I had the same problem with the set screws loosening on my jack shaft and came up the the tubing spacers for the bearings as a solution too......I used a quick disconnect adapter with a sprocket ground down to fit my chain and it does not move at all once it is thghtened up. me
On 11/5/07, Jeffrey Blamey <[EMAIL PROTECTED]> wrote: > I have been using the same surplus center sprockets with the stock rear > sprocket (47t) and no modification to the drive sprocket, do not see any > wear issues. Of course I am using a jack shaft that allows me to run the PMG > in the correct rotation, that one has #40 chain and sprockets, which seems > to stretch a bit more that the #50. A trick you can use if you find yourself > needing to use a jack shaft is I made spacers out of steel tube to keep the > sprockets and bearings in place, the set screws would loosen and allow the > sprocket to move out of align, the key could also move... so with spacers > with the correct ID keep the jackshaft bearings and sprockets all lined up. > The jack shafts I used are available from Northern in 1/2" and 3/4" and come > with two bearings and mounting plates. The drive sprocket is actually in the > stock position it would have been with the ICE. My motor is above the > jackshaft (just in front of the pommel of the seat/ the rear of the gas > tank, and made it possible to maximize battery space. Cheers, Jeff > > On 11/5/07, damon henry <[EMAIL PROTECTED]> wrote: > > > > There was some talk about sprockets on the EVDL a couple of weeks ago and > it was pointed out that surplus center ( > http://www.surpluscenter.com/sort.asp?UID=2007110512354268&catname=powerTrans&keyword=PH50) > has #50 sprockets with hubs for only $5 a piece. It was mentioned that > these will work on 525 chain if you grind down one side of the sprocket to > make it thinner. At only 5 bux I figured even if it was bad advice it > wasn't much risk, so I might as well give it a shot and ordered a couple. I > have been riding with a 14 tooth front sprocket and 41 tooth rear for a > number of years now, and have always been interested in trying a lower gear > ratio. I took my first ride with a 13 tooth front sprocket this morning and > liked the results. I have a couple of steep hills near my house with stop > lights on them, and when my pack is getting low and I get caught at the red > light, it can be a struggle to get up to speed. This new ratio felt > stronger up the hill, although I did not get caught at the light. I still > have to get out on the freeway and see how it affects my top end, but I am > interested in trying a couple of different ratio's. At 5 bux a pop it's > fast, cheap, and easy to do. > > > > damon > > > > ________________________________ > Windows Live Hotmail and Microsoft Office Outlook – together at last. Get it > now! > >
