DT1 MX project

The bearings are ordered, so I'm getting some of the other parts ready. I removed the transmission from the engine with the damaged cases, and need to clean and inspect it for the new engine. After removing the transmission, make sure all of the shims and there. Sometimes they will stick to the bearings in the cases.


Here is the countershaft ready to clean.


I lay everything out in the order it came off the shaft, putting the side down in the direction it came off the shaft. On an old 2 stroke the transmission will likely be the cleanest part of the bike inside or out, so doesn't take much to clean. I used dish soap in hot water and a toothbrush. Cleaning is where you'll usually notice any excessive wear or damage.


After the parts are cleaned I lay them out to get ready to reassemble. I print out a parts diagram, this one from Boats.net where I get most of my OEM parts, and label everything to make sure it is all there and in the right order. Use oil anywhere metal touches metal when reassembling.


Here is the countershaft back together.


The rest of the transmission is cleaned and ready to drop in.

Fifty Years of Kicks

I posted this 2 1/2 years ago when it came out, but it's well worth another look.

'72 Yamaha street machines

DT1 MX project

I really liked the way it looked on the DT flat tracker, so I glass beaded the cases.


Also as with the flat tracker, I tapped the transmission vent to 1/8" NPT to use a metal fitting in place of the stock plastic push-in vent.


I left the three blind plugs in place, since they were in good shape, and that area can be cleaned from the inside. The paint stripper didn't hurt them, and a taped over them for the bead blasting, although the glass beads just bounce off of rubber anyway. One thing I found the Rust-Oleum paint stripper worked great for was removing the left over case sealant between the two case halves.

R5

Mule Motorcycles R1

Source: Cycle World via MPOTD