JET THE HELL OUTA HERE

Dialling in a carb on a modified engine is shit. A deeper level of understanding of the functions of each carb part would help, but I think a bit of knowledge and a lot of trial and error will provide eventual results.
I have started to document different setups, emailing the list to myself and updating with each trial.
The current setup is - px200 malossi 210 kit, 185 inlet timing, ignition 18degrees Before top Dead Centre, sito plus exhaust, si24/24e dellorto carb, 450 km's into break in.

The factors are
- idle jet - marked with 2 numbers. The second number divided by the first gives a number. The smaller that number, the richer the idle mix. This, along with the air mixture screw, affects running up to half throttle, and a little bit higher in the throttle range.

- idle air mixture screw - Depending who you ask, should be between half a turn out and three turns out. This should essentially be a way of fine tuning the idle jet. Turning in makes leaner, out makes richer.

- MAIN JET STACK- consists of three things joined together. Supposedly effects a quarter throttle( a bit) through to full throttle.
- air corrector - (stock 160) measures amount of air allowed into the mix. Number represents hole size, so bigger number = more air = leaner mix

- mixer tube, aka jet holder or mixer.- still unsure about this one. I know it comes in a BE3(stock) and BE4. The holes are smaller and in less amount on the BE4, and my current take is that it is a richer thing in the end. research has shown people have used smaller main jets when using the BE4. There is more to it than that and I intend finding out.

- Main jet - simply the bit on the end of the stack that has a hole in it. The marked number is the hole size in metric (a stock 116 main jet has a hole of 1.16mm)

I will copy and paste my experiments and the results here.....

128 - be3 - 140 air - 55/160 - 2 turns out temp-200-220 around town 320 flat stick * top speed 103

125 - be4 - 140 air - 55/160 - 1.5 turns out temp- 25 around town - 340 flat stick

125 - be3 - 140 air - 55/160 - 1 turns out - loves it great accelleration - temp 280 around town to scary to open out (at least 350)

130 - be4 - 140 air -48/160 - 1.5 turns out (lean off the low rev circuit, and keep the mid kinda lean, but richen the top) too lean at full revs 220-250 temps around burbs

YET to try

128 - be4 - 140 air -48/160 - 1.5 turns out (lean off the low rev circuit, and richen the mid range and top)

125 - be4 - 160 air -48/160 - 1.5 turns out (lean off the low rev circuit, and richen the mid range and top)

128 - be3 - 120 air - 55/160 - 1.5 turns out (restrict air at the top end to richen the midrange and top)

current - 130 - be3 - 160 air - 48/160 - 1 turns out -seems to be unable to get lean symptoms at idle and low revs. Perhaps is too lean and I can't tell. Fanging up and down easey street in 2nd and 3rd got the temp to 240 . Seems to have a good power band after half throttle . Low throttle is a bit boggy/ hesitant

below is a page from the SIP scooter sit ein Germany: