SINGLE CARB MANIFOLD

papsck · New Member Joined: Sep 30, 2008 Posts: 5

Hi I run a 840 for sidecar motocross,and have seen in Europe several single carb manifolds with a 40 mm dellorto.Anyone had experiance of these?I have a 41 kehlin flatslide that I am considering fitting.The manifold is made by Willie Appers in Holland.

Jack · Full Member Joined: Mar 15, 2005 Posts: 411

The Keihin F/S will have less air drag through the venturi and bottom of slide in comparison to the Dellorto. The Dellorto's are a good carburetor of their time but when your talking sizes of 40 and up mms, velocity through the venturi is the key for quicker throttle response and a smoother power band over the entire RPM spectrum. Comparing a round slide to a flatslide is like comparing apples to oranges. Even if the Dellortos had a slight edge in peak HP,you need to look at the ease of tuning and advantages of increased air flow of a modern FlatSlide. On a naturally aspirated motor,adding a properly matched F/S to displacemnt,is like adding a small blower,they're that GOOD!

woodman · Full Member Joined: Oct 12, 2008 Posts: 256

How about a picture of one ?

papsck · New Member Joined: Sep 30, 2008 Posts: 5

Pictures of single carb manifold with Keihlin 41 mm fitted to an EML Yamaha 840 motocross sidecar.

Paul

xsleo · Posted: August 9, 2009, 5:05 pm Post subject: Re: SINGLE CARB MANIFOLD

Looks alot like the manifold from a Triumph. They ran good for many years.

despecial · Posted: September 26, 2009, 9:03 am Post subject: Re: SINGLE CARB MANIFOLD

papsck...do you have a contact for willie appers in holland?-is the manifold in the picture his?

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