MEASURING LEAN vs. RICH

[gert du prez]

Hi,

in the tech forum I read a lot about re-jetting and getting too lean/too rich, but what's the best way to measure this ?
I know that the theorethical best solution is 14.8 / 1, but how on earth can you know that on your bike ?

I would like to put a new 4-into-1 on my 1982 GS1100GL and get rid of the stock airbox...I would rather go for the separate K&N air filters...

any idea what to do ?

best regards,

gert

[Nessism]

any idea what to do ?

best regards,

gert

Simple answer, install a Dynojet stage 3 kit. The jets are sized for a header and pods. Done.

No easy to measure mixture directly. Your best bet is to "read" the plugs - check them for color. There is also something called "color tune" but I've never used one and can't offer any feedback.

[Guest]

Simple answer, install a Dynojet stage 3 kit. The jets are sized for a header and pods. Done.

No easy to measure mixture directly. Your best bet is to "read" the plugs - check them for color. There is also something called "color tune" but I've never used one and can't offer any feedback.

Good advice.
I also went went with a 4-1 and K&N pods with a Dynojet stage 3. The Dynojets suggested jetting on the needle is lean. I'd raise the needle one or two notches from their suggestion.(lowering the e-clip on the needle will raise the needle)

[rosco15]

Find someone locally with a dyno that has a air/fuel meter on it. They will let you know exactly where you are at.

[ehra]

I use an Innovate LM-1 wideband to tune my bikes. I weld in a bung in the exhaust and put the O2 sensor in, tune the carbs or injection and when I am done I put a plug in it and can use the meter on another project. I have used mine on my dragbike, street bike, Mustang and an injected 56 Bug I tune.
You can record a whole trip and see how it works in all throttle ranges.

http://www.innovatemotorsports.com/