What generally causes high-speed missing?

[biederboat]

I have been running a "new to me" 1988 Suzuki DT 140 for a few hours. It's been running fine but on the final leg back to the dock today I felt a distinct missing (not real bad) running about 4600-4800 rpm. I previously (before I even ran it) cleaned out all carbs and it idled fine when we got to the dock. While it was missing, I squeezed the primer bulb, didn't seem to help but I didn't have a lot of time to do it. What kind of easy things can I test/check to narror down the problem?<br /><br />Thanks,<br />Biederboat

 

[bigbrownbuku]

Re: What generally causes high-speed missing?

start with spark plugs. visually check all your spark plug leads for crack/damage too. try another gas tank and line with good gas.

 

[Texasmark]

Re: What generally causes high-speed missing?

Ditto on the plugs.

 

[robert graham]

Re: What generally causes high-speed missing?

It can be electrical, plugs, wires, etc., or fuel related, which could be dirty carbs, lean fuel condition, can fry a piston quick!...better check it out.