1973 wr 125

Hello, I'm new to CH. I bought my first Husky recently and am in the process of getting it ready for some vintage MX racing. It's a 1973 wr125. I'll post pictures as soon as I learn how to do so. I bought it as a roller and the motor is apart in a box. I also got a bunch of other Husky parts with the deal, some 250 mag stuff and some later 125 cases, barrel, and head. I'm hoping everyone who has any experience with these early 125s will help answer questions. I don't really know the market for these early parts and am hoping to sell them to help pay for the restoration of my bike. I have two tanks that are both steel and thought it would be better to have a little later aluminum one to make it lighter. Before I spend a boatload of money on an aluminum tank are the mounts the same on a 1975 - 1976 aluminum tank as my 1973? Also I heard that a later 250 mag swingarm is an upgrade in place of the stock 73 swingarm. Thank you in advance, Jay

Hello again, I want to thank everyone for the help and advice they've given to me on my post. Two months and nothing, I guess no one knows anything about early Husqvarna 125s.

you sometimes find that if your initial post is missed first up, you have no responses. or your right and no one knows any thing about your 125

I seldom look at this Forum heading, so this is the first I've seen your post...

I've raced a 74 125 WR since...well 1974...still race it today in AHRMA NA XC
1. I'm pretty sure the mounts for a 75/76 Alloy tank will match up to your 125. I've used 2 Hi Point Alloy tanks on my 125 and swap them to my 75 Mag 250 with no problem. If you have other work to do on that bike...I'd suggest holding off on the $ for the Alloy tank...makr that your LAST purchase.
2. WAY back in the day (late 70's) I fit a GP frame (my memory is it was a 76) needle bearing swing arm to my MK frame 125. Lengthened the wheelbase, used longer Curnutts for longer travel. If I recall, I think I had to trim a mm or 2 from each side of the frame to fit the arm into the frame. Still in place today.
I'm not sure about the Mag 250 s/a.
Good luck with the bike!

Richard, does the '76 swingarm make your '74 bike illegal for AHRMA classic-class racing? I'm asking because I have a couple of those '76 arms.

The combination of that swing arm and the long travel Curnutts definatley result in > 4" of wheel axle travel, which is what AHRMA Vintage rules allow.
So I've had to fit rubber bumpers onto the Curnutts to reduce the travel when I ride an AHRMA Vintage event...no doubt reducing the benefit of fitting that swing arm.
Even a stock 75 Mag 250 (like-design eligible for Vintage) with stock 12" Girlings needs some rubber bumpers to bring the axle travel down to 4".

As mentioned above...I did the mods back in the day...when it was still a modern bike!