Tuning to Reality with the Air Fuel Meter involved – Part 2
After reading all that I could find on the subject and talking with some of our major players in the motorcycle upgrade and fuel tuning field...
Initially I was very excited about my new found power and performance on my 12 Cross bike after the initial install but the gas mileage was dismal and the performance had holes in it and I could feel but not see. Tuning without regard to understanding air fuel ratios is like shooting at a moving target with your eyes closed. Sometimes you hit and sometimes you don’t. Dobeck tries to make it simple but the black art of tuning is anything but easy even with only 3 buttons to push in the 6 different modes available to use. Green for cruise, yellow for acceleration and red for full throttle.
The two other transition Y/B & R/B modes are for transitioning from cruise to acceleration and from acceleration to full throttle.
Fast forward to 10 days later of being buried in due diligence and test riding…
I had set my fuel tuner to the recommended settings to begin with but ended up so far away when adding the AF meter I would never recommend anyone to install a tuner without using one
- as you risk running fat in some areas and lean in others not really knowing where using only your butt meter and every motor is different.
*A startling difference in the Cruise mode where we spend most of our time on the throttle. Adding more gas than it needs thinking it is more power is wrong thinking.
Use and believe the Air Fuel meter for tuning, not your butt feel.
Initial Settings were 3.5G 2Y .5R .5GB .5YB 4RB = 27-33 MPG Free breathing, great idle and more power.
Final settings with Air Fuel meter used: 12.5 AF accelerating and 14.2 -15.0 Fwy cruise
.5G 1Y .5R .5GB .5YB 3RB = 39 - 44 MPG
Good power, easier breathing and steady idle with decent gas mileage.
This graph easily depicts the understanding of AF compromise.
Installing the Fuel/Air ratio meter was very simple to install and easy to use. Do it yourself with a tuner, air filter and pipes make this a very cost efficient upgrade with measurable results. Simply unscrewing the stock oxygen sensor and replacing with the Dobeck wired unit and attaching to a power port is all that is needed. I brought up my fuel controller to the gas tank to see when I transitioned to the different modes while under power.
Dobeck makes a performance upgrade done at home in your garage easy starting with an accessible low cost fuel tuner and adding the other modification parts from our favorite vendors to accomplish a better running Victory !
If you missed it - Part 1