Whats a flat side carb?

[merv]

My DR250R had a flat slide (same as the DRZs now) and it caused one of the most annoying features of that bike - jerky on off throttle and the damned thing was sticky - later flat slides like on my WR have rollers on the slide to prevent this so my WR is a far nicer bike to ride on the trails than the Suzuki ever was. On the trail you need fine throttle control to maintain traction on slippery surfaces and I even found the Suzuki a pain on the road when you peeled into a corner throttle off and then tried to roll it on - jerk it would go - and on gravel roads I just couldn't do the fine braking throttle thing into corners like you should be able to - so I got rid of that bike.

My VFR has semi-flat slide CV carbs and it is perfect for throttle control under any conditions.

Horses for courses really with road and trail being quite different.

[FilthyLuka]

yeah, my GSXR has 4 flat sides on it. Gotta be smooth with the throttle. Which isn't really that hard as the throttle requires 25 KG's of pressure to turn!

[Henk]

The reason dirtbikes don't have CV carbs is that the slides are held up by the vacuum in the inlet manifold, not dierctly controlled by the throtle. This lets the slide go up and down on however it likes when you hit rough ground. I had a TTR600 that had a weird dual carb setup with one a standard round slide and the other a CV. Nice bike all round but the carburation got a bit odd on the few occasions I took it into the bush and tried riding over whoops.