st400 attex

[bigdog62]

i just bought one needs some ork has a sachs sa-2-440 motor
don`t know anything about them any pointers


thanks Lyle

[Don]

Congratulations, Lyle;

The ST400 is a very nice machine: ABS body, T20 transmission, and #50 chains. The Sachs isn't stock, but if you want a two-stroke it's not a bad choice. If I remember right, the 440 was around 34 HP. There are a bunch of us on this site with very similar machines and we'll be glad to help if you need it.

[bigdog62]

Thanks i also got a sachs sa290 with it it runs after i messed with the points i`m thinking of puting in the 290
any thoughts on that.

[jpswift1]

Thanks i also got a sachs sa290 with it it runs after i messed with the points i`m thinking of puting in the 290
any thoughts on that.

Ditch the Sachs engine. Find a JLO/Rockwell 400 or 440 or a Cuyuna 440 and you'll be much happier with it. Plus the resale value will be much higher.

[bigdog62]

i have to stay with sachs i`m on tight buget you know how that is

[bigdog62]

Put new bearings on all axles and chains hooked electric motor to run to it runs smooth and quit trans works as should
Any other things I need to look for

[racerone3]

St-400 is a pita machine to adjust the rear chains on. remove a couple of the bolts holding the engine/trans cradle to the frame... I usually only run 2 bolts per side. It doesn't make the bolts any easier to get to, but there are half as many. Both my racer and my tank trainer are set up this way and I have had no issues.

[bigdog62]

Pulled tub apart a lot easer to set from in place and mount the tank how would you put back together
Rivets or staples

[smudvapor]

Pulled tub apart a lot easer to set from in place and mount the tank how would you put back together
Rivets or staples

I use self tapping machine screws and then cut them off so they don't stick out, that way if I ever want to take the top back off I can. Also, I bought an Attex last week and it has a Sachs SA280 and it runs really well. I took it out for a quick ride the other day and I was very happy with the way it ran. I had to mess with my ignition also and mine had a Bosch which is the same as the JLO so it isn't very hard to figure out.

[bigdog62]

Thanks that's great idea was messing with 440-c I have got it running it runs good which one would hole up better
290 or 440. Thanks

[bigdog62]

having problems with 290 seames to have good spark then will stop sand points agian and good spark going round and round with it