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Old 11-12-2013, 11:53 AM
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x-bird x-bird is offline
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Join Date: Oct 2011
Location: Penciltucky
Posts: 2,518
Default plug reading ....

Been dealing with the carb/fuel issues on the 250 and finally seem to have it pretty close to beaten.

After i added the fuel pump, it's running much better, but completely dies out if i try and run up a small steep incline. bogs out to the point of stalling. i'm thinking float level on that problem.

other issue is getting a good read on the plugs. the last one looked really rich after i added the pump; prior to that it had decent color. only change i've made so far is to drop the needle back down two notches to lean it out.

for test reads, i can't go WOT then cut it with the auto clutch, so my plug pics are pretty much from running about 10 minutes and show idle start, run and idle/shut down.

first two pics are prior to needle change and without pump.

3rd/4th pic is with needle moved and pump installed.
seems to have a strange pattern to it as far as only getting color on the front and it's kind of dull powdery looking.

also getting more off throttle backfiring.

right now, i have plenty of jets to take it leaner, have to get more if i need to go fatter.

i'm almost inclined to go fatter with it, but not too sure. ????
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