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Yz125 01 power loss

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Hey guys, got a yz125 just bought but it has no bottom end power... I can't clutch up a wheelie in 2nd gear Even if I hit the rev limiter! The compression feels normal. But it's slow taking off but gains speed gradually

Any ideas how to fix this? Thanks

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I'd check gummed power valve if it has one. Gearing stock? Reeds? Idle and run fine? Could be card issue. Does it sound fine when running? No deep bogging? All things to check. Start easy like air filter and move to more difficult things. But check PV for sure

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