Sumotrack rebuild

doc_rot said:
Nice. It’s those details that makes bikes good to ride
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Definitely. A lot of return springs are above the brake pedal, and on the XS there isn't much room there. So I've been thinking about it for a while, and the other day I saw a picture of a spring under the pedal. That got me to look at other options which worked out perfect.
 
Modified the battery area to hold a slightly larger battery. Going to switch to an earthx etx18b. More cranking amps with more capacity. It should help with the weak starter the XS has.
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The microsquirt was not playing well with carbs, and it'll be a little while before I go back to EFI. So I used some amazon pertronix clones for a bosch 009 distributor and modified a stock points plate. Have it adjusted for 13* advance at idle. I need to finish making a piece to hold the coils on the front end. But it started on the kicker.
 
The engineering you put into this bike is impressive as hell man, Can't wait to see her all finished
 
Thanks, it's close to being road ready now. I need to hook up a breather, bleed the rear brake and get new bolts for the stator cover.
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This build is bad to the bone man, would love to see a video of it running when you're finished
 
Thanks, hopefully I'll have it road ready in a week or so. Going to rebuild the rear master cylinder and bleed the brake. Hose for the breather should be here today.
 
So I had to get a new belt for my lathe. I don't know how old the belt on it was, it came with the lathe almost 10yrs ago.

Already putting it to use to make new intakes for the bike. I want the carbs to have a little angle, but also didn't want to pay $80+ for intakes.
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Sounds great and looks great man. I love the stance of that bike, it looks like it handles really nicely.
 
Luugo86 said:
Sounds great and looks great man. I love the stance of that bike, it looks like it handles really nicely.
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It handles better than it used to. I changed a few things with the front and rear suspension during the rebuild. It used to be twitchy over 55mph.

It does take getting used to because it is so different from my daily drz400sm.
 
Well small update, the amazon pertronix clones aren't great. The one for the right cylinder died after 20 miles, switched to a different one and it would die after 3 miles, but work again after cooling off, 3rd one was doa. Switched to a trispark ignition and no more issues.

I'll have to do a new seat pad, the one it has is too soft, and the cover is too slick. So you end up against the tank, and basically on the seat pan.
 
New seat pad is done. It's 4 layers, bottom is 8mm "cosplay" foam, next is blue walmart sleep mat, and then 2 layers of extra firm upholstery foam. Original seat pad was a layer of yellow and blue foam that is pretty soft.

Also making a new clutch slave. The x ring seals started leaking at a little over 100 miles, so I got new epdm x rings and put them in. No issues so far, but the new slave will use actual brake piston seals from brakecrafters.
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I've been riding the bike a bit, the commute to work and a 90 mile round trip to a show. Don't know if it would have placed as I left before they handed out awards. They were supposed to start awards at 2:30, but at 2:50 they were still calling for peoples choice ballots. So I left.
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Making some small changes. 320mm rotor, which required caliper spacers and machining the hub 5mm to account for offset.
Next is to rebuild the forks, and reposition the speed sensor.
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