Axles for IRS

Pinhead

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Sounds like you got a handle on things. I would also try to figure out if the frame is bent and where.
The engine cradle had been cut out and re-welded in order to mount the standard Predator engine so I suspect the PO simply didn't align the axles correctly, causing the toe-out. It does look like this thing was really beat on, though; both front knuckles have been re-welded as well.

I'm fairly new to steering geometry so it took me a couple of tries but I got rid of the bump steer while also getting close to Ackerman steering. I think I can completely eliminate the tiny amount of bump steer by putting the washers on the bottom of the knuckle (between the tie-rod end and the knuckle instead of between the knuckle and the bolt) but I don't think it's enough to worry about currently.

The next thing to work on is figuring out how to make the torque converter drive belt last longer (Comet 30 Series). As far as I can tell everything is aligned perfectly so it might just be a consequence of buying a $9 three-pack of belts...
 

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madprofessor

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I think I can completely eliminate the tiny amount of bump steer
Much luck to you in trying, but remember that a certain amount of bumpsteer is acceptably inherent in long travel suspension. Can't tell what yours is like. Some folks seem to be able to build it out, but you're not building from scratch. Don't get frustrated by being OCD about it. That's my thing.
 

Denny

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How long would you say a good belt should last? Should I be looking at 6 months of heavy usage or 3 weeks?
That is impossible for me to guess. But I can tell you my mb200-2 mini bike it only lasted a few hours with my 3 girls riding it. I got it for them for Christmas and they had to wait until March when the snow melted to ride it. Then had to wait another week for a new belt. And I knew better than to try to use it!
 

Hemiwoodworker

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Used a genuine Chinese belt 2 weeks ago when I race in the GPS 180. 196cc stage 1. We lost the handlebars 102 min into the race up to that point the belt was still good. Plus it was on the bike for the past 3 years I've had the bike. Have your alignment and gearing correct for best results.
 

FlyFrog

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Used a genuine Chinese belt 2 weeks ago when I race in the GPS 180. 196cc stage 1. We lost the handlebars 102 min into the race up to that point the belt was still good. Plus it was on the bike for the past 3 years I've had the bike. Have your alignment and gearing correct for best results.
who was first? I know cars and cameras were 2nd, was it a youtuber?
 
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