Page 1 of 1
Lumpy tickover
Posted:
Sun Mar 29, 2020 9:14 amby Stand63
Hi folks
Running a new build Scootopia 186 with a 28phbh with a tea strainer filter and AF clubman. Runs fine, starts fine and plug colour fine. I’ve adjusted the mix screw in and out and settled on the best spot for pick up and returning to tickover but it still remains very lumpy. It’s fine at start up with the choke on. Any ideas most appreciated
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 10:02 amby MickYork
An auto advance/retard is an option, cleans up the lower rev's.
What's your timing set at and full carb' spec ?
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 11:04 amby Stand63
Will have a look. Timing is 17. Main is 122 but will check pilot.
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 1:22 pmby Stand63
Pilot jet is size 70
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 1:38 pmby MickYork
I've not had a Scootopia 186 but 70 seems overly large for a pilot, are you sure that's not your choke jet ?
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 2:04 pmby Stand63
Sorry Mick. Pilot is 55 and choke is 70
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 2:08 pmby MickYork
Seems about right. Have you tried without the filter ?
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 2:24 pmby Stand63
Yes mate, no difference.
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 2:40 pmby MickYork
The port timings on some barrels can sometimes be a factor and you may always struggle, the auto retard is a good option for little cost and fairly easy to set up.
Re: Lumpy tickover
Posted:
Sun Mar 29, 2020 3:48 pmby Stand63
Thanks Mick. I’ll have a look