Automatic registration

Sorry for the long delay, Its a Rotax 500 with electric start in a modded 79 frame, what looks like an air filter is the oil tank.

Mmm, I need new glasses !

I built it for the twinshock trailfinder event held in the Spanish Pyrenees each year

bullet proof husky chassis and a bullet proof Rotax powerplant. doesnt get any better than that !!

I need some advice with a 78 390 AMX that's dropping out of drive, the main shaft and gear are new, so its not that.
It seems to drop out of drive when its in a higher gear, is that the free wheels ?

Isn't it the gear that engage the other gear on the axle when you engage the D what is worn ?

the 390 has a cable that releases the gear and its pushed on to the shaft buy a spring, I am happy that this is correct and working. Before I replaced the shaft and gear it would jump out of drive
as soon as you opened the throttle and it made a noise. now it will drive until its in a higher gear then suddenly no drive.

You will need to take it to pieces again, it is probably a freewheel(sprag clutch) given up, how fast when you loose drive?

I have had it all apart again and reassembled it and it now seems ok, one thing I will change is the gearbox sprocket, mine has a 14 T and I noticed in
all the parts books it came with a 12T

Are you going up to Northumberland for the Vinduro event?

Its a long way from sussex but its something I would like to do one year.

I don't know if any of you Auto pilots have done something like this before but I made up this fixture to re groove the clutch shoes
then screw cut them on a 3mm pitch. the outer holes are tapped 5/16" and are 4 degrees Clockwise (not CCW) to the inner 1/4" tapped holes .

Sorry that should be 1/4" tapped outer and 5/16" tapped inner holes

New

"Its a long way from sussex "

its like 5 - 600 kms? I slipped up to yass for a Vinduro...600+ Kms...left at 6 was there by 1.00 pm for lunch!!

OOOHHH its in England...probably quicker to ride a bike in that traffic

Sorry... just love to promote the wide open spaces of Orstraaalia

The Hot Trod is a fair trek for me too (in the SW). But it's well worth it. Awesome weekend last year. The Auto behaved itself too.

Have we a discussion on spring weights /colors and what was stock /and preferred setups .
Got the 420 apart atm .
Has green 4th
Plain 3rd
RedDy orange 2nd gear

Just putting this out there: I have acquired a 1982 420AXC frame with Washington State title. I would be willing to part with it for a price if someone needs it for their restoration. Private message me if you're interested.

Yea interesting

Here is my 1981 420ae that will be my next project just getting replacement parts for it like a new seat cover headlite fenders ect.Thank you Michel for posting the tear down and the 8 pages from the manual I for one really appreciate it.Its hard to get to excited about working on it when its 10 degrees outside so i will ride my other auto

I have an AUTO just like that only with a shorter track . 2013 800RR