play in rocker arms

Posted by: Bluedog

play in rocker arms - 10/24/18 04:01 AM

I have a 2000 XT225, 6000 miles, great condition and i have completed a lot of preventative maintenance in the last few weeks. Today i adjusted the valves and found the clearances pretty tight. But got them adjusted correctly. Started it up and it sounded great just purring along. But i didnt get to warm it up and ride it.

When i had it open up i felt like i had some side to side play in the rocker arms. Both the intake and exhaust felt the same. Tomorrow i will start it up and pull the oil pressure bolt and check that i have good pressure to the top end.

But is any play normal? should it be rock solid or just a hint of back and forth? Is there a actual spec for side to side play?
Posted by: Bluedog

Re: play in rocker arms - 10/24/18 03:56 PM

Ok I started it up this morning and pulled out the oil bolt. Emediatly oil was pouring out. What a mess. But ay least i know i have plenty of oil getting to the top end.
Posted by: Reggie

Re: play in rocker arms - 10/24/18 05:30 PM

Hi Bluedog,

you don't need to fully release the oil bolt, you just need to loosen it so a dribble of oil can pass.

Regards
Posted by: #brer15

Re: play in rocker arms - 10/25/18 12:51 AM

Originally Posted By: Bluedog


But is any play normal? should it be rock solid or just a hint of back and forth? Is there a actual spec for side to side play?

That side to side play is normal. No actual spec for it.
Posted by: peejman

Re: play in rocker arms - 10/25/18 03:51 PM

Originally Posted By: Bluedog
Ok I started it up this morning and pulled out the oil bolt. Emediatly oil was pouring out. What a mess. But ay least i know i have plenty of oil getting to the top end.


laugh

Yep, now you know to just loosen it a bit and watch for the oil to start weeping out around the threads.

And I agree that a little side-to-side movement is likely ok.
Posted by: Nic

Re: play in rocker arms - 11/03/18 10:31 PM

I rebuilt my 225 with new rockers and they still had the side to side play, so you have nothing to worry about, i'm sure it's normal.
Posted by: #brer15

Re: play in rocker arms - 11/04/18 12:33 PM

It is normal. Seen it on every vehicle I've adjusted valves on. Those valves have to move several times per second. The last thing you want is any kind of resistance in the rocker arms. i.e. you wouldn't want them snug. There is no side to side movement when the engine is running.
Posted by: Paul49

Re: play in rocker arms - 11/05/18 01:18 PM

Do you boys fit a new washer to the oil bolt when you change the oil? I've usually annealed mine & re-used it but last time out I had a fair leak from the bolt, tried nipping it but it was good & tight.

I've splashed out on a bag of copper sealing washers, I shall anneal & use a new one each time now I've acquired this new found generosity towards my bike.

Horrendously expensive, but these are supposedly proper crush washers.
https://www.ebay.co.uk/itm/6mm-to-27mm-Internal-Diameter-Copper-Compression-Washers-Oil-Seal-Crush-Sump/272746503102?ssPageName=STRK%3AMEBIDX%3AIT&var=571881515859&_trksid=p2057872.m2749.l2649
Posted by: peejman

Re: play in rocker arms - 11/05/18 05:30 PM

I've never replaced that washer, but it doesn't leak.
Posted by: Paul49

Re: play in rocker arms - 11/05/18 08:11 PM

Originally Posted By: peejman
I've never replaced that washer, but it doesn't leak.


Mebbe I've squashed it to death.
Posted by: Reggie

Re: play in rocker arms - 11/05/18 08:50 PM

Originally Posted By: Paul49
Originally Posted By: peejman
I've never replaced that washer, but it doesn't leak.


Mebbe I've squashed it to death.


Hi Paul,

could one be a tad heavy handed?

Regards
Posted by: Paul49

Re: play in rocker arms - 11/05/18 09:10 PM

Originally Posted By: Reggie
Hi Paul,

could one be a tad heavy handed?

Regards


Ayup Reggie, Ha, I try not to be 'cos it's a weakened bolt, ya might remember some time back, I drilled the bolt down the centre & then in from the side near the head to meet that hole. The idea being that the oil flowed with a turn or two of the screw instead of being screwed out more to bleed. Seemed a good idea at the time. Seems it just needs a good washer not a 10 times reused/flattened one cos I change oil & filter every 600'ish miles. It uses a bit anorl, mebbe 150ml to 350 miles. I should write to Yamaha about this.
Posted by: peejman

Re: play in rocker arms - 11/06/18 04:35 PM

Are either of the seating surfaces worn? If they're not flat, it would take a good bit of squish for it not to leak. I just tighten it snug so its not leaking and call it good. Given that the threads in the head can be delicate, I go easy on it.
Posted by: Paul49

Re: play in rocker arms - 11/06/18 04:55 PM

It's fine now m8 thanks, new washer fitted.