Carb types

PLUMMEN wrote:

DoubleDub wrote:

If fuel economy is a concern, stick with the 26's. I'm happy with mine and I have a 1075cc kit, but not much for my pipe/cams.

ya wimp! :laugh: i bet you dont even have a billet cam chain tensioner on there,youll have to move to california with craig so you guys can start your own unimpressively stock motorcycle club! :woohoo:

I have the chrome shift fork, though. Does that help?

DoubleDub wrote:

If fuel economy is a concern, stick with the 26's. I'm happy with mine and I have a 1075cc kit, but not much for my pipe/cams.

ya wimp! :laugh: i bet you dont even have a billet cam chain tensioner on there,youll have to move to california with craig so you guys can start your own unimpressively stock motorcycle club! :woohoo:

mtbspeedfreak wrote:

Gotcha, I understood that; I guess I just worded my question the wrong way.

What makes a smooothbore a smoothbore? Other than the bore being smooth- aren't most carbs smooth on the inside to better mix the gas and air not to mention flow better? What is flat about a flatside [other than the side being flat. What's flat? Which side?]?

I saw something called a "26mm Smoothbore" the other day- did the guy have no clue or what? That ad caused me to rack my brain too hard which raised all these questions

To put things in a little context, my KZ900 has VM26's on it. People around here get all hot and bothered talking about 29mm smoothies. Would 29mm smoothies be the way to go on a stock 900 with a Kerker? I'd like to get a rack of VM28's, but fuel economy is important to me, so I feel like 28s or 29s would be useless with just a pipe.

Like said, its flat slide, not flat side. Which means the slide inside is rectangular shaped instead of round. This gives better air velocity characteristics.

Smoothbores generally have no cv style butterflys, and have a smoothed transition throughout including the slide base for better air volume transfer, especially at high speed/rpms.

You can use a larger smoothbore on smaller displacement bikes with fewer negative effects than large round slide carbs.

PS. The fuel economy will have nothing to do with the carb size, unless you ride at WOT all the time :laugh: It has to do with your right hand and pilot screw mixtures the most

Significant. I just posted a set of 28's from SudmanRacing on Ebay in the Ebay thread. You'll probably be very satisfied with those, from what I've been told.

If you're looking at 29's you'll probably pay close to the same as new Keihin CRS 29's...

dynoman.net/carb/keiCR.html#cr29