2 Stroke plug read KTM SX150

Grovesy98
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Grovesy98
Edited Date/Time 8/5/2021 2:28am
Hi, I know the procedure of a proper plug chop or a full read by checking the base of the porcelain, but for a general idea of how my bike is running would you say these pics show reasonable jetting?

Its a 2016 SX150 and ridden hard on the pipe. Running 40:1 Maxima 927 with UK 97 Ron fuel.

Thanks

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Paw Paw 271
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Paw Paw 271 8/2/2021 10:17am
8/2/2021 10:17am Edited Date/Time 8/2/2021 10:18am
Looks good, but maybe a tad rich or some run time not under a load. You can also this if the compression is starting to fall off. I would not changes the jetting based on what I see here.

PawPaw
Grovesy98
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Grovesy98 8/2/2021 10:33am
8/2/2021 10:33am
Thanks. The last 30 seconds of run time was just cruising to the pits. The piston was replaced and the barrel reconditioned 10.9hrs ago. It runs absolutely amazing
Falcon
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Falcon 8/4/2021 11:06am
8/4/2021 11:06am
If it runs right, leave it! That plug looks Nice. Maybe a hair rich on the pilot but it could be the cruise back to the pits that did it to you. Maybe mess with the air screw a little to fine-tune the slow circuit.
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Grovesy98
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Grovesy98 8/5/2021 2:28am
8/5/2021 2:28am
Thanks guys. Going from feel I would agree that the pilot is richer than the main, and if anything the next change I'll make will be to go up one size on the main, but I'll hold out until the weather starts to cool down

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