Valve spring replacement

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Oct 21, 2013 | 06:53 AM

Lamy1

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From: WESTERN AUSTRALIA

Valve spring replacement

Hi guys can anyone help me with this issue, can I replaced the valve springs without removing the heads or is the frame in the way, I want to upgrade the springs to a higher lift.

Any help appreciated.
Thanks

Oct 21, 2013 | 07:34 AM

Hillsidecycle.com

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While Goodson does offer a tool to allow that to be done in the bike, you may need to double check the valve to valve, and valve to piston clearence if stepping up into a large cam, requiring the removal of the heads.
Scott

Oct 21, 2013 | 08:05 AM

prodrag1320

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From: deland,florida

once you get the r. boxes off,pipes & induction system isn't a big deal to remove to take the heads off.like scott said,more to check than just coil bind

Oct 21, 2013 | 08:46 AM

Uncle Larry

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From: Michigan 15 Minutes East Of Hell

"Hillsidecycle" has given you good info ... and the cost of the tool from Goodson http://www.goodson.com/Installation_Tools/ would more than pay for you gasket set and other incidentals needed, If you're changing springs there must be a reason ... why not pop off the heads and get a good look at the heads? ... Just my.02 cents worth.

Oct 21, 2013 | 09:44 AM

Lamy1

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From: WESTERN AUSTRALIA

Thanks guys great info, but I have spoken to the guys at S&S , I want to install 583 easy start cams and have been told that if the valve stem diameter is 5/16'' I will need to change the springs, but if the valve stem diameter is 7mm I will not have to change the valve springs doe's anyone out there have any idea what size diameter the stems are likely to be before I remove.

Thanks guys and have a great day ride safe.

Oct 21, 2013 | 01:49 PM

prodrag1320

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From: deland,florida

`05 up uses 7mm valves,springs are good to .600

Oct 21, 2013 | 02:49 PM

Jack the Machinist

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From: California

Quote:

Originally Posted by Lamy1

If you have 5/16 valve stems, it's not just the springs, you also need to shorten the guides, or the retainer will bash into them. This is definitely a machine shop operation.