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Yamaha ttr 90 dirt bike

My sons ttr 90 is smoking real bad what do you think

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Well i had the same problem with my old ttr 90 it smoked realy bad so i took off the top end an looked at the piston rings an they were fried so i bought a new piston rebuild kit an put it in an changed the oil an it ran like a champ an didnt smoke so thats what i think ur problem is

Posted on Apr 09, 2009

  • Xkaotic215x Apr 22, 2012

    How much does the pistons cost because i need to buy da same thing?

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Hey when does the bike start smoking ??

Posted on Jan 03, 2009

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Dirt 90 sometimes when cold doesn,t start unless u pour hot water on engine then fine after why?

Posted on Dec 20, 2009

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Rebuild engine

Posted on Nov 25, 2008

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Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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Hi, Austin and the usual suspects are:
1. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
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15. Carburetor controls misadjusted.
16. Damaged carburetor.
17. Incorrect valve timing.
18. Weak or broken valve springs.
19. Damaged intake or exhaust valve.
20. Check for engine trouble codes
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