New build running awful!!! HELP

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alanscottj
registered user
Posts: 960
Joined: Fri May 23, 2014 6:54 pm
Main scooter: Lambretta GP SS250 Casa
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Afternoon troops. Just rebuilt my TS1 engine and put new BGM head on. Was running spot on before with old head but I had a dodgy cylinder stud thread so when I decided to repair that I took the opportunity to put the new CNC head on (squish set at 1.3), and leak down tested. Starts and ticks over ok but runs awful, no power at all, just manages to limp along. There is also lots of petrol spraying out of the carb (TMX open) when I twist the throttle. When I do try to ride her down the street she is really juddery.

Any thoughts guys?

Many thanks :D
Lambretta Series 2 Rat - RB260, SuperTourer, Cyclone 5 gearbox ๐Ÿ˜Ž๐Ÿ‘
alanscottj
registered user
Posts: 960
Joined: Fri May 23, 2014 6:54 pm
Main scooter: Lambretta GP SS250 Casa
Contact:

:lol: Cured
Lambretta Series 2 Rat - RB260, SuperTourer, Cyclone 5 gearbox ๐Ÿ˜Ž๐Ÿ‘
bristolmod
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Posts: 1741
Joined: Wed Jan 07, 2009 8:42 am
Main scooter: Lambretta TV175 S3- what else!
Location: Bali-Hai bar, Locarno Ballroom Bristol, 1967!- mines a Brown Split!!
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how?
Scootering since 1968.
alanscottj
registered user
Posts: 960
Joined: Fri May 23, 2014 6:54 pm
Main scooter: Lambretta GP SS250 Casa
Contact:

bristolmod wrote:how?
By putting the piston in the right way around :lol:
Lambretta Series 2 Rat - RB260, SuperTourer, Cyclone 5 gearbox ๐Ÿ˜Ž๐Ÿ‘
bristolmod
registered user
Posts: 1741
Joined: Wed Jan 07, 2009 8:42 am
Main scooter: Lambretta TV175 S3- what else!
Location: Bali-Hai bar, Locarno Ballroom Bristol, 1967!- mines a Brown Split!!
Contact:

alanscottj wrote:
bristolmod wrote:how?
By putting the piston in the right way around :lol:
been there seen it done it and got the T Shirt!!

best

Chris
Scootering since 1968.
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