Test Run The YZ80
After getting the top end re-assembled we gave the nasty carburetor a bowl cleaning. This is how it looked before.
Filled the gear case with 10W-40 Racing oil, the proper amount is found on the engine case.
We put on the exhaust pipe, filled the radiator,
and the fuel tank and put in a couple of quarts of a slightly heavier fuel/oil mix to be sure top end was adequately lubed for break in.
The bike fired up after around fifteen kicks and run for five minutes at various RPM levels. No over revving here, just slowly bring up the engine revs and hold for a few seconds then let it idle down. Cut it off to cool for fifteen to twenty minutes and did it again. After the first run and each cranking after she fires right off on two kicks or less once I figured out to give just a little bit of throttle while kicking it over. We did this several times to begin with. Finally it was taken for a little ride without putting it under a heavy load but also not lugging it around. After a couple times we got on it moderately going through the gears to be sure transmission was in working order. The next day I couldn't resist one good blast around on it before disassembly of the whole motorcycle, the little YZ 80 pulled the front wheel off the ground with no effort at all...much to my surprise as I didn't mean to do it. Back in the shop with it to begin the tear down process.
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