My puch free spirit was doing nice with a proma gp, bing 14 (72 jet) and a high comp cylinder head - i was doing around 32-34ish with a slow low end...well, i ordered a bing 15 (82 jet) w/intake and now it bogs/chokes at 27ish...i tried even with out my high flow filter same thing. I haven't messed with jets just yet, does it sound like i need to go down in jets in the new carb? or should I slap the 14 back on? I thought the bing 15 would give me more air allowing a better low end.
thats a huge difference in the jets. jet down gradually until you find what you need.
downjet. probably a 72 or 74
people should learn the basics of upgrading before just buying stuff thinking its bolt on.
downjet and you'll be fine.
dude, come on. everyone has to start somewhere. not saying you arent right, but i can remember when i posted that same question about my dellorto when i first got it. thats how we learn.
well, i did, 72, 70, and now a 66...still same problem....if i gass it all the way, it really bogs, but if i go 3/5ths of the way, it will go up to about same speed as before....i did a shitty plug chop on the way home - i got it to top speed on 1 block then killed the engine, darker mocha color on spark plug (not a new plug) - should i keep going down?
I thought going with bigger bing would mean going to a bigger jet?
62 was the worst, 64 improved and 66 was good
the 62 felt like not enough gas is getting in....i don't have a 68 jet but i have 66 70 - could that 68 be crucial? could my needle have something to do with not getting the gas when i throttle it fully (its all the way down!)?
well, i put the 72 again, it seems better then 66 now that i think of it...but my needle only run the moped if it the jet needle is on first setting making the needle sit higher up
do a plug chop with a brand new plug. thats the only way you can get a good reading. once you do that you should have a better idea of whats going on and go from there.
nice work keep it up.
air leak?
i should check it....but my compresion was originally 120ish....i threw a high comp head on it, and it went to about 175ish after one crank, and went around a couple times and almost hit 190-200ish...
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