Yamaha TZR125 Jet tuning

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Jetting 1993 Yamaha TZR125. Can't get upper rpms to run clean. Maybe it's not jetting issue but ignition? Perhaps HPI iginition is the answer. Or even bigger main jet. 🤔

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This video is bringing back memories omg 😮

christianb
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You should try main jet 260 and secondary 35 with the exhaust valve set on open it is working great

aldrass
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Mullaki hpi sähköt ja alko tekee tolleen ja ei pitäis olla säädöistä kiinni koska ennen ku toi vika tuli nii oli vehje hyvin säädöissä. Löytykö vika?

jokuhei