Sachs Minibike

[itsid]

I've never seen anything like that in my life.....but I can tell you what it is and does.....think pillow block.....

What?? It's just a piece of tubing to hold the bearings.

that's what he said.. pillow block (as in bearing retainer)

This silver thing

's large isn't it ..

but maybe the bearings are huge too..

'sid

 

[denhammotors]

They are standard 5/8" bearings. I think the OD is 1 3/8". I don't see what all this confusion is about.

 

[Poboy kartman]

They are standard 5/8" bearings. I think the OD is 1 3/8". I don't see what all this confusion is about.

Nobody is really confused.....I simply answered a question......but if you're wondering why it was asked and answered the way it was.....try to find one that looks even remotely similar on a different kart or mini-bike......

 

[denhammotors]

Nobody is really confused.....I simply answered a question......but if you're wondering why it was asked and answered the way it was.....try to find one that looks even remotely similar on a different kart or mini-bike......

This is what it's from. I took it from a old jackshaft assembly from the Baja I used to have.

http://www.ombwarehouse.com/MB200-231-Baja-OEM-Jackshaft-Assembly.html

 

[Poboy kartman]

This is what it's from. I took it from a old jackshaft assembly from the Baja I used to have.

http://www.ombwarehouse.com/MB200-231-Baja-OEM-Jackshaft-Assembly.html

Well....I guess that qualifies for remotely similar....but what I'm seeing in the pictures appears to be barrel shaped and not a straight tube like in the link.....also the plate appears to be homemade...as well as several other differences....

So...I have two questions: Is the bearing carrier barrel shaped?
And....did you modify it after you took it off the Baja????

I'm not trying to argue with you...but I am curious....do you know how old the Baja was???? Also....we're pretty good about shooting down incorrectly information amongst Senior members....so it's surprising that no one has corrected me......I'm certainly not the most knowledgeable member here....so just because I haven't seen one before doesn't mean they're not out there....

 

[denhammotors]

Well....I guess that qualifies for remotely similar....but what I'm seeing in the pictures appears to be barrel shaped and not a straight tube like in the link.....also the plate appears to be homemade...as well as several other differences....

So...I have two questions: Is the bearing carrier barrel shaped?
And....did you modify it after you took it off the Baja????

I'm not trying to argue with you...but I am curious....do you know how old the Baja was???? Also....we're pretty good about shooting down incorrectly information amongst Senior members....so it's surprising that no one has corrected me......I'm certainly not the most knowledgeable member here....so just because I haven't seen one before doesn't mean they're not out there....

The only part of the jackshaft I used from the Baja was the barrel shaped bearing carrier. The plate it's welded to is homemade. The Baja was probably from around 2007. I don't know since I wasn't the original owner.

 

[denhammotors]

Added a seat. I didn't bother making it look as good as it could be. I just wanted something comfortable to sit on.

Something weird I noticed about the carburetor was that the high/low speed screws can't be adjusted. The engine seems to lean out at high revs. I figured adjusting these might do the trick. When I bought the engine, there were no springs under the adjustment screws. I added some to the high/low so that they could be backed off a little. Runs quite a bit better than before, though performance still isn't ideal. Might have to fiddle around with the adjustment some more.

Really don't like diaphragm carbs . I wish I could get a Bing slide carb, but they are both difficult to find and expensive.

 

[Desertduler]

Added a seat. I didn't bother making it look as good as it could be. I just wanted something comfortable to sit on.

Something weird I noticed about the carburetor was that the high/low speed screws can't be adjusted. The engine seems to lean out at high revs. I figured adjusting these might do the trick. When I bought the engine, there were no springs under the adjustment screws. I added some to the high/low so that they could be backed off a little. Runs quite a bit better than before, though performance still isn't ideal. Might have to fiddle around with the adjustment some more.

Really don't like diaphragm carbs . I wish I could get a Bing slide carb, but they are both difficult to find and expensive.

Those are not adjustment screws they are plugs that lead to the high and low speed jets and in order to change the fuel mixture the jets need to be changed.

 

[denhammotors]

Those are not adjustment screws they are plugs that lead to the high and low speed jets and in order to change the fuel mixture the jets need to be changed.

Wow, thanks.

Now I feel like a total idiot and am further away from having a perfectly running engine.

 

[Desertduler]

Wow, thanks.

Now I feel like a total idiot and am further away from having a perfectly running engine.

No you are not an idiot by any means, You could find a tillotston carb with the same or slightly larger venturi that has high and low external adjustment screws as long as the impulse signal port will line up in the manifold or if your carb has a remote impulse line just connect to it.

 

[denhammotors]

The problem seems to have fixed itself.
I took off the springs and put the screws in just how they were before. No lack of performance now. Just another one of those mysterious carb issues that have no scientific explanation and fix themselves by magic.

 

[Desertduler]

The problem seems to have fixed itself.
I took off the springs and put the screws in just how they were before. No lack of performance now. Just another one of those mysterious carb issues that have no scientific explanation and fix themselves by magic.

Those fiber O-ring gaskets under the plugs keep air from being drawn in the high and low jets and if the plugs are not seated against them the carb will be too lean and you could burn your engine down.

 

[denhammotors]

Those fiber O-ring gaskets under the plugs keep air from being drawn in the high and low jets and if the plugs are not seated against them the carb will be too lean and you could burn your engine down.

Yep, I put the fiber washers back on there. The technique for getting the best performance out of this engine is to keep the throttle in the power band. Any more throttle and it will bog down. Probably because it was used on constant RPM equipment like rammers and tillers, not meant for vehicles. It seems to have great low-end torque for a two stroke, though.

 

[Desertduler]

Yep, I put the fiber washers back on there. The technique for getting the best performance out of this engine is to keep the throttle in the power band. Any more throttle and it will bog down. Probably because it was used on constant RPM equipment like rammers and tillers, not meant for vehicles. It seems to have great low-end torque for a two stroke, though.

I have worked on many of them that have been on tampers and jumping jacks.

 

[denhammotors]

After painting and reassembly. All finished!
I might make a video of it this weekend.

 

[jbe24jg]

two stroke ftw! neat engine, where'd you find it?

 

[denhammotors]

http://www.smallenginewarehouse.com/Sachs.html

Only 4 left! You can't find them anywhere else.

 

[Hursty]

Sweet looking bike

 

[Desertduler]

I really like that little bike!

 

[landuse]

Nice bike. Is the chain close to your leg or not?