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Re: DIY XT-225 valve adjust [Re: klm4755] #135947 03/12/17 01:42 PM
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justin_lewis Offline
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"The last mark (the furthest right leg of the "H") is the true TDC where the piston is at the very top and it is sometimes marked "T"."

Patuca, I am bit confused by this statement. So based on this TDC would be the middle |, which is the far right leg of the |--|. Others in this thread have stated that in my 2006 it should be the second solo | after the |--|.

I guess the reason I am asking is cause when I first adjusted the valves the other day I did use the far right | of the |--|, but when I fired up the bike it was clacking very hard. I opened the valves back up and the space was huge. I let the bike cool back off for a few hours and readjusted. This time using the solo | thinking that was the correct TDC. Started the bike up and it sounded much better. Just trying to confirm.

I am assuming if my valves were a bit off the bike would start or run rough.

Thanks!
Justin


2006 Yamaha XT 225 - first bike
Re: DIY XT-225 valve adjust [Re: klm4755] #135950 03/12/17 04:14 PM
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peejman Offline
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I think the width of the |--| corresponds to the cam lobe dwell at TDC. Anywhere in there is fine. If yours made lots of noise, you probably were one rev off from TDC when you did the valves. Both valves have clearance at TDC on the compression/power stroke. You should feel the resistance when approaching it. If only 1 valve has clearance, rotate the crank 1 more full revolution and check again.


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
Re: DIY XT-225 valve adjust [Re: klm4755] #147048 02/17/20 01:49 AM
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Twinrider Offline
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Awesome thread. It would be great if these pics could be updated so they're viewable. :-)

Re: DIY XT-225 valve adjust [Re: klm4755] #147141 02/26/20 12:12 AM
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JPouchet Offline
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Just did a valve adjustment two weekends ago. Followed most of this process but did not remove side cover to check timing marks. Just put bike in 4th gear, turned rear wheel, watched valves open/close etc. a few cycles, Confirmed TDC with wooden dowel in spark plug hole.

at 7,000 mile mark this appeared to be the first valve adjustment on the bike. Both were at zero/0 zippo no clearance cold. Meaning one or more valves were partially open when hot. Could explain why the bike pulled ok when cold but lost power especially at the upper RPM range once warm.

Now pulls like a tractor down low and revs beautifully when I punch it in lower gears. Tossed a few nice rooster tails on the trail this last weekend.

JP

[Linked Image from i.imgur.com]

No problem running with the new Honda CRF250 Rally


Adding some Adventure to my life
Re: DIY XT-225 valve adjust [Re: klm4755] #147377 03/22/20 04:10 PM
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WSUNate Offline
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Do I need a photobucket membership to see the photos clearly?
BTW, super nice set of instructions

Re: DIY XT-225 valve adjust [Re: WSUNate] #147378 03/22/20 04:45 PM
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Az4x4 Offline
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The problem with viewing Photobucket images isn't something you can correct. A long time back Photobucket pulled the plug on displaying millions of images stored in previously FREE user accounts, holding them for ransom while requiring HUGE monetary payments to make them viewable again.

For the most part people gave Photobucket the middle finger and moved to other photo hosting sites, for example IMGUR. Those who posted instructions with Photobucket hosted photos, like this highly popular DIY valve adjust guide, then left the group PRIOR to Photobucket nuking all its millions of free accounts without warning, left behind posts that never will have their blurry photo issues made right.

Sorry to be the bearer of bad news, but that's what we're dealing with when these old Photobucket blurry photos issues raise their ugly head.


"When it's a life-and-death matter, the market for bullshit drops to zero."
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