THEMOOSE...

Where are you getting your Dyno runs performed?

Jim

 

Thanks for all of your help. It is cool you can ask a question and get usefull advice. See you all at the dunes.

 

Jim, here is a link to Bradley Racing in Tulsa. They have a Dynojet ATV~Go-cart dyno. Last I heard it was 3 pulls for $50. Call ahead for an appiontment.

 

musthavetheblue
take it from a high altitude rider, if you are ranging from 5000'->9000' you will need to learn how to jet, i ride from 5000'->8000' tops
and I rejet depending on where i ride, once you get the hang of it you can do it in 20min (over an hour the 1st time though), with full exhaust no airbox lid k&n on pro-flow I use 144/146 dynojets if i am in the 7000' range and run 146/148 at the 5000' range, dynojet needle on the 4th postion and air/fuel at 2 3/4 email me if you need more info

 

Moose,

A couple of questions for you.

1. Righ Carb Left Carb? Is this sitting on the bike with left carb being gear shifter side and right carb being muffler side or is it the other way around?


2. The O2 Sensor on the Dyno, how did they attach it to the exhaust? Was it a typical O2 sensor or was it a special Dyno Sensor?

3. Does the air/fuel screws effect the entire RPM scale or does it only effect idle?

Below is my plan on adjusting mine I would like your/anybody's thoughts.

I am going to put a heated O2 sensor in the large section of pipe right before the muffler. I will then take rich/lean readings at Idle, 1000, 2000, 3000, 4000, 5000, 6000, 7000 in all 5 gears. I will use the matrix to determine proper jetting.

I have not Modified the Raptor in any way yet so before I start I am going to get all these readings from the stock rap as a baseline.

Sorry to bother you guys but I want to do as much and learn as much on this before I start. I do not want to start without knowing.

 

Bigblack, The 02 sensor probe was stuck in to the pipe & it was a heated sensor. The way the dyno guy measured mine was to run it through the gears to 4th @ about 2000 rpms, He then triggered the computer & ran it to 8000 rpms. Thats where he measured all the readings from.

Yes left/right as your sitting on the quad.

Air fuel is at idle & transition from idle to main jets as I understand it.

It's no bother!! It looks like you did a search on this subject before asking questions (you dug up this post from april!) that's the best way to find info!

 

TTT