LCGB Forums

As far as I can find out pilot jets are numbered in increments of 5.
I have a 20 that is a little rich is there fine tuning by a screw rather than jumping down to a 15.

Thanks in advance.

What size Amal is it? and on what motor as the pilot seems very small

Ts1 200
34mm
As supplied by AF
Got about 7k on it so far just changed end can and it's richend up the bottom end.

my old settings for that would be around:

pilot Jet: 25-30
main jet: 300-320
Atomiser: 107
Needle: 2D1
Slide 3.5
Will also require a shallow float to prevent fuel starvation

What pipe did you run.
Mines a micron revs to about 7.5-8k.
No issues of fuel starve.

Ran many pipes around those settings, Fresco's, Mickecks,Taffspeeds, PM Tuning and Microns, none went smaller than a 25 Pilot AF's used to advise winding the air/mixture screw all the way in(rich), but we found this was not always the case for best low throttle position/pick up etc

I recently set an Amal up on a TS 225 and it dynoed up fine with this old formula

Bit of a dilemma.
Bike has run safe for years, except for dropping the skirt off the old asso pistons woosner now fitted.
Do I ignore your wisdom and trust what I have and turn th3 airscrew out.
If I were to drastically change the jetting I would probably go for 30mm phbh as I have loads of jets and an understanding of them.

Update

Air screw was 3/4 out gone to 1 1/2.
Tick over picked up so in right direction.
Plug chops now.