bogging acting like choke is on

dwint51 · 03-10-2015, 09:29 PM

my scooter has been running great then I think I might of got some premium gas with ethonal.this is whats happening.its sputtering like the choke is on or a bad plug till I hit a down hill and once it gets to 8000 rpms shes fine and will do over 50.i have a bbk,pipe and jetted to a 80.my pipe always wakes up at 8000 rpms but it cant get there unless I get a down hill and once it hits that mark it will scream until I let it go below the 8000 rpms.it starts right up also but sputtering till those rpms.changed plug also

Firehawk989 · 03-11-2015, 10:01 PM

Could actually be the choke not working right if you have a carb with electric choke.

Otherwise sounds like something in your carb is either out of adjustment or possibly clogged. I would check the pilot jet first.

Also an 80 jet sounds a bit small for that setup, how do your plugs look? Nice and brown, or white?

dwint51 · 03-12-2015, 07:43 AM

I fixed it.it was the carburetor boot to the air cleaner had a crack in it.i tried a 85 jet and ran terrible the 80 is just right.actually the 75 worked fine but more rpms with the 80 and my gas mileage sucks I also have 1500 rpm clutch and torque springs

Firehawk989 · 03-14-2015, 01:31 AM

Ah yea that would do it.

Your carb is probably different than mine, so I guess it makes sense that the jet size would be different too.

03-11-2015, 10:01 PM	#2
Firehawk989 Join Date: Mar 2013 Location: Vancouver, BC Posts: 198	Could actually be the choke not working right if you have a carb with electric choke. Otherwise sounds like something in your carb is either out of adjustment or possibly clogged. I would check the pilot jet first. Also an 80 jet sounds a bit small for that setup, how do your plugs look? Nice and brown, or white? __________________ 2005 Yamaha BWS (Zuma) "Garfield" TP Black Trophy 70cc, Giannelli Reverse Pipe, 5g Dr. Pulley Sliders, Delta Clutch with Yellow Springs and Yellow Contra, Malossi Torque Controller, Naraku R-Vent Bell, NCY Adjustable Secondary Sliding Sheave, CF Reeds, Kege Analog Tach, Dual Headlight Mod, N.A. Rear Fender Delete, OEM Short Windshield.
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03-14-2015, 01:31 AM	#4
Firehawk989 Join Date: Mar 2013 Location: Vancouver, BC Posts: 198	Ah yea that would do it. Your carb is probably different than mine, so I guess it makes sense that the jet size would be different too. __________________ 2005 Yamaha BWS (Zuma) "Garfield" TP Black Trophy 70cc, Giannelli Reverse Pipe, 5g Dr. Pulley Sliders, Delta Clutch with Yellow Springs and Yellow Contra, Malossi Torque Controller, Naraku R-Vent Bell, NCY Adjustable Secondary Sliding Sheave, CF Reeds, Kege Analog Tach, Dual Headlight Mod, N.A. Rear Fender Delete, OEM Short Windshield.
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