webber carb jetting

[vwtriker1948]

I have a 1600 twin port engine in the trike, it has a webber carb fitted that is a bit on the rich side. Plugs look like they come from a coal mine. Have no idea what the MPG is.

Does anyone know what jetting these carbs come with, i am looking for a starting point is all. It does have a stainless exhaust buy i have no idea what make.

A pretty open question i know.

[stinger608]

Is it one of the single carbs? One of the 2 barrel progressive or spread bore type? Give a model number so we can be sure to look up the correct factory jetting.

[vwtriker1948]

I think it might be a WEBER 40 IDF, to know for sure means taking the body off which i do not want to do right at this minute.
I am in the middle of making a new clutch cable and want to get that done first along with a spare.
All i seem to be doing putting a 101 little things right. I was told by another triker that all he did for a long time was put right loads of things cobbled together,i now know what he means.
I haven't got the years left i would like to do everything i would like, but i do want to ride it.

[ea81slush]

I understand your frustration but to save you taking the body on and off several times due to the "experimenting changing jets routine" I'd take it to a dyno tuner and take the body off there. Then tune it and if the dyno guy doesn't have many weber jets then order a pack from ebay or the like. I recently bought a pack of 4 jets per location eg mains, airs, idles and accelerator.

Getting the jets right is a one step procedure but guessing will cause you dramas.

Tony

[stinger608]

According to Weber, this is the factory jetting on a single 40 IDF:

WEBER 40 IDF	Factory Sizes	Single Carb	Dual Carbs
AIR CORRECTION	2.00	1.60	2.00
EMULSION TUBE	F-11
MAIN JET	1.15	1.45	1.30
PUMP JET	.50	.80	.50
IDLE JET	.50	.65	.55
VENTURII	28mm

Now, if your running an EMPI clone, Here is the catalog page that shows the jetting on the dual's and single 40 HPMX carbs:

http://vwcatalog.empius.com/vwcatalog/2014/61.html

[ea81slush]

Great stinger. got some mates that will like those details.