Question about 2003 Yamaha YZ 125

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How do I remove the piston from my 2003 YZ 125?

Posted by jakephair on

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1 Answer

Gregg Mahin

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Hi, Jakephair for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Yamaha yz 125 top end rebuild
YZ125 Top End Rebuild
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on Jul 19, 2016

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5 Related Answers

Anonymous

  • 112 Answers

SOURCE: removing water pump impeller

you might have to split the case to get to the back side of the impeller.

Posted on Mar 29, 2009

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tombones

  • 3567 Answers

SOURCE: 2003 yahama yz 125 radiator

Google " motorcycle salvage yamaha ". You should be able to find a good used radiator there.

Please rate this solution. Thanks

Posted on Apr 09, 2009

goalie39

Ed

  • 479 Answers

SOURCE: Can I bore My 2001 yz 125?

It would be best to take it into a shop and have the machinist check it out before buying any parts, he should be able to guesstimate the amount of over bore required if it is at all possible, once you have this information, you can source the nessessary parts.
some of these type of parts are non returnable, best to play it safe.

hope this is of some help.
Ed

Posted on Apr 26, 2009

tombones

  • 3567 Answers

SOURCE: I have a 95 yz 125 head and 98 yz 125 bottom end.

You have a 50/50 chance that they will work okay. All the mounting holes need to line up and the cooling holes as well. Get a head gasket for the '98 and see if all lines up. Will the exhaust pipe fit the '95?

Posted on Apr 30, 2009

Anonymous

  • 128 Answers

SOURCE: new piston break-in procedures for a yz 125 2

let the bike idle for the first min or so then give it a few quick burps on the throttle let it warm right up to operating temp then drive it go through the gears nice and easy first couple times after that you should be able to start opening it up and riding it like you normally would.

Posted on Sep 20, 2009

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1 Answer

Alrite ? Iv got a yz 125 2001 it's had new piston


Hi, Dean for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals
yz 125 tips and tricks YouTube
Yamaha YZ 125 02

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


May 11, 2012 | 2003 Yamaha YZ 125

1 Answer

When should you replace the piston rings on a yz125


Hi, Anonymous for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
YZ125 piston life Yamaha 2 Stroke
YZ125 Part 15 2 Stroke Installing Piston Rings Cylinder and Cylinder Head
YAMAHA YZ125 Owner Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e


Mar 17, 2012 | 2003 Yamaha YZ 125

1 Answer

1989 yz 125 has a flat piston or dome piston


hiya

flat piston

hope this helps

John

Nov 02, 2011 | 2003 Yamaha YZ 125

1 Answer

I have a 2000 yz 125. Melted a hole in the piston but didnt score cylinder. Replaced top end. Wont start. Has good fire. Crank case oil was a little grey. New plug,fluids,fuel.


I would be checking compression it may not be visible score on cylinder but it does not take much to loose compression on small bore motor with one piston ring and 11 years old

Mar 03, 2011 | 2003 Yamaha YZ 125

1 Answer

How much would it cost to fix a 2003 yz 125 piston.


You can buy a new one for around a $100 dollars

Oct 08, 2010 | 2003 Yamaha YZ 125

1 Answer

Yz 125 bog


Sounds too lean to me or lacking fuel.

Partially blocked jet in carb. May have to remove / clean.

Check also that carb butterfly / piston is travelling to full open position.

Dec 21, 2009 | 2003 Yamaha YZ 125

1 Answer

My yz 125 cut out when i put it into gear! why?


The piston and rings have to be replaced if you haven't done so in the last 100 hours of riding.

Jun 20, 2009 | 2003 Yamaha YZ 125

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