Hi guys
Wonder if I could get some advice on DCNFs. ie - fitting twins to my 1835 and would like to know approximate jet sizes to start with and where to purchase additional jets from. Any help would be greatly appreciated.
Cheers

you prob need to give more info.
ie. what cam, valve sive, exhaust size, intended rpm etc.

These are 2 sites woth reading on how to jet your carbs

http://www.redlineweber.com/html/Tech/Table_of_contents.htm 

http://www.aircooled.net/gnrlsite/resource/articles.htm 

I have scanned some pages on DNCF's but it is at work and i am away for 2 weeks. Try Helterskelter or Cray. I believe they both have the pages

As for jetting sizes
Idles - what ever the motor wants. 95% of cases it is a 50 - 55 idle. That said my IDF's want a 40 Read those articles and you will see that there is a sweet spot on the mixture screws. THIS ALONE determines you idles

Mains should be 4.1ish X venturis size. If you have 32mm vents then a 130ish jet is a good starting point

Airs shoud be 50+ your mains.

So in my case it is 40 / 130 / 180. This is with a F11 Emulsion tube

Your vents are determined by your valve size. They say 3mm small than you inlet or say your exhaust valve.

28mm vents are too small for anything. A stock valved head (35/32) should have at least 32.

A big valved 40/35 should be at least 34 or 36

Where to buy?
Well dunno about Tas but most go fast shops sell jets. A company called Carburettor Service @ Burwood Sydney does mail order. Cant find the # at the moment

[Edited on 30-9-2003 by blue74l]

can email stuff at your request.

send me a proper email account as one is 44kb & the other is 2mb!!