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brettzzzzz · 08-26-2007, 08:48 AM

I have a 99 zx7r, It runs fine without my ram air installed. If I install the ram air tubes the zx7r starves for fuel and leans out fast. It will die if I rev too high.

I blew out the jets with 100psi air from my air compressor. I have a slipon yosh pipe. I dont know why its leaning out.

mscuddy · 08-26-2007, 11:26 AM

Beacuse you didn't PUT A FREEKING JET KIT IN...that consists of BIGGER JETS...to compensate for the increased AIR FLOW...after you put that dang Yoshi pipe on it...

DO that, (put a bigger jet kit in) and the problem should be solved. That, or put the stock pipe back on, see if it runs ok..and if it does, you'll know why.

seruzawa · 08-26-2007, 02:11 PM

Quote:

Originally Posted by mscuddy

Beacuse you didn't PUT A FREEKING JET KIT IN...that consists of BIGGER JETS...to compensate for the increased AIR FLOW...after you put that dang Yoshi pipe on it...

DO that, (put a bigger jet kit in) and the problem should be solved. That, or put the stock pipe back on, see if it runs ok..and if it does, you'll know why.

....ya just gotta take a breath. Hard to believe it but most people have no clue when it comes to exhaust/intake mods.... witness the high rate of loud bikes (cruisers and sportbikes) making like .38 Specials.

Kenneth_Moore · 08-27-2007, 11:44 AM

Quote:

Originally Posted by seruzawa

....ya just gotta take a breath. Hard to believe it but most people have no clue when it comes to exhaust/intake mods.... witness the high rate of loud bikes (cruisers and sportbikes) making like .38 Specials.

Breath in, breath out...

cgifly2 · 01-09-2008, 08:48 PM

No you dont need bigger jets. The problem is the carb bowl vents need to be pressurized with the same pressure as the intake side of the carb. Your bowl vent tube iether fell off or is plugged. Did you take off the air diverter valve? If you did you need to redirect the bowl vent to the aircleaner.

pplassm · 01-10-2008, 07:30 AM

Quote:

Originally Posted by cgifly2

No you dont need bigger jets. The problem is the carb bowl vents need to be pressurized with the same pressure as the intake side of the carb. Your bowl vent tube iether fell off or is plugged. Did you take off the air diverter valve? If you did you need to redirect the bowl vent to the aircleaner.

Exactly. John Burns had this exact problem in his recent article in Cycle World.

seruzawa · 01-10-2008, 07:53 AM

Quote:

Originally Posted by pplassm

Exactly. John Burns had this exact problem in his recent article in Cycle World.

But with the mods he probably will need a jet kit anyhow. Bikes run pretty lean stock. He should at least do some runs to check the plug color.

longride · 01-10-2008, 08:01 AM

None of us here really read Cycle World. We are all pretty much past that rag, so we certainly wouldn't know what old JB said.

mscuddy · 01-10-2008, 08:28 AM

?!?! Pressurize the float bowls? Wouldn't that cause the gasoline to shoot back into the gas tank and cause a horrible accident akin to the Hindenburg disaster? Oh the humanity...

Funny, but the ram air IV system on my '68 GTO (pirated from a '69) didn't have a pressurized float bowl..guess the Quadrajunk didn't need one...

seruzawa · 01-10-2008, 08:42 AM

Quote:

Originally Posted by mscuddy

?!?! Pressurize the float bowls? Wouldn't that cause the gasoline to shoot back into the gas tank and cause a horrible accident akin to the Hindenburg disaster? Oh the humanity...

Funny, but the ram air IV system on my '68 GTO (pirated from a '69) didn't have a pressurized float bowl..guess the Quadrajunk didn't need one...

Didn't they still use side valves and surface vapor carburetion in 1968?

08-26-2007, 08:48 AM	#1
brettzzzzz Registered Member Join Date: Aug 2007 Location: LA< california Posts: 1	zx7r ninja leans out with ram air installed I have a 99 zx7r, It runs fine without my ram air installed. If I install the ram air tubes the zx7r starves for fuel and leans out fast. It will die if I rev too high. I blew out the jets with 100psi air from my air compressor. I have a slipon yosh pipe. I dont know why its leaning out.

08-26-2007, 11:26 AM	#2
mscuddy MODERATOR X Join Date: Jun 2007 Location: Next to my still checkin the temp. Posts: 5,444	Big Jets Needed Beacuse you didn't PUT A FREEKING JET KIT IN...that consists of BIGGER JETS...to compensate for the increased AIR FLOW...after you put that dang Yoshi pipe on it... DO that, (put a bigger jet kit in) and the problem should be solved. That, or put the stock pipe back on, see if it runs ok..and if it does, you'll know why. __________________ A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that.

01-10-2008, 08:01 AM	#8
longride Super Duper Mod Man Join Date: Nov 2001 Location: Anywhere they let me Posts: 10,484	None of us here really read Cycle World. We are all pretty much past that rag, so we certainly wouldn't know what old JB said. __________________ I'm a knucklehead

01-10-2008, 08:28 AM	#9
mscuddy MODERATOR X Join Date: Jun 2007 Location: Next to my still checkin the temp. Posts: 5,444	?!?! Pressurize the float bowls? Wouldn't that cause the gasoline to shoot back into the gas tank and cause a horrible accident akin to the Hindenburg disaster? Oh the humanity... Funny, but the ram air IV system on my '68 GTO (pirated from a '69) didn't have a pressurized float bowl..guess the Quadrajunk didn't need one... __________________ A gun is a tool, Marian; no better or no worse than any other tool: an axe, a shovel or anything. A gun is as good or as bad as the man using it. Remember that.

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01-09-2008, 08:48 PM	#5
cgifly2 Registered Member Join Date: Jan 2008 Posts: 2	No you dont need bigger jets. The problem is the carb bowl vents need to be pressurized with the same pressure as the intake side of the carb. Your bowl vent tube iether fell off or is plugged. Did you take off the air diverter valve? If you did you need to redirect the bowl vent to the aircleaner.