OzVMX Forum

Clubroom => General Discussion => Topic started by: Doc on July 18, 2008, 10:00:43 am

Title: sprocket machining
Post by: Doc on July 18, 2008, 10:00:43 am

how easy would it be for someone to mill back an alloy 530 sprocket to 520 width? I've scored a nice 48T for the rear of the F11 but it's 530. Easy enough job or should I just buy another sprocket which I can probably get for about $55delivered? Thing is, it's in the US and the 530 job is in my hot little hand?

Title: Re: sprocket machining
Post by: YSS on July 18, 2008, 10:25:24 am

I have done it before , but you need to get a good hold on it . Its very tough  material.  Probly easier to get a 520 blank from Titmans.

Title: Re: sprocket machining
Post by: Doc on July 18, 2008, 12:17:31 pm

mmmm doesn't sound like much fun, thanks Walter..might be easier and cheaper in the long run to get the other that is correct pitch  ::)

Title: Re: sprocket machining
Post by: oldfart on July 18, 2008, 04:07:52 pm

chris - Do you know anyone with a lathe and face plate    - machine one side , then do the other .

Title: Re: sprocket machining
Post by: Doc on July 18, 2008, 06:30:43 pm

oldfart, I thought maybe I could borrow yours! :P  :D seriously I don't know anyone with such and to pay at a shop will probably cost the same as the proper sprocket. If I had several years spare I'd file it by hand  :D

Title: Re: sprocket machining
Post by: brent j on July 18, 2008, 06:35:20 pm

Post it to Darwin and I'll bring it back when we come down

Brent

Title: Re: sprocket machining
Post by: Doc on July 18, 2008, 08:45:46 pm

Thanks a billion squillion Brent!!  :) I actually have 2 but just the 1 would be great. Was thinking of taking the F11 to Conondale. The inner rotor ignition left the US this morning destined to land on my doorstep in about 10 days, the replacement kickstart and shaft have arrived. The gaskets are here and it's all looking good  ;D compared to the other night when everything I touched on the same bike turned to shit >:( first I fitted the sprocket and noticed something was wrong. The wheel was off so I replaced the well worn tyre. I fit it and go away to ponder the sprocket problem only to return an hour later and find it flat as a pancake  :( Off with the wheel again, I replaced the tube with a 'good' used item only to find it leaked from a tiny banana split at the base of the valve stem :-\ sooooo, I replaced the tube again and it was all swell only when I sat on the bike I find the tyre is too big and crashes into the inner rear guard when the suspension is compressed more than a couple of inches..I still have 2 more inches of travel I'll definately need! >:( Needless to say the tyre will come off for the 4th time tomorrow and I'll have to hunt up something smaller to fit. I love this shit!!  ;D

Title: Re: sprocket machining
Post by: brent j on July 18, 2008, 08:50:33 pm

Send them both Doc, it'll save you in the long run

Brent