wouldn't it be easier and cheaper to change the front sprocket to 13t?

 

+1 on 13t sprocket....i can swap my 14t to a 13t & vice versa without changing chain length. One tooth off the front is equivalent of adding three teeth on the back. easy

 

Yeah, but I did that but with that set up, I find it lacks the ommmmph on the trails. I went back to 14t and got the 49t rear and 110 length chain.it's perfect on the trails. 1st is great on very steep technical trails, 2nd is great and 3rd is better. But that might be just me. Depends on trils you ride.
After a few weeks I rejet and q4 pipe, now its even more better .
With my current set up, it think it's equivalent to like 12t front with the stock rear.

 

There could be a cheaper way to do this without buying a controller. If you buy a 02 sensor eliminator & unplug your 02 lambda & replace with a 02 sensor eliminator module, your ecu will be tricked into delivering it's max richness all the time (not much more) but enough for a air lid off etc.

I think Jeffward made one out of two resisters if your look at his threads he shows how to or just buy one!

 

Hi Joel,

Very interested in this, Do you have any more info about it?

Im in Thailand too, BKK.

Cheers

 

Yeah, there is. Marcelino´s cam shaft mod is free and really wakes the bike up. I´ve done the mod on my bike (EFI) and I am very happy with the results.

 

Where you buy these individually I don't know!

This came with the TBR Juice box & the same 02 sensor eliminator comes with the Power commander v.

There was never any magical performance boost when I fitted this but the deceleration exhaust popping was very much reduced, so i'm guessing the AFR mixture was enriched a tad. My APi ecu requires my 02 lambda sensor is plugged in so I no longer use the eliminator.




The clean air system (pair valve), gives your Lambda sensor a false reading as it's artificially releasing air into the exhaust to burn off excess fuel in the exhaust more efficiently, for the strict emission regulations Euro3 laws. The 02 eliminator counter acts this & them some.

The arrow points to the air tube from the airbox that supplies the pair valve, if you have an APi or a PCv the pair valve must be blocked or fully removed!

Edit: Only needs blocking if your running an AutoTune unit with your PCv......If no AT unit, the 02 eliminator is all you need to use!

 

fwiw the Huskys default to a rich 'competition" map by design when the o2 sensor is unplugged. The downside is it's a rich open baffle race pipe setting, which kills fuel range if that's important? The natural progression is guys still end up buying tuners to make em run right,

 

Yes, I'm very interested in this mod also, but can not do it yet without voiding the warranty of the bike. :P

JoelThailand, I see you have a very nice and interesting PDF file. Mind sharing it?

 

Sure, this is the 2010 Efi manual for the S & SF Asian/Euro model: https://dl.dropbox.com/u/7994391/klx250.pdf