Hi yall
So I've rebuilt the carbs with the rebuild kit using the 48 pilot and 142 main. I am at sea level. My issue is I can find a good idle. Seems to be flooding. I have the fuel mixture screw set to 1.5 turns out. So I try and get a 45 pilot jet?
@Matthew Tipton first youre going to want to know everything here before you proceed - https://shoptjbc.com/community/brutalforums/topic/176621/tuning-your-carbureted-honda-shadow-everything-you-need-to-know
@TJ
So I've have gone by the sheet and videos. Was still running rich. Coorect me if i am wrong,I figured out that since im running a shorty choke knob and my factory choke has a needle on it I cant use the short choke knob. Is there a work around that you know of?
@Matthew Tipton @Matthew Tipton no the shorty choke knobs do not have the pin on purpose, theyre fine. theres somethign else going on. whats your intake/exhaust/ ignition wire/plugs, you havent mentioned any of that.
you should be way richer on tuning if youre at sea level running stacks and open exhaust.
@TJ so i have the backdraft exhaust and velocity stack. At sea level in savannah,GA I've replaced the ignition wires going to the coils and new spark plugs and plug wires. Have good blue spark. At 2.5 turns out it runs super rich at idle and it jumps between 850 rpm and 1000 rpm. I've tried taking it down to 1.5 turns out but can't get it maintain a idle at 1200rpm. It'll jump between 1100rpm and 1300rpm. Checked the spark plugs and they are black and wet with fuel. I know its probably something simple im missing.
@Matthew Tipton what year of bike?
@Matthew Tipton heres what i'd check - .
- Float height is too high or float valve isn't sealing
- Vacuum leak at the intake boots
- Pilot circuit passages still partially clogged
- Mixture screw O-rings installed incorrectly
Another user install error i see a lot. Verify the order: Spring → Washer → O-ring
- Fuel screw setting - you should be between 2.5 and 43 turns out at sea level.
- Check petcock and vacuum diaphragm- If fuel is leaking through the vacuum side of the petcock, the engine can ingest raw fuel and run stupid rich. Pull the vacuum hose off the petcock if you have one. If you see fuel in that hose, you've found the problem.
The biggest clue is black wet plugs. A 48 pilot that's merely one size too big usually gives you sooty plugs. Wet fuel-soaked plugs generally mean something is dumping extra fuel into the engine beyond normal jetting differences.
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