you're "heavier than...um...more swollen than others"  

govmule84 wrote on 12/31/69 at 16:00:10:


Yeah, I agree with the improvement at highway speed, but where I was disappointed happened on a 2 lane grade where acceleration wasn't possible without really winding a lower gear.  Also, casually entering a good corner in 4th gear didn't allow the same roll-on power on the other side.

What we need are some serious power upgrades to compensate for the lower RPMs.  Maybe that 700 overbore is the way to go.

mpescatori wrote on 12/31/69 at 16:00:11:
I did not need a spacer at the rear on mine, just bolt to rear hub. The chain runs perfectly straight. I'm not sure where you came up with that???? Did anyone else have to use a REAR spacer on their conversion?????  The only way I could see you would need a rear spacer, is if someone bought a rear sprocket with the correct bolt pattern, but it had the teeth in an offset pattern. With the correct, no off set, sprocket you only need the spacer on the trans sprocket to take up the extra room between the sprocket and the washer and nut.     Hutch

I was thinking about the rear spacer thing last night, before I went to sleep, and the only thing I could come up with, was that maybe if you made the mistake of putting the spacer for the front sprocket on first and then the sprocket you would think you needed to space the rear sprocket. As far as the dual sprockets go, I could see one big problem. The shaft on the transmission would not be long enough. You would have to put a spacer between the two front sprockets to keep the chain from hitting the other sprocket. I used a standard width sprocket center for my spacer and had to disc sand the side down slightly to get the splined washer to fit on the shaft. There is no way you could put a spacer between the sprockets and still have enough shaft left to use the washer. I could see no problem with the rear. If you used 2 offset sprockets facing away from each other, but like Greg said, you would need a much smaller rear sprocket to make much of a change, and along with that a shorter chain when you switched to the smaller sprocket. I'm not saying it can't be done, but it would take some work.    Hutch

rigidchop wrote on 12/31/69 at 16:00:11:
 
I guess you missed my point. The width of 2 sprockets on the transmission shaft takes up all the room without a spacer in between to keep the side of the chain from binding on the larger sprocket when using the smaller sprocket. The transmission shaft would have to be lengthened.    Hutch