Plug colour......

Anything related to Lambrettas... ask tech questions, post helpful info, or just read and learn.
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garry inglis
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looks right to me pics look better o and you need some new gloves :lol:
alanscottj
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garry inglis wrote:looks right to me pics look better o and you need some new gloves :lol:
Haha, can't afford new gloves! Spent it all on the engine :lol:
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Muppet
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looks good even colour down porcelain no signs of grey
Cโ€™est la vie
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coaster
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The 'accelerating up the hill' one loks too week but the other one looks about right.
alanscottj
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coaster wrote:The 'accelerating up the hill' one loks too week but the other one looks about right.
The second picture is the same 'accelerating up hill' just in a different light, it does look darker in real life. Not sure about it if it is too light as I don't really want to drop the clip again as I think it might be too rich. Having said that, it will be worth a try and see what it looks like then.
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Adam_Winstone
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1 and 2 still look lean to me. 3 and 4 have better colour but they certainly don't look rich.

Adam
alanscottj
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Adam_Winstone wrote:1 and 2 still look lean to me. 3 and 4 have better colour but they certainly don't look rich.

Adam
Ok, I dropped the clip one more to the bottom clip position. Very boggy, quarter to three quarter then cleared when main jet kicked in. Any thoughts then? Maybe I up the main jet to a 320 surely that will richen lower down too?
Lambretta Series 2 Rat - RB260, SuperTourer, Cyclone 5 gearbox ๐Ÿ˜Ž๐Ÿ‘
a.lo.v2
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surely 1/4 to 3/4 is the needle taper mostly? why initially to be safer did you raise the clip which lowers the needle and weakens the mix?
holty
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i would say as others have that pictures 1 and 2 look a little weak, you say they where uphill so i presume at full throttle, your needle will have no effect at that throttle position i would think, my suggestion would be an increase in main jet size, if it bogs at full throttle its too rich, i melted a piston on the way home from whitby this year, turned out i was way underjetted and yet my plug chop didnt look bad at all, probably my fault as we dont have any hills here to realy load up the engine. im sure you know a little rich makes less power but helps to keep your engine cool and safer from detonation, better than an engine rebuild. your 3 and four pics around your house i presume half to threequarter throttle will be using the needle and idle jet hence your lifting the needle has got a better colour than uphill.other thing to say is i presume you have no air leaks, eg inlet manifold or carb rubber base gasket,mag housing etc as this will make it run weak as well.
best regards,
holty
:D
alanscottj
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a.lo.v2 wrote:surely 1/4 to 3/4 is the needle taper mostly? why initially to be safer did you raise the clip which lowers the needle and weakens the mix?
Typo mate, I meant I had lowered it :oops:
Lambretta Series 2 Rat - RB260, SuperTourer, Cyclone 5 gearbox ๐Ÿ˜Ž๐Ÿ‘
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