04-10-2008, 07:57 PM | #1 |
Join Date: Mar 2008
Location: Idaho Falls ID
Posts: 59
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Carb tuning help, sputters and pops at speed.
Hello Everybody,
Having a problem with the Shineray, I have done the air box to UNI filter mod and the exhaust has been gutted. Lowered the clip to the bottom slot and installed a 118 main jet. I am wondering if I need to make some adjustments on the air screw as it is in the stock pos. Plug is looking good, tan at the tip to darker brown at the bend. Any help is, as always, much appreciated. Wolf (Been edited for miswording on clip) |
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04-10-2008, 08:35 PM | #2 |
Join Date: Mar 2008
Location: West Virginia
Posts: 629
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Shouldn't you raise the needle (lower the c clip) the enrichen the mix?? :?
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Wayne Wildfire WF300-SP |
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04-10-2008, 09:03 PM | #3 | |
Join Date: Mar 2008
Location: Idaho Falls ID
Posts: 59
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Quote:
Wolf |
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04-11-2008, 08:11 AM | #4 |
Join Date: Jan 2007
Location: Northern Vermont, USA
Posts: 1,242
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With that big of a jet (way too big, IMO) you certainly don't need to raise the needle. You are flooding out the motor in the midrange. I'd drop the needle at least to the mid position, and retest. Personally, I'd ditch that big jet and go smaller, if not stock. All you are gonna gain is less mileage. If you are gonna keep that big jet. I'd start with the needle in mid position, fuel screw out two turns. That sputter is probably the carb trying to transition from the stock pilot jet to the newer HUGE main. Kinda like the old Rochester Quadrajet carbs on the old Chevy 350's, heheh. Matt teh gas, about a 2 second bog...., then hold on! Showing my age here .
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First Chinabike: 2006 Roketa RSX200E Current Chinabikes: 2023 Titan DLX & 2022 Lifan KP Mini w/ 210cc BRT kit, 22 RWHP! |
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04-13-2008, 01:18 PM | #5 |
Join Date: Jan 2008
Location: Seligman, AZ
Posts: 107
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Yeah WAY to big. Anything over a 115 at sea level with lots of mods is way to big. you can drop 2 sizes for every 1000' elevation if I understand Keihens service manual. A 115 at 0' elev is a 103 at 6000'..
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