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Ian M · Posted: Thu Sep 02, 2004 3:21 pm Post subject: Black plugs

Hi Guys
Just taken the spark plugs out of the old series 2 and they are sooty black.
Need to make her run a bit leaner....but how???
It has dellorto carbs which have 4 screws in each.
Does anyone know which ones to adjust and which way to turn??
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johnboy · Posted: Thu Sep 02, 2004 3:59 pm Post subject: Re: Black plugs

Does anyone know which ones to adjust and which way to turn??[/quote]

Hi Ian

from memory one is air one fuel,what you can do is winde them both in,then i think it is one and half turns out. fire her up then you can adjust by ear. half a turn at a time. hope this helps

all the best john
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Guest · Posted: Thu Sep 02, 2004 4:08 pm Post subject:

Thanks John Ill give it a try
Bit of trial & error I think

Guest · Posted: Thu Sep 02, 2004 4:17 pm Post subject: colortune

Suggest you use a colortune to avoid excessively lean running + detonation..

Eddie W · Posted: Fri Sep 03, 2004 11:32 am Post subject:

I'd almost bet on a float problem as they get heavier with age, with consequent enrichment. Needle valves can also be a culprit. Check your float adjustment (5-6 mm between float and top when held vertically). The idle adjustment is recessed inside a sort of tube towards the bottom of each barrel of the carb and 1.5 turns from seated is a starting point. It is a fuel screw so clockwise for lean and anticlockwise for rich. There are no other screw adjustments for mixture. Float levels will effect mixture throughout the rev range. Hope this helps.
Regards Eddie
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