husqvarna "OR" & "XC" transmission. ????

When was the last year that husqvarna offered the "OR" transmission? This off road transmission had gears 1 thru 3 that we're wide ratio and 4 thru 6 were close ratio. This transmission allowed awesome bottom end power through third gear and kept the rpm's up in the meat of the power band in gears 4 thru 6. You never had that rpm drop if you weren't going fast enough like we get with a wide ratio transmission when in 4 to 6 gear when up shifting. It had the best of both worlds the wide ratio for the bottom pulling and the close ratio that kept the rpms up at the higher speeds. This was very noticeable on the 250's over the 390 which has more power.

Now what's the difference between a "WR" & "XC" model in 1984?
The only difference I can see that I read about is the XC model had the larger motoplat flywheel? Is there anything else that's different?

Thanks ahead of time. I have a book about husqvarna dirtbikes that covers this but I haven't seen it in 20 years. Thanks again, bigbill

I think '80 was the last OR.... I know from '82 on, XC was WR tranny with CR suspension travel.

The WR has less suspension travel than the XC. WR has lights and brake light and uses the SEM ignition. The fuel tank is probably larger on the WR - not sure. The swing arm is half inch shorter if I recall correctly on the WR. WR runs a chain guard. WR has the speedo drive and speedo set up. WR has a frame rail under the motor for protection when climbing over logs etc. Best thing is to check Halls Husqvarna website and download the parts book PDF and you can find all the differences yourself via parts numbers and the diagrams.

Has anyone built a "off road" transmission using a wide ratio transmission gears with interfacing the 4th, 5th & 6th speed close ratio gears. I wonder if it can be done.

With a 250 we don't get that bog by the rpms not being in the power band like we get with the higher speed wr gears. I was very impressed with my or trans in my older late 70's husky.
The orginal husqvarna engineers and designers were really sharp maybe a head of there time.

too my understanding the OR had WR 1-2-3 gears CR 4-5 gears and its own warp drive 6th gear the frame had the bash bar under the motor and the rear fender loop a motoplat with lighting capabilities [but no lights] and its own odd weight flywheel lighter than the WR buy heavier than the internal rotor CR i guess i should know as i had a 79 250 WR [LECTRON] Super and a 80 250 OR [ ASCH PIPE] NASTY HARD HIT IN THE MIDDLE NOT SO SUPER SNAPPED THE FENDER LOOP OFF TWICE and yes 1980 was the last year

I liked the "OR" tranny. On the bigger bores they just power through anything. The cr 390 was a exercise bike. I lost 60# in three months on it. A dirt bike works every muscle group.

A good rider here on any older husky bike is hard to keep up with. I weened my son on huskys. He rode my '80 cr 250 and my signal in front of the buddys riding the newer kxs was "you take it easy with that old bike" another words hammer these guys.

I guess I can only speak to 1982 models... 125XC and 125CR have identical trannies, 250XC and 250WR are the same and 430XC and 430WR have same. This is from specs, in 1982 Husqvarna Racing Handbook.