Roadkill,
Your welcome. I almost went to work for TI in 1967 after I got out of the USAF but chose IBM instead. Spent 30 years as a mainframe ( now called the Cloud ) System Engineer.

If you google 167fmm or CG125 you can find lots of info on the DF engine. These are nice simple bikes.

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Off to the dump/recycling center with another load.