problem with my 350x

[wheeler]

I have a question about my 1986 honda 350x.
When I am riding it and got it topping out it breaks up bad but only at top end.
When I am tooling around low and mid range is fine.
I rebuilt the carb with no luck.
If anybody has any advice it would be greatly appreciated

[NOS_350X]

do you have any mods? or changed the jetting? It sounds like its WAY rich on top.

[monster 84r]

my 250r was doing that, kinda sputtering in high rpm's. it was because i had a crappy plug, bad gas, old carb etc. i cleaned the carb, checked reeds, put in new gas, new plug, and it hasnt sputtered since. you could have a problem with jetting , but im an idiot when it comes to that. im sure some of the 350x guys here know whats going on.

[NOS_350X]

Clean your airfilter, check your jetting, and make shure that your sparkplug is tight, a loose spark plug cand do that.

[seadoo650]

Don't forget to check your intake rubber for cracks.

[NOS_350X]

Don't forget to check your intake rubber for cracks.


That wouldnt cause it to sputter at high rpm's

[OldSchoolin86]

That wouldnt cause it to sputter at high rpm's
I think he's refering to the lean condition it could create. A severe case would make it break up.