06-29-2020, 11:56 AM | #1 |
Join Date: Feb 2020
Posts: 35
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Hawk 250 sputtering when hot
my bike was running fine, but now it spits and sputters when it's hot. Until it warms up, it runs fine. I have a 110 jet installed and the fuel mixture screw out 1 and 1/2 turns. I'm about at the end of my rope here!
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06-29-2020, 12:44 PM | #2 |
Join Date: May 2020
Location: Philadelphia
Posts: 115
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What does the spark plug look like?
You may still be lean. I'm having the same problem at higher speeds. I have a 115 main installed and it seems to miss and stutter above 50mph nearer WOT. Fairly sure I need to go up to a 120 main. |
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06-29-2020, 01:34 PM | #3 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,707
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Adjust the valves, they are probably set to tight. Valves aren't sealing once it up to running temperature.
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