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Old November 26th, 2015, 07:11 AM   #6
DaBlue1
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Name: Blue
Location: Charlotte, NC
Join Date: Sep 2010

Motorcycle(s): 2009 Kawasaki Ninja 250R

Posts: A lot.
Quote:
Originally Posted by MauR View Post
.....I am going to replace the plugs

My Questions:

1. Should I use CR9E or CR8E??
2. Are plugs so dark due to the number or am I running rich??
3. Is the idle problem spark plug related or should I look for something else??
4. Gaps is .033, is this OK?
Another thing to take in consideration is your altitude and the condition of your air filter.

Looking at your location (Mexico City Mexico?), your elevation is going to be over 7,000 ft ASL. For a bike with stock carb adjustments/jetting, you will see rich looking plugs and the bike will run rich. Add in a dirty filter and you will get an ill running bike @ idle speed. Also avg temps can be a factor.

Look at the basic things first. Better burning plugs (Iridium CR8EIX) and a better breathing air filter (most aftermarket filters). Removal of the snorkel may work also.

If that does bring up your performance any, then rejetting to a smaller than stock #98 main jet, is in order.
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