I have found a good site with excellent links to tech pages on setting up
and tuning Weber carbs
Try http://www.geocities.com/Baja/Canyon/1017/weber.html
The page on tuning DCOE's is esp good as it explains all about choke size,
venturi size, jets, emulsion tubes etc. If your carbs are not set up for
your engine size / cams etc, you will never get it to run just by twiddling
screws.
http://www.geocities.com/Baja/Canyon/1017/webertune.html
Very important to have good functioning needle valves and set loat levels
correctly for starters.
Overhaul kits for webers are not expensive and worth investing in if your
carbs have been around for a while or have been bought second hand..
An excellent book is " How to build and power tune Weber and Dellorto carbs"
by Des Hammill ( SpeedPro Series ) Veloce Publishing PLC.
I got one in NZ for $79.00 - excellent value.
I needed help to get my Datto 1600 with twin 45 DCOE's when I bought it.
Several previous owners had played around with and stuffed up the carbs
hopelessly. Helped a lot.
Hope this helps.
Richard.
- Original Message -----
From: "Pooley, Trevor" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, 10 April 2001 13:46
Subject: RE: Weber Tuning - help!
> Davo,
>
> For the front weber. Check that the pump jets have washers on the bottom
of
> them and that the rubber o ring on the screw in hat is in serviceable
> condition. If the pump jet is not firmly seated then you can get fuel
> dripping around them which causes the carb to flood. If you pull the carb
> off you can open the butterfly and feel if the pump jet is loose or not.
>
> If this is OK then look at the float levels.
>
> Word of warning. Don't over tighten the idle screws or you will break the
> casting around the idles on the insides of the castings after the
butterfly.
>
>
> Cheers
> Trev
>
>
> -----Original Message-----
> From: Davidson [mailto:[EMAIL PROTECTED]]
> Sent: 9 April 2001 18:07
> To: [EMAIL PROTECTED]
> Subject: Weber Tuning - help!
>
>
> Heyaz,
>
> Just trying to get the carbs tuned on my 1200 and i have no idea what im
> doing. Heres whats happeneing. Anything under 4000rpm it just has no
> power
> and spits and backfires out the carbys every now and then. Above 4
> grand
> power comes on fairly strong. It wont idle. And i also noticed after i
> had
> taken it for a spin that the front weber leaks. Fuel was just dripping
> out
> of the throats which i dont think is a good sign. Its is driveable at
> the
> moment but i want it running a bit better for this Sunday for the Datto
> cruise. Any tips on what to do just to get it to idle would be great!!
> cheers
>
> Scott
> Davo
>
>
>
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