73' CR400 Fork upgrade - which fork....?

I understand that people upgrade the forks on the early 70's Huskies ... Is this really of benefit and which fork is the hot choice?

I have not pushed my bike around a track yet so reserve judgment of my 73' forks ...

Thank you.

Are they black leg forks? My 72 CR250 was upgraded to later black leg forks with Fox mods.

Yes rebuilt 73' black leg forks - what do the Fox mods consist of?

I'm not sure as I haven't had them apart. Only external thing is air caps. Both have Fox Fork decals in them saying they were modded by Fox. It also has a laydown kit with Fox shocks, gas not air. Its in storage, I'll see about a pic soon. Anyone else know what the Fox Fork mods were for black legs? I assumed springs, air caps and maybe dampening mods or rods?

Small world... I just bought an MJ framed mystery bike and it has a modified frame with lay down Fox gas shocks, and air caps on the forks with Fox stickers! Busily trying to figure this bike out.

Send them my way! I have two sets with no rust, 76 WR360 and 76 WR250

That confirms what I had heard. I will look out for a pair.

Among black leg forks, I believe there were early and late styles there, too, with slightly different heights of the ribs, and short and long slots for the tab to accept the brake drum. Perhaps one of our "black leg experts" can clear that up so we know what to look for?

As for AHRMA, word is we can use any 35mm Husky fork as long as it's NOT leading axle and IS limited to 7" travel.

Thats very very good... what a wealth of information.