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How many turns out did you set the idle mix screws? And did you replace the air cutoff diaphragms?
How many turns out did you set the idle mix screws? And did you replace the air cutoff diaphragms?
82 aspy driving me nuts!
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Just rebuilt the carbs and idle screw all the way in, but she still runs like crap. Wont idle for nothing. I have no vac leaks; checked exhaustively for that. Got fuel, got spark and it'll run if I keep the rpm's up. I synchronized the best I could at 2k rpm, but the engine wont idle, and there is no vac reading on my gauges.
I have the carb-tune device which uses rods (float up and down) instead of mercury or vac "reading" gauge.
Very frustrating.
Just rebuilt the carbs and idle screw all the way in, but she still runs like crap. Wont idle for nothing. I have no vac leaks; checked exhaustively for that. Got fuel, got spark and it'll run if I keep the rpm's up. I synchronized the best I could at 2k rpm, but the engine wont idle, and there is no vac reading on my gauges.
I have the carb-tune device which uses rods (float up and down) instead of mercury or vac "reading" gauge.
Very frustrating.
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Idle Mixture screws should be screwed in to a light seat and then screwed out 1 1/4 turns.
Idle Mixture screws should be screwed in to a light seat and then screwed out 1 1/4 turns.
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DaveO430 wrote:
DaveO430 wrote:
I bought the Randakk kit (excellent) and replaced all orings and air cutoff diaphragms. I'm on the verge of taking them out and tearing them apart again to see what I can see.How many turns out did you set the idle mix screws? And did you replace the air cutoff diaphragms?
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keithg64 wrote:
keithg64 wrote:
I thought on the 82 it was 3 turns out from seating? Anyway, no matter where I set them, she wont idle.Idle Mixture screws should be screwed in to a light seat and then screwed out 1 1/4 turns.
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I have my idle screws turned out 2.3/4 from lightly seated.
the problem is with today's fuel, there's so many additives the older bikes aren't made to run on them. The molecules in
E-10 and E-15 are 25% larger so bigger jets are needed to make our bikes run like they did back in the early eighties.
It's like adding more oil in your two smoker dirt bike, it leans the mixture out and the same is said for adding ethanol and all the other additives in today's fuel.
One size larger on the slow jet and on the main jet will makeup for these additives, I even like to shim the needles with a .020 washer to get rid of mid range stumbles and pinging.
I have my idle screws turned out 2.3/4 from lightly seated.
the problem is with today's fuel, there's so many additives the older bikes aren't made to run on them. The molecules in
E-10 and E-15 are 25% larger so bigger jets are needed to make our bikes run like they did back in the early eighties.
It's like adding more oil in your two smoker dirt bike, it leans the mixture out and the same is said for adding ethanol and all the other additives in today's fuel.
One size larger on the slow jet and on the main jet will makeup for these additives, I even like to shim the needles with a .020 washer to get rid of mid range stumbles and pinging.
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The idle screws all the way in will cause your bike not to idle.
The idle screws all the way in will cause your bike not to idle.
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cyclewizard wrote:
cyclewizard wrote:
They aren't screwed all the way in, what I meant is that to get the proper number of turns, you seat them lightly, then 3 turns out from there. I've tried all those combination's. I must have missed something in the rebuild I think...But i was super anal about doing this. I'll have to see.The idle screws all the way in will cause your bike not to idle.
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So did the bike sit for a number of years and the carbs gummed up on you?
So did the bike sit for a number of years and the carbs gummed up on you?
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cyclewizard wrote:
cyclewizard wrote:
Yea, I traded my old gmc for it. She sat around for the last 3-4 years, but had fuel-stable in the tank. When I got it, it wouldn't run right, so I rebuilt the carbs (they needed it!) and here I am.So did the bike sit for a number of years and the carbs gummed up on you?
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