good and bad example of si carb IDLE JET setting: another carb healthy SOUNDcheck:

polini 186 setups:
1) si25, BIGbox sport: 1,8 idle, 148 main jet
2) si24, sip road v2 box: idle 2,9, main 128

the result:
1) rev immediatly comes down2 normal rev after heavy engine load / full throttle
2) gets stuck at high rev, needs long to come down to normal idle rev.

the result:
1) get out of the city and just hit it hard with no mercy ;)
2) in the city: just stay in the 2nd gear with high rev/speed but only small slide opening = idle jet area, where it is most important
then see how fast it comes down to normal idle

ir needs to come down immediatly
everything else is too lean
sure, its rideable, u get from a to b, BUT its not 100% sustainable well set. engine will definitely die in extremer Situations as city cruising = hill curving outside the city, up and down + slide open, closed, little opened. thats where it hits in if it in fact well set or not ;)

most of the home tuned, diy tuned vespas are wromgly set. u can here that clearlly.

#SIcarb #carbsetting #dellorto #idlejet #mainjet