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Engine rebuild part 2. Can't get idle set

Technical help for Series one, two and three Lambrettas. Models include the Li, Li Special, TV, SX, GP, Serveta and API/SIL models

Engine rebuild part 2. Can't get idle set

Postby Stevepshipley » Mon Aug 21, 2017 3:08 pm

Just put my newly rebuilt engine in a scooter and all looks and sound good.
It's an early jet200 engine with a new SIL200 top end with a AF clubman.
Carb is delorto 26mm jetted as follows without any filter
52 pilot
108 main
Av266
X7 3rd clip
Air screw 1.5 turns
I can't get it to idle, it just dies. Reading all the guidance I'm supposed to get the bottom part of the carb settings right before worrying about plug chops and the rest of the range.
So my questions are please, is the jetting somewhere near ballpark. And do I need to buy some smaller pilot jets to get the idle sorted.
Thanks in advance Steve
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Re: Engine rebuild part 2. Can't get idle set

Postby a-teamlambretta » Mon Aug 21, 2017 6:33 pm

engine could be a bit tight due to re build , could go up on pilot to a 60 .
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Re: Engine rebuild part 2. Can't get idle set

Postby Rich Oswald » Mon Aug 21, 2017 6:51 pm

a-teamlambretta wrote:engine could be a bit tight due to re build , could go up on pilot to a 60 .


Need to try a 50 pilot not go up to 60????
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Re: Engine rebuild part 2. Can't get idle set

Postby MickYork » Mon Aug 21, 2017 7:05 pm

Rich Oswald wrote:
a-teamlambretta wrote:engine could be a bit tight due to re build , could go up on pilot to a 60 .


Need to try a 50 pilot not go up to 60????


+1

Is choke closing fully ?
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Re: Engine rebuild part 2. Can't get idle set

Postby grandpa » Tue Aug 22, 2017 11:06 am

Hi MickYork
Have a look at this:
viewtopic.php?f=6&t=8117
My Jet 200 has a SIL top end with 26mm Delly and AF clubman
Needle X7 2nd pos
Pilot 50
Emulsion tube V266
Choke 70
Main jet 110
Slide 40
Breathes through standard filter and ticks over fine
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Re: Engine rebuild part 2. Can't get idle set

Postby Stevepshipley » Tue Aug 22, 2017 5:26 pm

Thanks so far chaps, I've ordered some some pilot jets to try. It starts ok on choke, idling I need to sort out first. I'll let you know how I get on. Cheers steve
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Re: Engine rebuild part 2. Can't get idle set

Postby Stevepshipley » Thu Aug 24, 2017 3:14 pm

Nearly there with a 45 pilot. Cheers
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