Modded Bike - Jetting Help
Posted: 03:55 pm Sep 23 2019
Hi,
Need some help because experimenting has left me confused.
2002 KDX 220
RB Carb
RB Head
Cut open airbox top
Elevation: 100-180m or so 300-500ft
Boyesen Reeds
Pro Circuit Plat 2 Pipe
Stock silencer
Current settings: (as they came from RB Designs)
Main Jet 150
Pilot 40
Float Height 17
A/F: 7/8 turns out
My bike always ran great. It started real easy, warmed up easy, and then rode great.
I then wanted to play with the a/f mixture a bit to see if I was missing on something without even knowing it. First step was to measure where I'm at, messed that up, screwdriver slid off on me. Fine I will just set it again. Start at 1.5 and go out towards 2.5. Settled on 2 turns out. Blips were nice. However during riding it felt off, weak. So I played around and set it to 3, 2.75, 2.5, 2.25 all the way down to 1.5 always the same.
I went to look for Ron's instructions and where he filled out the a/f setting it seems to say 7/8 turns out. I never thought of going below 1.5. So I set it and my bike is running excellent again.
Now I am confused, I thought if the a/f is less than one turn you have to change pilot. Please advise?
Picture of settings notes from Ron. A/F hard to make out.
https://imgur.com/a/6DVukEU
Need some help because experimenting has left me confused.
2002 KDX 220
RB Carb
RB Head
Cut open airbox top
Elevation: 100-180m or so 300-500ft
Boyesen Reeds
Pro Circuit Plat 2 Pipe
Stock silencer
Current settings: (as they came from RB Designs)
Main Jet 150
Pilot 40
Float Height 17
A/F: 7/8 turns out
My bike always ran great. It started real easy, warmed up easy, and then rode great.
I then wanted to play with the a/f mixture a bit to see if I was missing on something without even knowing it. First step was to measure where I'm at, messed that up, screwdriver slid off on me. Fine I will just set it again. Start at 1.5 and go out towards 2.5. Settled on 2 turns out. Blips were nice. However during riding it felt off, weak. So I played around and set it to 3, 2.75, 2.5, 2.25 all the way down to 1.5 always the same.
I went to look for Ron's instructions and where he filled out the a/f setting it seems to say 7/8 turns out. I never thought of going below 1.5. So I set it and my bike is running excellent again.
Now I am confused, I thought if the a/f is less than one turn you have to change pilot. Please advise?
Picture of settings notes from Ron. A/F hard to make out.
https://imgur.com/a/6DVukEU