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Message started by bobdog on 08/29/15 at 23:29:14

Title: carb change
Post by bobdog on 08/29/15 at 23:29:14

Has anyone tried a flat slide carb. On the LS650 ??

Title: Re: carb change
Post by justin_o_guy2 on 08/30/15 at 06:48:12

Yeah, some of the guys who bored it and put a cam in and changed the exhaust created an engine that needed more carb. But slapping that kind of carb on a stock motor? I'm not the expert, but it doesn't sound like a performance changer.

Title: Re: carb change
Post by FerousBastard on 08/30/15 at 09:39:37

The pre '96 DR650 crowd have a single carb like ours, and a flat slide seem to be a preferred alternative. Lancer swears to a simpler round slide VM carb with a flow optimizer installed though. A flat slide vs a round slide carb, very minute performance difference, you'd be hard pressed to feel the difference I'm told.

On a stock stock bike, stock jets in the carb, you'd feel a slight increase in performance if you opted for a different carb tuned for the bike, mostly because of the better tuned jets. Whether you'd feel a difference between a properly tuned stock carb and a flat slide, can't tell. On a performance machine, with the biggest 97mm bore and stage 3 cam, you are supposed to get a bit more top end and slightly more responsiveness on fast throttle opening.

Title: Re: carb change
Post by Dave on 08/30/15 at 10:35:24

I think the big advantage of a flat slide carb.....is compactness. When you get a big honking round slide carb for a Harley V-Twin....it sticks way out in the breeze and knocks on your knee. With a flat slide carb the throttle plate can be big - but the carb doesn't have to stick out as far.

My round slide runs well enough - that I don't see any reason to try anything different.