Carb jetting?

Dave · 02-13-2009, 08:27 AM

do the jets themselves have numbers on them? my question was how faar up i should go and on what jets. and i think they are cv not sure

Dave · 02-13-2009, 09:14 AM

ok let me ask a ew more dumb questions i thought of later, im assuming a larger # means more fuel? and which jets need to go up? im assuming idle is fine and maybe the slow since it only hangs at 4k?

No Worries · 02-13-2009, 10:08 PM

At 4K, your bike is on the jet needle. And your carb is probably a CV (constant velocity), as my 79 Suzuki is one of the last years before CV carbs. The jet needle is pulled out of the main jet by differential air pressure. It's probably sticking. In other words, the carbs are dirty. Specifically, the diaphragm/piston and walls, and possibly one or more air bleeds.

Dnyce · 02-13-2009, 10:32 PM

bigger number, bigger hole

no worries has a gd point that i just assumed-did you try cleaning em already? thats usually the 1st thing to do with carbs before you start changing stuff.

Dave · 02-13-2009, 11:00 PM

ive cleaned them about 4 times and put extra attention towards making the needles move smoothly. found a recall notice today concerning needles actually. may have to see if i can find the replacement versions. might be my problem

02-13-2009, 08:27 AM	#1
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	do the jets themselves have numbers on them? my question was how faar up i should go and on what jets. and i think they are cv not sure __________________ TWF Post whore #6

02-13-2009, 09:14 AM	#2
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	ok let me ask a ew more dumb questions i thought of later, im assuming a larger # means more fuel? and which jets need to go up? im assuming idle is fine and maybe the slow since it only hangs at 4k? __________________ TWF Post whore #6

02-13-2009, 10:32 PM	#4
Dnyce flyin high Join Date: Mar 2008 Location: cali Moto: 10speed huffy w/cards in the spokes Posts: 2,318	bigger number, bigger hole no worries has a gd point that i just assumed-did you try cleaning em already? thats usually the 1st thing to do with carbs before you start changing stuff. __________________ "Racing Is Life, Everything Before and After is Just Waiting" Steve McQueen

02-13-2009, 11:00 PM	#5
Dave Chaotic Neutral Join Date: Feb 2008 Location: Cherry Hill NJ Moto: GV1200 Madura, Hawk gt Posts: 13,992	ive cleaned them about 4 times and put extra attention towards making the needles move smoothly. found a recall notice today concerning needles actually. may have to see if i can find the replacement versions. might be my problem __________________ TWF Post whore #6

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02-13-2009, 10:08 PM	#3
No Worries Keyboard Racer Join Date: Feb 2008 Location: Mile High City Moto: Old Superbikes Posts: 1,016	At 4K, your bike is on the jet needle. And your carb is probably a CV (constant velocity), as my 79 Suzuki is one of the last years before CV carbs. The jet needle is pulled out of the main jet by differential air pressure. It's probably sticking. In other words, the carbs are dirty. Specifically, the diaphragm/piston and walls, and possibly one or more air bleeds.