1982 YZ100 Motor Rebuild

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1/13/2019 8:44 PM

I bought this bike last January, over all it was all there. I cleaned it up and did few hot laps with it in the open field. Then it sat for awhile.
In October I went to MMX track with my son and friends, it happened to be a vintage day. I did three laps and it quit. Went from wide open to nothing. It did not seize, it still turned over. I just parked it and rode a different bike for the day.
I found the rod bearing had disappeared, but other wise no damage. I decided to get a new crank, replace all the bearings and paint the motor. This is why I am posting.
I decided to get a Cerakote coating. I just got it back and started the rebuild and I am very happy. It is a thin coating and very strong. Got the lower end assembled and no scratches or knicks. I usually seem to knick or scratch things. Can’t wait to see how it holds up to the elements. Photo
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2/7/2019 8:45 PM

I just picked up the barrel and head. The Cerakote finish looks great. Should have it running this weekend. Photo
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2/8/2019 4:22 AM

what bore and/or piston did you end up with? I'm doing a complete engine rebuild that requires a larger than 4th over piston/rings. I have a Wiseco piston/ring set of 0.060"(#P455P6) but debating going larger to Wiseco 0.080"(#455P8).

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Larry Navarro - Spring,TX. Damm glad to meetcha!

2/8/2019 5:24 AM

My cylinder is at second over. I did not do any motor mods to get more power. Just wanted to get it back running and looking better/good.

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2/10/2019 8:01 PM

I got the motor complete and installed. No extra parts! It runs a shifts.
The Cerakote finish is not as shiny as the frame or original motor paint but looks good. Once I give it a good shake down, I will paint the frame and swing arm.
Work in progress! Photo
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2/11/2019 5:32 AM

What???

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