Welcome to ArboristSite.com! Log in or Sign up to interact with the ArboristSite community.

ArboristSite.com Sponsors
 
 


  1. Please see this post Click Here Please ask questions if you have them!! I hope this is going to be great for us all.
    Dismiss Notice

Yamaha TTR 225 no power under load

Discussion in 'Reader's Rides' started by happysaws, Aug 25, 2018.

  1. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,218
    Likes Received:
    2,014
    Location:
    Somewhere between the north and south poles
    Super off topic here, but here goes.

    I got a 1999 Yamaha TTR225 a few months back, and I cannot get it to have power under load. So far, I've rebuilt the carb, replaced the fuel shut off valve, installed an E3 plug, and replaced the battery. I've even tried oversized carb jets, but those didn't help either.

    It starts up, idles and revs up fine in neutral, but when I put a load on it, it has no power whatsoever. For example, on a straight away, if I bump it into 4th gear and give it full throttle, it'll just sit at the same RPM and not gain any speed at all.

    I'd like to try to avoid paying a repair shop if at all possible.

    Thanks for any help or advice!
     
  2. cuinrearview

    cuinrearview Addicted to ArboristSite

    Joined:
    Oct 24, 2014
    Messages:
    2,426
    Likes Received:
    3,946
    Location:
    Hillsdale, MI
    Is there some kind of screen in the tank? Sounds like a fuel obstruction to me. You didn't mention a filter.
     
  3. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,218
    Likes Received:
    2,014
    Location:
    Somewhere between the north and south poles
    The fuel shut off valve has filters on it, and I replaced the valve because the handle was broken off the old one, so it does have new fuel filters...
     
  4. cuinrearview

    cuinrearview Addicted to ArboristSite

    Joined:
    Oct 24, 2014
    Messages:
    2,426
    Likes Received:
    3,946
    Location:
    Hillsdale, MI
    Blow some compressed air back through the valve and line into the tank.
     
  5. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,218
    Likes Received:
    2,014
    Location:
    Somewhere between the north and south poles
    Got it running (said this before, knock on wood), kept switching carb parts until it had power. Now it doesn't idle very well, but at least it runs for now LOL
     
  6. cuinrearview

    cuinrearview Addicted to ArboristSite

    Joined:
    Oct 24, 2014
    Messages:
    2,426
    Likes Received:
    3,946
    Location:
    Hillsdale, MI
    Is a rebuilt or new carb that cost prohibitive?
     
  7. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,218
    Likes Received:
    2,014
    Location:
    Somewhere between the north and south poles
    Well, maybe a little.
    I did rebuild the carb, as mentioned in my original post. It really started acting up after the carb rebuild, so I put some of the old parts back into the carb, specifically the jets. With the old, original jets reinstalled in the carb, along with a new needle and seat, it runs with plenty of power... Just doesn't idle all that well. If I get the time and/or ambition, I may reinstall the oversize pilot jet to see if that will help with the idle issue.
     
  8. Bwildered

    Bwildered Addicted to ArboristSite

    Joined:
    May 26, 2015
    Messages:
    5,338
    Likes Received:
    2,151
    Location:
    33' South
    Check the valve timing .
     
  9. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    Are you running it without the air filter?

    Steve
     
  10. happysaws

    happysaws Addicted to ArboristSite

    Joined:
    Jun 19, 2016
    Messages:
    1,218
    Likes Received:
    2,014
    Location:
    Somewhere between the north and south poles
    Ya, why?
     
  11. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    We had a problem trying to fix a carb problem on a Polaris, had no power after fixing carb. We put the air filter back on and fix the problem. Original problem was the needle had worn in half at the retainer clip.

    Steve
     
    happysaws likes this.
  12. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    Brother had a TTR225, fun bike on the woods trail, but I like my son inlaw's Kawasaki KDX 220R a little bit better, a lot more power and zip when you want it, hard to bet that 2stroke. Brother also had a Yamaha YZ 250, that was too much power.
    Had to edit.
    Steve
     
    happysaws likes this.
  13. 1Alpha1

    1Alpha1 100% USDA certified abnormality-free.

    Joined:
    Jan 29, 2001
    Messages:
    16,068
    Likes Received:
    13,916
    Location:
    Depends on who's looking for me.....and why.
    If there is a baffle or a spark arrestor in the muffler, pull it out and inspect it. It may be all plugged up.

    I'm not familiar with the TTR225, so it's just a thought.
     
    Flint Mitch likes this.
  14. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    I thought of that also but, don't remember those having one, spark resistor that is.

    Steve
     
  15. 1Alpha1

    1Alpha1 100% USDA certified abnormality-free.

    Joined:
    Jan 29, 2001
    Messages:
    16,068
    Likes Received:
    13,916
    Location:
    Depends on who's looking for me.....and why.

    If it didn't, I'd be surprised. It will have a baffle of some kind though.
     
  16. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    I know my brothers bike didn't have a spark resistor in his, unless it's was welded around the baffle, that part was unremoveable on his.

    Steve
     
  17. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    How's the bike coming along?

    Steve
     
  18. 1Alpha1

    1Alpha1 100% USDA certified abnormality-free.

    Joined:
    Jan 29, 2001
    Messages:
    16,068
    Likes Received:
    13,916
    Location:
    Depends on who's looking for me.....and why.
    I forget what year it was, but back then, all dual-purpose m/c's imported into the USA had to have a USFA spark arrestor.

    Mid 1970's maybe?
     
  19. s sidewall

    s sidewall Addicted to ArboristSite

    Joined:
    Apr 28, 2014
    Messages:
    5,447
    Likes Received:
    6,759
    Location:
    Bostwick, Ga
    Bro's was a 2014, YZ 250 ws also a 2014. Like I said, don't remember seeing one on his TTR.

    Steve
     
  20. 1Alpha1

    1Alpha1 100% USDA certified abnormality-free.

    Joined:
    Jan 29, 2001
    Messages:
    16,068
    Likes Received:
    13,916
    Location:
    Depends on who's looking for me.....and why.
    A mystery wrapped inside an enigma perhaps? :popcorn2:

    I did find this exhaust parts schematic. If you look at part #8, you'll see some "fins" on the muffler insert. Those act as a spark arrestor.
    You can - / + to enlarge the screen. If the holes in that insert are plugged, the bike will not run properly, if at all.

    https://www.yamahapartspro.com/oemparts/a/yam/50044ae9f8700209bc7909eb/exhaust
     
    s sidewall likes this.

Share This Page