Well I am getting ready to start fine tuning my 800 Rotax and have been reading up on tuning these gassers since I am used to working on diesel that you can run lean without worries.

This is what I have found so far for target AFR

Your target AFR should be around 14.7:1 in vacuum, around 12.5:1 at static, and around 11.5-11.0:1 as you approach your peak boost level. This will achieve the best fuel economy while supporting for lots of airflow

Does everyone agree with this? Thanks Adam

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2006 Camo Rhino, 2010 Rotax 800, muzzy duals, dobeck power commander, AEM AFR, STM Rage 6, Tuner Secondary, dual odyssey batteries, AFE under hood custom intake, Progressive 425 HD shocks, livnlo harness, ITP Beadlocks 26" Bighorn 2.0s, UTV Inc rear cage and seat.
http://s40.photobucket.com/albums/e2...Rotax%20Rhino/

Which tuner are you using?

I am using an AEM Uego AFR gauge with a EJK (Doebeck electronic jet kit)
They claim to be load based not alpha n tuning like dynojet.. I have heard good and bad about them. I am just getting into this one to see what all I can do with it.. They did say I could upgrade to the 3.5 versiona nd use the AEM 0-5 volt output to close loop around the AFR ratio.

EFI Controllers - Electronic Jet Kit - Motorcycles, ATVs, UTVs, Sportbikes, Snowmobiles, Watercraft, Dirt Bikes




Doebeck also makes a 4.0 with AFR gauge that is closed loop around AFR gauge all in one. They do not offer this yet for a can am.
GEN 4 - AFR PLUS EFI Controller - ATVs, UTVs, Motorcycles, Snowmobiles


I am being told a power commander 5 with dual auto tune is a better setup which it may be but the price is half of a tune monster...

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2006 Camo Rhino, 2010 Rotax 800, muzzy duals, dobeck power commander, AEM AFR, STM Rage 6, Tuner Secondary, dual odyssey batteries, AFE under hood custom intake, Progressive 425 HD shocks, livnlo harness, ITP Beadlocks 26" Bighorn 2.0s, UTV Inc rear cage and seat.
http://s40.photobucket.com/albums/e2...Rotax%20Rhino/

11:1 is too rich under boost. You would only go that rich if your running too much boost for your compression ratio and octane, and trying to use it as a bandaid. Some people like to say the extra fuel will keep the temps down, but it really doesn't. I personally would run 13.1-13.5:1 at WOT (no Boost), and at the most 12.5:1 under boost. Any more than that to keep it from pinging, and you really need to up your octane, or drop your compression. Just my 2cents..

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Ben Haines
SDRmotorsports.com
800.277.2280

2006 Yamaha SR1, SDR Motorsports Race Chassis & Long Travel

Wait I'm confused, red stroke are you turboed?

Not yet! Just seeing what options I have with current setup and then with a blowdryer on board...

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2006 Camo Rhino, 2010 Rotax 800, muzzy duals, dobeck power commander, AEM AFR, STM Rage 6, Tuner Secondary, dual odyssey batteries, AFE under hood custom intake, Progressive 425 HD shocks, livnlo harness, ITP Beadlocks 26" Bighorn 2.0s, UTV Inc rear cage and seat.
http://s40.photobucket.com/albums/e2...Rotax%20Rhino/