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| 150cc GY6 and Under Engine Tech GY6 and Smaller Technical Discussion Forum |
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#1
12-08-2012, 04:57 PM
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Idling issues
Well i just installed my uni, exhaust, head, camshaft, and 130 jet. now i am having idling issues. if i disconnect the fuel line, it seems to start up and run, but i need to feed it some throttle to start. i fixed my float, as that was an issue. the pin for the float somehow came up missing, so i made a makeshift pin out of a finishing nail. Now it still seems to be having the same issue, except it doesnt pour the excess fuel out of the top of the carb. When i reconnect the fuel line, i can get it to start after feeding it a little throttle, but it wants to die out. and after a few minutes it just starts running crappy.
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Trailmaster XRX 150  TK Variator and 1500 Spring  SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust  Hammerhead 250GTS White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust 
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#3
12-10-2012, 06:12 AM
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Well i adjusted the idle mix screw, but no luck. It just doesn't want to start and stay on without feeding it some gas. I dunno, im not a mechanic. I guess i will call tom again today and get his input. Also i stepped up to a 130 jet with all the mods. Is this a little high? I believe the stock jet said 111 or 114 on it.
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Trailmaster XRX 150 TK Variator and 1500 Spring SYC Performance Ported & Polished & Shaved 2 Valve Head, A-10 Camshaft, R2C Filter, and Hammerhead Exhaust Hammerhead 250GTS White Torque and Clutch Springs, 18g Rollers, R2C Filter, Ported Polished and Shaved Head, Hammerhead Exhaust
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#4
12-10-2012, 10:02 PM
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That's main jet for WOT.
Sounds like you're dealing with pilot jet issues. What do you have in there now? Stock was 35 I believe. Mine worked best with a 38.5 pilot. Easiest way to adjust idle mix screw is to raise the RPM by turning the idle speed screw to around 1150-1200 RPM (just below clutch engagement) And turn the screw in or out 1/4 turn at a time untill you get the maximum SUSTAINED RPM. HINT: blip the throttle a couple times between adjustments and let the RPM "settle in" before you adjust again. This allows the new setting to take effect. If you're like 3 turns OUT, go to the next size jet up. If you are arround 1 turn OUT, go to the next jet smaller. This usually works pretty well.
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#5
12-11-2012, 09:24 PM
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Hey xlint89 how rare is it to need to upsize the pilot jet. All I've done to my gy6 b series is redneck intake with 4 inch inlet pod filter, opened up the exhaust to about 1.25-1.50 inch outlet. Changed the cvt over to koso hi performance. But I have to back my fuel/air mix screw out 4-5 turns to get it to allow me to accelerate, it will idle fine at 1.5-2 turns out but give it gas and it dies.
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You Can't Fix Stupid It Is What It is A Country Boy Can Survive
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#6
12-12-2012, 04:21 PM
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Are you backed out 4 -5 FULL turns, or half a turn? If you are 4 FULL turns out, then i would go DOWN 1 jet.
Turning the screw OUT should allow more air in, thus leaning out the mix. Ideally you want to be close to 2 full turns out. Have you checked to see if yiou have an adjustable needle? If so, try moving the E clip up to lean out the mix, and down to richen it up.
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#7
12-12-2012, 06:09 PM
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You know your right. I was looking at it backwards. Maybe I'll try that. My issue didn't start till I cleaned my carb and like a d.a. I cleaned the pilot jet with a torch tip cleaner. Do you happen to know what size stock is, I'll replace it with a new stock size and see what happens. Thanks for the insight friend.
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You Can't Fix Stupid It Is What It is A Country Boy Can Survive
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