Just got a 1973 400CR a little bit of mystery to me

They guy I got it from doesn't know bikes. thought he had a 125.

I think it's a 400CR, frame is MK0083 and engine is 2030 1024

It's pretty beat but mostly there. The mystery is the swing arm. It's aluminum and definitely not a stock swing arm that I've seen. It's a welded box swing arm, pretty modern looking.

I don't know a lot about Husky's but do know old bikes and old dirt bikes.

Any help is appreciated!!!

If this is the wrong forum, sorry!

That's a neat looking swing arm. Based on the brake plate arm extension the swing arm is a little longer than stock. Sorry but I don't know what it is or where its from.

I agree that its a 400cr, 1974 according to my data. Frame number is certainly low.

Another interesting item on your bike is the intake manifold. Is that a reed valve? Whatever it is its not stock. Post some close ups I'd like a closer look.

I was wondering about that intake manifold also, it looks "homemade" but nicely done. It doesn't look like the oem ones I've seen for sale, it does have reeds. I've attached pics of it and the length of the swing arm from the center of the swing arm bolt.
and thanks for the help! I love finding out things about the old bikes, and the more unique the better.

click on an image it will get bigger-

an old Mossbarger reed assembly perhaps? They were building stuff for Huskys way back at that time.

http://www.mossbargerracing.com/product1.htm#HUSKY

Cal-Fab, Pro Circuit, ProFab or some other outfit for the swingarm maybe?

contact for posible leads
http://www.vintagehusky.com/



http://www.cafehusky.com/threads/twin-shocks-alloy-swingarm.4422/

I emailed vintage husky, he didn't know. I have also emailed KLPRacing as I don't think Novation is around any longer. I have not heard back from him.

and thanks for the Mossbarger link, haven't heard of them before. The chain tensioner bolts are different than the swingarms in that other thread. I'm going to clean it up some more tonight and see if any marking show up underneath.

Thanks!

The swing arm may have come from Uptite. Check with George, he remembers lot's of stuff.

Karl got back to me from KLP and says most of the swingarms from that era were made by pro-form, even if sold under a different name. Never heard of Uptite, I'll do some checking. Also heard back from Mossbarger, quite possible that it's one of theirs, and they still make the parts. I thought these came with reeds, but this isn't the case?

Nothing from Husqvarna came with reeds until the MAG came out in 1974

Looks like a late 70's Suzuki rm arm.It really wouldn't be too difficult to swap over a jap swing arm if the basic dimensions are there to work with. As for the reed,need a side view to maybe ID it.Check and see if they did any boost port work in the cylinder.

That is not a late Suzuki swing arm. The C2 and later models were much longer than what is pictured. I have a couple of them. Like I said.....contact George Erl at Uptite Husqvarna. He will probably know what the arm is.

Looks like an old euro dirt swing arm.

resurrecting this old post because this bike is for sale! Never got around to do anything with it and need to make space. contact me if interested, located in Portland, Oregon