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View Full Version : Jetting on Yoshi Pipe



Shuee_400
05-05-2004, 09:22 AM
I just like to know what people jetting people are running with the Yoshi pipe.. Thanks

shaff107
05-06-2004, 10:10 PM
He also has a K&N air filter. What is everyone one running in theirs??

shaff107
05-06-2004, 10:18 PM
LTZ400 Full System Exhaust:

2175157, 2175500

Jetting for Stock Airbox with no modifications:
Mikuni main jet #122.5

Jetting with airbox snorkel cover removed:
Mikuni main jet #145.0

Jetting with airbox lid & snorkel cover removed:
Mikuni main jet #150.0


http://www.yoshimura-rd.com/corrections.asp

TRFOXX
05-07-2004, 08:35 AM
I just have the Yoshi slip on and i use the stock main jet with no airbox mods and the spark plug looks great!

BlueZ440
05-08-2004, 09:30 AM
150..remove air lid and snorkel.

nemesis
05-25-2004, 06:59 AM
Do you have to change anything other than the main jet?

Crazy Diamond
05-25-2006, 04:26 PM
What are the stock size jets?

GooseZ400
05-26-2006, 05:10 PM
Yosh slip on stock jetting, uni air filter, no air box mods and it still eats ex's for breakfast.
Go with what Yosh says they have they dyno sheets there to. Plug looks great and it hauls

GooseZ400
05-26-2006, 05:12 PM
2003-2004 main was a 125. Yoshi calss for a 125.
2005 and up is a 130 not much bigger but you know you'll be on the safe side

Crazy Diamond
05-26-2006, 05:25 PM
Goose--I just installed a Yoshi RS-3 Full Exhaust on my 2003. Yoshi calls for a 122.5 Main with no mods to airbox. I just took it for a ride and checked the plug and its white. If I have a 125 in there now what should I go to? A 122.5 like they call for will be leaner and the 125 is lean now. Also what about needle position?

GooseZ400
05-27-2006, 07:59 AM
if you had a 125 in it that should have done in.
try a 130 and a 135. stock needle if i remember right only has one position.
If it is lean i'd try the 130 next rev and hold er to max and chk the plug then

Crazy Diamond
05-28-2006, 08:45 PM
OK! I have a 135 in it now! Seems good. Plugs good. Now I'm hitting the Rev Quick. Which Rev Limiter should I go with? I'm also cutting the box and trying a 140 and 145 after that but need input on a Rev Box!