Knock/rattle on startup Xt 225.

Discussion in 'Thumpers' started by Packedpunches, Aug 27, 2021.

  1. Packedpunches

    Packedpunches n00b

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    Hey guys, My XT 225 (same motor as ttr 225) knocks when I first start it if I rev the motor (a little) without letting it idle for a bit.. I checked the oil level and it's at the top mark when warm when balanced out so not an oil issue? It almost sounds like a dry start, or maybe the sound is a little piston slap or cam chain slap?. The bike has over 5000 miles on it now and I changed the oil every 500 miles. If i let the bike idle for a few seconds first it doesn't do it.. Is it normal and I just need to wait for the oil pressure to build up? I don't remember it doing this when I got it, I just want to take care of my bike the best I can.. Also, the valves are due in about 500 miles if that makes any difference - here's a short video, it doesn't last any longer than how long the vid shows it for.
    #1
  2. NJ-Brett

    NJ-Brett Brett

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    Make sure you have the correct oil filter.
    Many motors were/are ruined by the wrong filter which looks almost exactly like the right filter.

    5000 miles, the engine should be like new and just broken in.


    #2
  3. Packedpunches

    Packedpunches n00b

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    It's definitely the right filter, Thanks for the response!
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  4. NJ-Brett

    NJ-Brett Brett

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    Sounds like the valves to me by the rate of tapping.
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  5. Grreatdog

    Grreatdog Long timer Supporter

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    That's where I would start, too. Those motors have a relatively short valve inspection interval.

    At least my XT200 did and that's basically the same motor.

    My old XT200 called for checking the valves at 2500 miles then every 2000 miles.
    #5
  6. Nobade

    Nobade Keep on keepin' on...

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    Mine does that too, I just let it idle for a bit until I hear it change and I know it's time to take the choke off. Just like it's owner, it benefits from starting the day a bit slow and not in a hurry.
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  7. Packedpunches

    Packedpunches n00b

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    Okay cool, haha.. Just curious how long yours has done it for? I don't remember mine doing it when I first got it. I'm gonna take it to get the valves checked/adjusted next week for peace of mind :)
    #7
  8. Nobade

    Nobade Keep on keepin' on...

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    The whole time I've had it. But yes, making sure the valves are in spec is always a good idea.
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  9. Grreatdog

    Grreatdog Long timer Supporter

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    #9
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  10. lamotovita

    lamotovita DAMN SNOWBIRD! Supporter

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    What oil are you using?
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  11. Packedpunches

    Packedpunches n00b

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    For sure, When I got the bike it had
    I use 20-50 MC oil, It was recommended by the guys in the XT forums to use a little bit thicker oil. But now I wonder if it's too thick while cold? What oil do you use?
    #11
  12. Nobade

    Nobade Keep on keepin' on...

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    That 20-50 Mobile 1 V-twin oil works great for me.
    #12
  13. lamotovita

    lamotovita DAMN SNOWBIRD! Supporter

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    I use 15-40, but your 20-50 should be fine.
    #13
  14. 8lives

    8lives Dharma Bum

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    XT225 another bike I wish I’d have kept!
    #14
  15. Bitingdog

    Bitingdog That's not my dog

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    Sounds like a cam chain tensioner
    #15
  16. MC_Collector

    MC_Collector Retired and riding!

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    I have a 1999 and 2007 XT225's. Bought the 2007 in 2007 with 30 miles it has ~6000 mi now and has never done the noise of your video. However the 1999 was bought used in 2009 with 6700 miles and has a noise similar to what yours has and is currently at about 26000 miles. It usually lasts < 15 seconds after a cold start and seems to run perfectly otherwise. I know the older one uses a cast iron cylinder liner while the newer one uses nikasil plated aluminum bore. I've never had either apart, but I would guess mine sounds like very slight piston slap to me. I would check the valve clearances and not worry about it I were you.
    #16
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