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How to lean out fueling?

darren.engineer2010-06-25 21:36:17 +0000 #1
I have a kawasaki 650r and I think it's running rich. I only get ~200km on a full tank which seems pretty bad. I've read a few forums which state factory settings on this bike are on the rich side and leaning things out help with power/efficiency/fuel eco, etc.

How does one go about this aside from buying a power commander?
CHIA2010-06-25 21:41:43 +0000 #2
I think a PC is really the only way to easily mess with ECU settings, that control A/F ratio.

Just a guess, but I expect this will make pretty minor, if any differences, and your riding habits will play a much larger role.

Typically, a PC is used for performance gains, not mileage gains.
darren.engineer2010-06-25 21:46:14 +0000 #3
Well one way to do it is to remove the inlet snorkels in the air box. I'm just wondering if there are any other tricks of the trade?
Coastmaster2010-06-25 22:50:47 +0000 #4

Originally Posted by

Well one way to do it is to remove the inlet snorkels in the air box.

Sounds like a plan. Let us know how that works out for you.
Danke2010-06-25 23:17:47 +0000 #5
What do the Kawi forums say about slapping a can on? That leans out most bikes. Not the most scientific way to go though.
Cuff2010-06-25 21:53:50 +0000 #6
I would start with cleaning your air filter and checking plugs before anything.
CHIA2010-06-25 23:42:58 +0000 #7
What are other equivalent bikes getting for mileage?

I thought the same thing when I used to have an SV650...even went to Holeshot and put it on the analyzer, as I was sure I was running rich.

Came back perfect.....I decided to make a conscience effort, for about 1 tank, to measure mileage, and be easy on the throttle....guess what....considerable difference.

This is sometimes an early season phenomena, where the throttle hand is slightly excitable, after resting all winter



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