Bogging Issue

[sl0wp0ke]

I have a 98 banshee that is new to me. I am running a stock air box, with k&N filter and holes cut in the lid. It has fmf exhaust, vforce 3 valves, and is supose to be bored out to a 392. It has 30mm ysn carbs on it.

 

When I drive the bike out of the power band it seems to be very boggy(makes little power). Once I get back into the power band and give it a few extra shots of gas it seems to come out of it and work fine. I do not have a lot of experience reading plugs but they seem to be wet . Do you think the bike could be jetted to rich? We pulled the jets out of the carbs but they sizes on them are worn off.

What size jets should I buy to get started, and fine tune from there?

Does anyone else think the problem could be something else?

[sl0wp0ke]

I guess I should add that I live very close to sea level.

[RadarRacing]

Honestly ditch those ysn carbs asap and put stockers or something else on it. YSN carbs are a very poor chinese knockoff of pwks. I am not bashing them cuz they are chinese and not knocking you or your bike at all. Just trying to help you. Those were carbs used on some stock 90cc quads and we never had anything but leaks or problems with them.

[sheerider1026]

I agree ^^^^^

[sl0wp0ke]

What size jets should I use in the carbs? I want a good starting point.

[Larry's Shee]

What size jets should I use in the carbs? I want a good starting point.

So which carbs you going to use?

[Launchpad]

A good starting point is to get some new carbs before those things cause you to mess something up

[J-Madd]

Regardless of brand of carbs, 30 mm is too big. Too little velocity. I used to run OKO 30 mm on a stocker and had similar issues.