Bog when I hit a bump or jump

[Ryan02400ex]

Sometimes when I'm riding hard, in the upper part of 3rd or 4th or 5th my quad will just bog, after I hit a big bump or jump, or even if I'm just hard on the throttle. I have to let it idle before I can rev it without it bogging. Does anyone else have this problem? Someone explain it to me!

[400man]

that happened to me before, several times on this one trail behind the house where there was a sharp bump, every time i hit that one spot it was like my motor would cut out for a split second.

[Ryan02400ex]

Ya I'm thinking its the spark plug cord or something in the carb, do you still have this problem?

[CJM]

Check the spark plug/boot to make sure they are on. Then check the float in the carb to make sure it has that little cage in the carb and the floats good.

[Zakradu398]

Could be a possible jetting issue. Whats your mods, elevation and jetting specs to start out with.

[Ryan02400ex]

It's got a J.E. 426 11:1 with a slip on and k&n filter 42 pilot and I think a 162 main but I'm not 100% sure, I don't know the elevation but I'm in Wisconsin

[CJM]

Thats a tad bit lean imho, course elevation might have a bit to do with it. was at about 175 with a similar setup. But I am at sea level.

[Zakradu398]

Def a lean problem and that's causing your studdering. I have a 407 11:1 and hot cam with a 170 main and 42 pilot.

[Ryan02400ex]

I'm at 907 feet above sea level where I normally ride. Has anyone ever tried the sigma jet kit?

[CJM]

Jet kits are something we frown upon here. Your much better served just buying individual jets from your dealer or online at www.jetsrus.com

you need approx a 170-175 main. I would also take the time and clean the entire carb up when you change the jet, including the accelerator pump.