I have a buddy that just got a 350x. It has a pipe and k&n kit and holes in the airbox. It runs good but it hesitates at the point just past an idle. It runs good once it opens up but it won't just putt around without sputtering and dieing. What do you think would fix this. Any help or links would be greatly appreciated

 

Raise the carb needle one, then check the jetting.


Thats a start!

 

rancherman81,

Without a better description on how its acting, its difficult to say.

It sounds like the previous owner didn't really understand jetting; unfortunately, lots of people think just by putting a pipe on and drilling a few a few holes is all that is necessary to gaining power - they miss the final (an MOST important) step, they need to match the gas flow with the increased air flow.

I'm not going to type a lot here, just search my user's name and scan my past posts, you'll get a fairly good idea how to dial in your buddy's 350x. Spend a little time on jetting it correctly, and you'll find all that power that the previous owner missed.

One tip, if you find that the main jet is a dynojet jet (you'll need to check what's in there before you can properly jet) - go ahead and throw it as far as you can, or bury it and forget where you buried it. Just use factory honda jets, they're cheaper, easier to acquire and exactly the same (dynojet (k&n's kit) has their own sizing system so you have to keep going back to them $$$$).

Assuming there's a dynojet main jet installed, all you need to do is head down to the local dealership (or call) and find out what jetting is stock on that machine. Check out my previous posts to see where to go from there.

Finally, I'm not sure how much carb work or jetting you've done, but if you haven't worked on them a lot, have no fear about jetting, once you see how it works its a piece of cake!

Have fun,
ogre

P.S. - That burp right above idle could quite possibly be the motor letting you know that the main jet is too lean (I've seen it many-a-time), just because it seems to run good after that doesn't really say anything. When people say the "right-off-idle" comment, it usually means when they stab the throttle wide-open from idle, it burps, or wants to die. I mean, It certainly could be a pilot jet or jet needle, but I've found that the main jet really seems to control the lifeblood of the engine, especially with a simple pipe and filter change. Good luck!

 

ogre has some good advice but try this first just in case it really was jetted properly the first time. There is nothing wrong with Dynojet since you already have it.

Before changing any of the jetting, I would recommend taking the carb off and spraying it out with some carb cleaner. He might just have some dirt blocking one of the jets. Clean the air filter, oil it, and let it sit overnight before starting. Put in a new spark plug for good measure.

If this doesn't fix it, try taping the holes shut just for a test. Does it get better or worse?

/Jon

 

I agree, testing the current configuration is necessary, I guess I got a little ahead of myself and made some assumptions of the current state of the quad!

Great point NotuRaptor2!

ogre