wanting to richen fuel injection - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 16 Old 06-07-2010, 02:22 PM Thread Starter
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wanting to richen fuel injection

i know the bikes come from the manufacturer lean for emission control purposes, and i heard/saw someone write that they had their bike richened up at the dealer. im not really wanting to spend the 300+ for a fuel commander and was wondering if anyone could recommend how much i should have the bike richened. i live in north east oklahoma and temps get into the 100's but i dont want to richen to much that it wont run right at higher alltitude when i go for a cross country ride. kinda looking for an overall just right kinda fuel mix that will do the job. any helpful info is greatly appreciated. thanks
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post #2 of 16 Old 06-07-2010, 05:29 PM
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I had my 650 done at the dealer and he used a Yoshimura tuning box. I had the low end richened a very small percent as that is where I was having a lean surge ie, 30mph in town at 3000-4000 rpm. It was very uncomfortable to be jerking back and forth while trying to ride quietly through town. I had to go back 4 times before we dialed in on the sweet spot though, we went too rich to start with and my mileage dropped 20 mpg. Now I have a nice smooth motor and it averages 45 mpg on my 20 mile trip to work and up to 52 mpg on a trip.

For what it's worth, mine is a 2006 model.
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post #3 of 16 Old 06-07-2010, 08:13 PM
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My local dealer claims it's illegal for them to use a Yosh box or any other means to fiddle with the factory settings, as they would void the emission crap.

<shrug>

Good luck with your 'richening' - wish I could get mine a little less lean.
 
post #4 of 16 Old 06-07-2010, 09:19 PM
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Quote:
Originally Posted by bryantjt View Post
I had my 650 done at the dealer and he used a Yoshimura tuning box. I had the low end richened a very small percent as that is where I was having a lean surge ie, 30mph in town at 3000-4000 rpm. It was very uncomfortable to be jerking back and forth while trying to ride quietly through town. I had to go back 4 times before we dialed in on the sweet spot though, we went too rich to start with and my mileage dropped 20 mpg. Now I have a nice smooth motor and it averages 45 mpg on my 20 mile trip to work and up to 52 mpg on a trip.

For what it's worth, mine is a 2006 model.
Did the same to mine. +5% on the low range solved the hiccup immediately.

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post #5 of 16 Old 06-08-2010, 08:51 AM
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My dealer offered the Yosh box service at $35., half hour labor, when I installed an aftermarket exhaust. Turned out I didn't need it, but you might check with the dealers near you.
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post #6 of 16 Old 06-08-2010, 08:55 AM
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There is also the do it yourself option

http://www.vstrom.info/Smf/index.php/board,14.0.html
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post #7 of 16 Old 06-08-2010, 12:53 PM
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Quote:
Originally Posted by steve68steve View Post
My local dealer claims it's illegal for them to use a Yosh box or any other means to fiddle with the factory settings, as they would void the emission crap.

<shrug>

Good luck with your 'richening' - wish I could get mine a little less lean.
This is the issue with many dealerships. They can apparently be fined for doing it so many just won't.

I installed the Ivan's TRE and it solved the problem. It now uses the enrichened 5th gear map in the lower four gears and I no longer have the hesitation caused by the lean condition with the stock map. Installation results in the loss of the O/D indicator light though because the bike think's it is in 5th all the time, or so I understand how it works. I believe it costed about $112. The price is on Ivan's web site.
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post #8 of 16 Old 06-08-2010, 03:05 PM
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Fascinating! Don't want to spend $300 to make your $10,000 bike run right?
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post #9 of 16 Old 06-08-2010, 09:27 PM
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Fascinating! Don't want to spend $300 to make your $10,000 bike run right?
Shouldn't have to.
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post #10 of 16 Old 06-08-2010, 11:02 PM
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Would a resistor work? Where would it go?
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