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I have a 85 honda trx 125 its smoking bad I was wondering if my piston rings are fried

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  • Master
  • 739 Answers

Could be bad rings, bad valve seating, bad valve seals...

Posted on Nov 17, 2014

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6ya6ya
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Posted on Jan 02, 2017

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Darkoverlord
  • 11 Answers

SOURCE: 85 suzuki 125 4 wheeler that is out of time how do i time it

With your piston @ TDC (top dead centre)(check the timing marks) all of your cam lobes should be pointing as far away from the valves (or rockers) as possible. Alternatively, the cam lobes can all be very close to opening the valves. This is called "rocking." Once you have set it up like this, you should turn the crank in the direction of rotation to check that none of the valves touch the piston. Keep turning the crank to check the valve are opening and closing at the right times, ie "****, squeeze, bang, blow"

Posted on Jul 19, 2009

SOURCE: YZ 125 Keeps burnig piston & Ring on Exhaust

only reason would be your running too lean. which causes more heat, which causes pre-gnition and pinging. Also if timing is off you create more pressure which in turn causes more heat

Posted on Nov 09, 2009

dmsr63
  • 2050 Answers

SOURCE: how do i go about replacing the piston and rings

Take off seat, and tank.
Drain coolant, remove exhaust, remove coil, and ground wire from head.
Remove triangle head stays, and spark plug.
Remove right side power valve cover, and clip and spacer for the power valve arm.
Remove four cylinder nuts.
(If you remove the lower radiator hose that goes between the left and right radiator, you can get the cylinder off without removing the head.)
Use a soft blow, or dead blow hammer to free up the cylinder (Piece of wood)
Use kick starter to get piston low, and carefully remove cylinder upward.
Put a rag around connecting rod, and remove piston pin clip on one side. (So the clip doesn't fall into engine) Then push the pin out and remove the piston.
Note, you will have a mark on the left side of the cylinder of "A" or "B" for a stock piston, but Wiseco's don't use this.
Use caution when putting on the new ring, and getting the cylinder onto it as not to twist the cylinder because it will "catch" the end of the ring and do damage.

Posted on Dec 09, 2009

  • 409 Answers

SOURCE: How do I get to the piston rings on a 1981 honda xl 500 off

the cylinder will slide off the top of the piston, then you can replace the rings and slide the cylinder back down over the top of the piston. The bottom edge of the cylinder sleeve should have a small chamfer in it to aid in getting the rings into the cylinder.

Posted on Mar 13, 2010

  • 12 Answers

SOURCE: a white smoke coming out from my exhaust. do i

could have too much oil in it. Check oil level. If this is a reaccurring problem , suspect fuel leaking from carb. into oil.

Posted on Apr 21, 2010

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1 Answer

Honda wave 125 producing white smoke


First clean your air filter element, a clog air filter means air will be forcebly sucked from your engine together with engine oil producing white smoke. Or it can be worse, a broken piston ring, you need to change a set of piston ring. do not run your engine if it has a broken piston ring cause it will damage your cylinder block and will cause engine seizure.

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Hi, Rudy and the usual suspects are:
1. Engine oil over filled.
2. Piston rings worn past service specs.
3. Broken piston rings.
4. Piston pin retaining clip failure.
5. Cracked piston.
6. Broken piston ring lands.
7. Hole in the piston.
8. Valve/guide clearance worn past service specs.
9. Worn out valve seals.
10. Crushed or loose valve seal.
11. Gouges in cylinder walls.
12. Cracked cylinder or head.
13. Blown head gasket.
14. Crankcase breather blocked or hose pinched.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
heavy white smoke from exhaust GL1200 Information Questions goldwingdocs...
1986 GL1200 Oil in exhaust
Honda GL1200D Shop Manual
http://www.partsfish.com/page/oem-parts-for-honda
Honda GL1200 1986 Owner Manual

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1 Answer

85 Honda trx 125 ran great when parked, kids tried to start and no luck. Checked spark, seems really weak, getting fuel. Any suggestions?


Start with a fresh spark plug. Part of the spark may be traveling to ground via the carbon deposit on the ceramic electrode insulator. Drain the carb; condensation in the gas tank may have built up in the carb float bowl. Engines don't run well with water as fuel. While servicing the bike, clean the air filter and lube the cables.

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Bad Piston,Bad rings,bad valve seals,Cracked cylinder head.cracked block. Don't forget now there is a lot of suction and compression going on in a motor. If any of the above are happening in an engine the suction will pass oil through a bad piston or rings or any of the above and cause Blue smoke and spit oil out the exaust along with blue smoke.

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I Have a 1978 Honda xl125 dirt bike .... my problem is that i have to change the spark plug ever second or third ride.. it will not make any spark after. the spark plug gap will be all black ( the side...


Sounds like carbon fouling from excessive oil being burnt. Is the exhaust a bit smokey? If so, a new piston and rings et may well be required.

Oct 23, 2010 | 1983 Honda XL 125 R

2 Answers

A white smoke coming out from my exhaust. do i need to change already my piston, piston ring and piston lining?


could have too much oil in it. Check oil level. If this is a reaccurring problem , suspect fuel leaking from carb. into oil.

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2 Answers

1985 Honda trx 125 no power at coil wires & no spark at plug


Hi, Sounds like you may have a faulty rectifier. Should not be too expensive to replace.

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I have honda accord 1991,but i found lot oil in one spark plug,what mean thas?


It means that an engine with worn piston rings and/or bad valve seals are allowing excessive oil to enter the chamber.

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you have bad seals in the valves or bad piston rings.

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