TC90 Blazer part 5

Getting a start on new seals and some clean up on the TC90 engine, it really isn't too dirty for an old 2 stroker.




Cleaning the gunk off.


Clutch removed and rotary valve opened up.


The right side crank seal is in the outer part of the rotary valve assembly.


Pretty typical of what you'll find on an engine this old, the seals almost shatter when moved.


I picked up a TS90 seal kit on ebay for $12. Apparently the TC90 and TS90 use a different front sprocket shaft seal, so I left that seal in place for now, but otherwise they are all the same. I've found parts are fairly easy to find for this bike. The clutch basket was somewhat loose on it's gear, and I don't know if that is a big concern or not, but I bought an NOS one for $9, also on ebay.


This is the left side with the crank seal removed. This engine only has a little over 800 miles, and I couldn't detect any play in the crank bearings, and no sign of any corrosion, so no need to split the cases or go any farther into the engine. You can see the oil feed for the left side bearing in the top of the picture.


The oil injector pump.


The clutch cover/carb housing was scratched up, so I decided to strip the paint and clean it up some.


I used a paint stripper, then a palm sander to smooth some of the deeper scratches, then wet sanded with 400 grit paper.


Then buffed it out with car wax and a non-scratch Scotch-Brite pad. I really like the finished look it gives, and takes a small fraction of time compared to a full polish job. It looks dull here in my basement, but great outside in the sun.


Back in the frame, starting to look like a motorcycle again.


I had an old pod filter that fits the cover, and will likely go this route instead of using the stock airbox.