Valve Adjustment on a TW225
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Thread: Valve Adjustment on a TW225

  1. #1
    Junior Member bigwilly's Avatar
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    Jan 2019

    Valve Adjustment on a TW225

    Hi folks!

    I've just picked up my TW225, and want to check it over before heading out.

    I was wondering if anyone could guide me on the clearances for the valves? I've got a manual for a TW200, but have also read somewhere that the TW225 uses heads off a different bike. Any guidance?

    I know HOW to do it, just not sure what clearance to set it to!


  2. #2
    Super Moderator Purple's Avatar
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    Mar 2015
    Ynys Môn
    TW200 is as follows

    Intake 0.05-0.09 mm (0.002-0.004 inch)

    Exhaust 0.11-0.15mm (0.004-0.006 inch)

    With the TW225 / TTR, this changes slightly
    The intake is the same as the TW200 - 0.05-0.09 mm (0.002-0.004 inch)
    However, for the TTR225 the exhaust increases slightly to .15-.19mm (.006-.007 in)
    Reading in-between the lines, this would appear to make sense, so play it by ear from there

    No known manuals for the TW225, but it shares the top end from the TTR, so you should be good to go from the above info.

    Make a note of the existing exhaust tolerance, and if it agrees with this, carry on - but .15 is your starting point

    Anyone else out there who has done a 225 conversion on a 200 engine, now is the time to speak up ……
    Badgerflorida likes this.
    (Warning - Forum may contain nuts) ...... Hidden Content

    TW200 - 1998 - Japanese import - 7000 miles on the clock - TW225 Special Edition 2007
    - Hidden Content

  3. #3
    Senior Member TW-Brian's Avatar
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    Dec 2010
    Pleasanton, CA
    Thanks Purple, this is good to know!

    I have probably set the exhaust valves a little too tight on my TTR/XT225 engines.

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  5. #4
    Junior Member bigwilly's Avatar
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    Jan 2019
    Oh man, you guys are so helpful. Thanks a lot!

    This is a great starting point. I assume the clearance of the exhaust valve is slightly larger than that of the TW200 due to bigger engine, meaning more heat.

    I'll pull the side cover off tomorrow to see if I can find the sticker mentioned above. If I find it, I'll post a photo for everyone to see.

    Peterb likes this.

  6. #5
    Senior Member RockyTFS's Avatar
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    Feb 2011
    Hailey, ID

    Purple has the correct numbers for the TW225.
    2018 TW200
    2014 BMW R1200GS LC

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