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Fantic Tx250 125Cc Not Revving Out

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Hi there

Just finishing rebuild on the bike, and it fires up but holding the throttle on full only just gets it to tick over and wont rev out. Checked needle is moving with the slide - it is !

I did get it to clear and rev but then had a fluff and backfire. starting up again and it just ticks over holding the throttle pegged.

Timing ????

As always ...........was OK when I took it apart !!

Any help appreciated

 

cheers

John

 

Edited by john b

  • 3 months later...

The very early TX250's had smaller diameter crank shaft seals on the flywheel side. 21mm rather than 22mm (or something like that)

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