Go Back   Motorcycle Forum > Motorcycle.Com General Discussion > Motorcycle Mods and Maintenance

Reply
 
Thread Tools
Old 08-26-2007, 08:48 AM   #1
brettzzzzz
Registered Member
 
Join Date: Aug 2007
Location: LA< california
Posts: 1
Cool 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.
brettzzzzz is offline   Reply With Quote

Sponsored Links Remove Advertisements
Motorcycle Forum
Advertisement
Old 08-26-2007, 11:26 AM   #2
mscuddy
MODERATOR X

 
mscuddy's Avatar
 
Join Date: Jun 2007
Location: Next to my still checkin the temp.
Posts: 5,449
Default 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.
mscuddy is offline   Reply With Quote
Old 08-26-2007, 02:11 PM   #3
seruzawa
The Toad

 
seruzawa's Avatar
 
Join Date: Nov 2001
Location: 8501 ft.
Posts: 17,461
Default Sometines....

Quote:
Originally Posted by mscuddy View Post
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.
__________________
"Make no mistake, Communism lost a big argument - one we know today as the 20th century."

Last edited by seruzawa; 08-26-2007 at 03:45 PM.. Reason: spelling... do'h!
seruzawa is offline   Reply With Quote
Old 08-27-2007, 11:44 AM   #4
Kenneth_Moore
Registered Member
 
Kenneth_Moore's Avatar
 
Join Date: Jun 2007
Location: VIsiting the GIft Shop in the Pit of DIspair
Posts: 7,118
Default

Quote:
Originally Posted by seruzawa View Post
....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...
__________________
www.kennethmoore.org
Kenneth_Moore is offline   Reply With Quote
Old 01-09-2008, 08:48 PM   #5
cgifly2
Registered Member
 
Join Date: Jan 2008
Posts: 2
Default

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.
cgifly2 is offline   Reply With Quote
Old 01-10-2008, 07:30 AM   #6
pplassm
Founding Member
 
pplassm's Avatar
 
Join Date: Nov 2001
Posts: 3,875
Default

Quote:
Originally Posted by cgifly2 View Post
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.
__________________
Mongo just pawn in game of life.
pplassm is offline   Reply With Quote
Old 01-10-2008, 07:53 AM   #7
seruzawa
The Toad

 
seruzawa's Avatar
 
Join Date: Nov 2001
Location: 8501 ft.
Posts: 17,461
Default Good catch.

Quote:
Originally Posted by pplassm View Post
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.
__________________
"Make no mistake, Communism lost a big argument - one we know today as the 20th century."
seruzawa is offline   Reply With Quote
Old 01-10-2008, 08:01 AM   #8
longride
Super Duper Mod Man

 
longride's Avatar
 
Join Date: Nov 2001
Location: Anywhere they let me
Posts: 10,479
Default

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
longride is offline   Reply With Quote
Old 01-10-2008, 08:28 AM   #9
mscuddy
MODERATOR X

 
mscuddy's Avatar
 
Join Date: Jun 2007
Location: Next to my still checkin the temp.
Posts: 5,449
Default

?!?! 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.
mscuddy is offline   Reply With Quote
Old 01-10-2008, 08:42 AM   #10
seruzawa
The Toad

 
seruzawa's Avatar
 
Join Date: Nov 2001
Location: 8501 ft.
Posts: 17,461
Default

Quote:
Originally Posted by mscuddy View Post
?!?! 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?
__________________
"Make no mistake, Communism lost a big argument - one we know today as the 20th century."
seruzawa is offline   Reply With Quote
Reply


Thread Tools

Posting Rules

Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off