Makuni question

Yellow_Cad · Oct 23, 2009

I have a 34mm Makuni on my early 850. It was on the bike when I got it a couple of years ago. If anything, it is a little on the rich side. In nice weather at sea level, it is fine all around but with elevation and/or cold it is great at idle and from 2800 RPM all the way up, but from 1000 to 2800, it can get pretty ragged to the point of being a nuisance. Any thoughts on what is best to do? Thanks.

ML · Oct 23, 2009

Could be the slide cutaway. A number 3 on a VM34 is generally a good thing. Found with modern fuel, richness or similar fouling is worse in the low end. Most of the Amal's need to go up 1 or at least 1/2 a cutaway increase. Check your Mikuni cutaway number and maybe try the next size up.

Mick

Cookie · Oct 23, 2009

I assume you mean like going up to Tahoe? Elevation would make it seem richer as the air gets thinner. Wouldn't cold require a richer mixture? I guess that kind of confuses me.
I'm running Mikunis on one bike now and if I keep the plugs brown she is OK all the way around. I'd wonder how long since the carb was serviced to start with, I assume you probably are starting tuning a fresh electrical tune up and good battery.

Bonwit · Oct 23, 2009

Here's a link to a site that has some good info on tuning the Mikuni. I found it pretty helpful.

http://www.iwt.com.au/mikunicarb.htm

Makuni question

Yellow_Cad

ML

Cookie

Bonwit