Anyone try one of these air/fuel ratio meters to aid in jetting. I have read several reviews of people who actually use and like them. It would be nice if their website actually contained some information on how it works.

http://www.jet4power.com

 

Here is some info on how it works: http://www.jet4power.com/info.html#Tuning%20Guidelines

Just an o2 sensor with LED readouts.

 

I got this one and totally love it.

http://www.speedshop.org/store/scrip...p?idProduct=15

jbt

 

The unit slowride costs half as much, and is more accurate - it would seem this is the better choice. How much did this change your jetting when you first installed it? Were you pretty close or did this bring you new found power?

I think the RED LEDs with the square unit would be the best package - the LCDs are going to be tough to read in the daylight. Although the blue backlight could be cool, imagine racing and you've got a cool little red glowing gauge for your copedetors to look at while your zooming up the hill.

 

I installed it after getting a MrHp Lectron and it was at .87 were we race (sea level). At the house, its a little fatter (.92 at 2,900ft) but the DS is still to fast on the trails, so I don't adjust it. I'll be at St. Anthony (4,900ft ft?) next week and I got to dial in my bike just for bragging rights around the campfire.

At 6,000ft it measured .97, but the DS was still pulling hard enough since we were riding in terain that was very techinical. If I was going to race, I would have made a carb adjustment.

Reading the gauge while in the middle of third or top of fifth is easiser if you mount it in a place you can quickly glance at "while at speed". Rough checking the jetting in the garage is hoops easier. The garage measurements are really close to "at speed" measurements, but I final tune my jetting to be at .87 after a good hard ride or after a several hill climbs.

jbt

 

Slowride, do you have any pics of your install? How did you mount the 02 sensor? TIA

 

pictures are updated. The firecracker shrink wrap on the o2 was done on purpose to draw a little attention to it. Most folks think I got a bottle hidden somewhere because of the sensor. Little do they know I do, but its a bud-lite.[img]i/expressions/face-icon-small-smile.gif[/img]

jbt

 

Thanks Slowride. I think I may get me one of these. [img]i/expressions/face-icon-small-smile.gif[/img] Great pictures of Dumont by the way.

 

Yesterday, our relative humidity was in the 60's, when it's normally in the teens. Our ambient tempature was still about 100. I took the bike out for a quick jaunt and noticed the gauge showing the bike was running real fat (.96).

I didn't think the humidity would have such a drastic impact on the air/fuel mixture.

jbt

 

That O2 sensor isn't small is it? So you just drill one hole plug it in maybe turn a bolt and that is it for the O2 sensor, right? That soulds rather nice to know how your engine is running... The idea is certainly appealing.