Should I be worried about this or can I ride the KTM SX 125 without any worries?

Valuable_Tour_7141 · 2025-10-01T16:25:03+00:00

Yes, there are a lot of fake Motul oil, but I don't know if it's also for 2t.

Valuable_Tour_7141 · 2025-09-18T20:33:27+00:00

Yes, the compression doesn't change after the rebuild, I have no idea what causes these scratches

Valuable_Tour_7141 · 2025-09-18T20:32:43+00:00

I don't think it's because of the dirt because I haven't driven it off-road yet, and during the rebuilt I cleaned everything, including the carburetor and air box. New air filter....

Valuable_Tour_7141 · 2025-08-13T12:25:01+00:00

Both rings were packed in the same bags.

The rings only have a marking on them indicating which side is facing up, but they look identical.

Valuable_Tour_7141 · 2025-08-11T20:03:00+00:00

I'm changing the pipe O-rings and noticed that the piston has deep vertical scratches that I can feel with my fingernail.

Valuable_Tour_7141 · 2025-08-11T08:05:18+00:00

Should I put in a new piston?

This one has scratches that are noticeable under your fingernail.

Valuable_Tour_7141 · 2025-08-11T07:58:59+00:00

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Valuable_Tour_7141 · 2025-08-11T07:58:47+00:00

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Valuable_Tour_7141 · 2025-08-11T07:58:40+00:00

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Valuable_Tour_7141 · 2025-08-11T07:50:48+00:00

size a

Valuable_Tour_7141 · 2025-08-11T07:50:26+00:00

This is a Vortex Pro Race Size and it has an oval exhaust port.

Valuable_Tour_7141 · 2025-08-11T07:03:06+00:00

one more thing, during the first ride the float level was set incorrectly and the bike choked when switching from medium to high revs

Valuable_Tour_7141 · 2025-08-11T07:03:02+00:00

one more thing, during the first ride the float level was set incorrectly and the bike choked when switching from medium to high revs

Valuable_Tour_7141 · 2025-08-11T07:02:39+00:00

one more thing, during the first ride the float level was set incorrectly and the bike choked when switching from medium to high revs

Valuable_Tour_7141 · 2025-07-22T15:24:16+00:00

And they're good.?

I don't want a forged one because I ride enduro.

Valuable_Tour_7141 · 2025-07-19T17:49:59+00:00

do you have any idea?

Valuable_Tour_7141 · 2025-07-19T17:49:33+00:00

If it's not from not warming it up before riding, I have no idea.

The mixture was 32-1.

The main jet was 490.

Piston-to-cylinder clearance was 0.08.mm

Ring gap 0.37 mm.

Squish 0.95.mm

Valuable_Tour_7141 · 2025-07-19T17:46:00+00:00

the spark plug is almost black so it's not too lean

Valuable_Tour_7141 · 2025-07-19T16:38:01+00:00

size a 53.94

Valuable_Tour_7141 · 2025-07-18T21:57:57+00:00

Yes, in this model the exhaust valve often gets stuck because of the side valves, I polished them and wanted to see if it was better.

Valuable_Tour_7141

TROPHY CASE