update, another request for help with two docent setups:
gnarly woods pipe with pro circuit
new reeds
clean filter
138 main
38 idler
2nd clip from the top
15-17mm float height the carb is worn
2 turns out on air screw
no air box lid
40:1 Lucas semi synthetic
results: starts fine, runs very well, great pull and acceleration,
but only 20mpg, (this is my main concern )
on a dirt road ride around 20-45 mph, for 80 miles with some street and trails mixed in.
this is the plug after eighty miles:
(true color is perfect biscuit tan both on insulated and electrode)
BUT WITH-
stock pipe, stock arrestor:
new reeds
clean filter
138 main
38 idler
2nd clip from the top
15-17mm float height the carb is worn
2 turns out on air screw
no air box lid
40:1 Lucas semi synthetic
results: starts fine, runs well, expected less pull and acceleration
but only 18mpg, (this is my main concern )
this is the plug after 30 miles trail riding:
(true color is very light tan to gray both on insulated and electrode)
the gnarly pipe and pro circuit appear to be a better combination for plug color, than the stock pipe and arrestor , with the same jetting?
... edited,....
aha ! I thought the second picture was the beginning of lean, but it turned out to be the edge of RICH, as the next test with
142
42
2nd clip from top
and 2 turns out
showed in this test ride picture:
which is clearly on its way to carbon/oil fouling.
OK, cool, I'm just surprised that the rich (second picture) is so white instead of going black from the change of gnarly pipe to stock exhaust.
OK, so this means I need to lean it out even more for the stock pipe ... like:
135
35
2nd clip
2 turns out
I'm just afraid of getting that close to what people usually call a lean setup.