1977 Husqvarna 125cr Rear Sprocket

Believe it or not, I can't find a rear sprocket for this bike. I am in need of some advise on what to do about this. Any Solutions on getting this to work? I searched and searched with no luck.

Thanks

Chris, does your 77 have the Leleu hub?
If so, give me the diameter measurement of the center open section.
I have 1 or 2 decent sprockets from the 74 - 75 series...but they might be too small for the 77.

Many folks changed out their 74 and up Lelue hub wheels to the full size Husky hub. That might be an alternative.

You are correct about the LeLeu hub. I have not measured it yet but will. How about the conversion to full size any links or direction as how to do this?

it's impossible !
change wheel !
for a 1978 !

hahah! I know!! I really should but how do i order a sprocket for that? good places or recommendations?

Assuming the sprocket is flat get a blank with the right number of teeth and get a machine shop to machine it to match your original.

The 125's were dished Steve.

I don't know much about the 125s, could you 'build' the dish up with a spacer bolted through the sprocket and hub?

Well you said any solution. Put the sprocket in a lathe and turn off the teeth and say another 3/4 inch. Put another sprocket on a face plate and turn out the middle. weld together with a tiny tig bead. Bang flat as needed. I could put up a picture of a 70 tooth 530 chain sprocket I grafted onto a later husky sprocket than what you are speaking of here. Later I just used a 520 sprocket with an 1/8 inch shim with the 530 chain, that ratio is what I have been using lately. If sprocket specialists is still in existence I would see if they can make one that would be easier.

You think i may be able to just use a spacer for the rear sprocket and use a 520 chain and sprocket kit. I think a spacer would definitely work but do not know where to get one. CNC milling would be the only answer or do they make them already?

I have one of the dished sprockets the Id is 152.5mm it has 9 bolt holes and 53 teeth never been used condition, I am willing to part with it call me or PM

Chris,
A few years back someone was already making a CNC machined billet spacer for the 125's that allow you to bolt up a flat Husky sprocket to your Lelue hub. If I can think of who I will post it.

My spare from a 74/75 is 130mm in diameter, 9 bolt holes.
Dished steel, 53 teeth, 520 pitch.
My guess is the 77 uses the larger Leleu hub.

Measure yours. If you need it, let me know
I won't need my spare. My 125 has a new one...and they usually last about 6000 hard miles...which will outlive me!

isn't it great to know you wont be needing a whole lot of consumables for next years racing anymore.... I got 4 years out of the last set of tyres