How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Doug E. Your Own Question

Doug E.
Doug E., Kawasaki Master Technician
Category: Motorcycle
Satisfied Customers: 2877
Experience:  Professional motorcycle mechanic since 1978. Vintage motorcycle restorer.
7400257
Type Your Motorcycle Question Here...
Doug E. is online now
A new question is answered every 9 seconds

How do I replace a timing chain that has come off the top ...

Customer Question

How do I replace a timing chain that has come off the top spocket on 225cc Yamaha Moto 4 wheeler. How do I put it back on and get it back in correct time.   I can only see one mark on the top sprocket. How to I find top dead center and the compression stroke? Will I have to remove the head to do this? The motor has a removeable civer that exposes the top timing sprocket.
Submitted: 6 years ago.
Category: Motorcycle
Expert:  Doug E. replied 6 years ago.
HiCustomer

If your chain came off then you have some problems. Either your chain is shot or the tensioner is bad. Check out both before you put it back together or you will damage your engine when you run it.

You only need to pull the sprocket cover to do the work. You may be able to feed the chain around the sprocket one link at a time by removing the tensioner, or you can pull the sprocket bolt and time it and then put the bolt back in. You have to reset the tensioner in any case or it will be too tight. I am posting a diagram below showing the marks to use. It's for the 200, but the 225 uses the same marks. I have the exact same machine and it's a great ATV. Let me know if you need any additional help.

Doug

graphic
Customer: replied 6 years ago.
Reply to Kawasaki Doug's Post: I have it back on but the chain is very loose. How do I adjust it to remove the slack? Your diagam was very helpful. Do you have one for the tension adjustment?
Thanks Tim
Expert:  Doug E. replied 6 years ago.
Hi Tim,

Pull the tensioner off so you can inspect it. It may have broken or just be stuck. When you have it out the pin should push all the way out and you should not be able to push it back in. If you can, it's bad and must be replaced. If the pin doesn't push out all the way (it has a stop built-in and will come out all the way until it hits that) it is either stuck or the spring inside is broken.

There are two styles and I am not near my machine so I can't remember which one that model uses. One has a very short bolt on the tip. You pull that and insert a thin flat blade screw driver and rotate the adjuster to back off the tension so you can push the plunger back in. The other style has a ratchet type plunger and you push the little catch to release it so it will go back in. Once you take it off you will be able to see how to reset it. I'm going to redo my drawing and add that information for future use so thanks for bringing that up.

Be sure to set your valves as long as you are working in that area. They adjust when at TDC. I would also check the compression once you are done. That will tell you if any damage was done to the valves when it jumped time. If damage was done, you will need to replace the bent valve. I would also replace the chain and tensioner to prevent it happening again. I think they make an aftermarket chain that has a master link in it so you don't need to even touch the lower end. Just connect the new chain to the old and feed it around the crankshaft sprocket.

Doug

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
< Last | Next >
  • I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry. Stephanie P Elm City, NC
  • used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future. David L. Richmond, TX
  • 9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much. Phil Marysville, CA
  • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
  • As a single woman, I really appreciate an excellent and affordable opinion.
    Thank you Geordie, I will not hesitate to contact justanswer in the future!
    Sue Charleston, WV
  • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
 
 
 

Meet The Experts:

 
 
 
  • Harley Tech

    Motorcycle Mechanic

    Satisfied Customers:

    1297
    35+ Years Experience on Harley/Honda Specialising in HD Tuning Super Tuner etc
< Last | Next >
  • http://ww2.justanswer.com/uploads/harleytech/2008-09-21_185638_phpts91u2_c2pm.jpg Harley Tech's Avatar

    Harley Tech

    Motorcycle Mechanic

    Satisfied Customers:

    1297
    35+ Years Experience on Harley/Honda Specialising in HD Tuning Super Tuner etc
  • http://ww2.justanswer.com/uploads/EX/extremeccs/2012-6-10_19914_steve11024x768.64x64.jpg Steve's Avatar

    Steve

    Motorcycle Mechanic

    Satisfied Customers:

    6027
    30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
  • http://ww2.justanswer.com/uploads/jpolicky/2009-4-3_43150_200009a.jpeg.jpg Jeff Policky's Avatar

    Jeff Policky

    Motorcycle Mechanic

    Satisfied Customers:

    2381
    Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP
  • http://ww2.justanswer.com/uploads/Guest/2008-01-28_125643_phpbZSI1u_c2AM.jpg TIMOTO's Avatar

    TIMOTO

    Motorcycle Mechanic

    Satisfied Customers:

    1101
    Honda registered technician, silver level award, former Kawasaki/Suzuki tech, 40+ years exp.
  • http://ww2.justanswer.com/uploads/LoriExpertsMod/2010-04-15_002245_192503.jpg Andre Pilon's Avatar

    Andre Pilon

    Motorcycle Mechanic

    Satisfied Customers:

    1027
    Over 25 years experience, ICS, MMI, Owned shop for 12 years, worked tech-support for Harley Davidson
  • http://ww2.justanswer.com/uploads/GlennAII/2008-5-26_12926_YUMMY_2.jpg Glenn Adams II's Avatar

    Glenn Adams II

    Motorcycle/ATV Technician

    Satisfied Customers:

    393
    6 years Motorcycle/ATV/Water Craft; 4 years auto; 18 years carpenter
  • http://ww2.justanswer.com/uploads/AS/asphaltcycles/2012-7-31_151258_311842101502880177646218277720n.64x64.jpg asphaltcycles's Avatar

    asphaltcycles

    Motorcycle Mechanic

    Satisfied Customers:

    383
    I operate a motorcycle dealership and CCS Ducati Race team.