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Old 11-24-2010, 11:26 PM   #1
Alpinestars102
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What do you think?

Does this look like bent valves? All the other valves are seated all the way down. But these seem to be open some. I did hear tapping after re-timing the engine.

What do you think?
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Old 11-25-2010, 12:00 AM   #2
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No seat, no good! Your right they don't look like they are seated nor do they look aligned with the seat, I'd replace asap. Since your into it this far you could try taking them out and straightening them (not recommended) or have them straightened but you (or they)would have to know what they are doing and keep a pretty tight linear tolerance (if they haven't already been damaged at the seat).
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Old 11-25-2010, 12:14 AM   #3
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no sir, i dont like it
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Old 11-25-2010, 12:36 AM   #4
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what all would i need to take out the valves? to compress it and all that. and could i just buy 2 valves?
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Old 11-25-2010, 01:04 AM   #5
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Old 11-25-2010, 04:35 AM   #6
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I would have a professional do it. At the minimum, you should get the guides and seats replaced and hopefully all of the valves, too. I would replace all of the valves, springs, guides and seats while I was in there and you might as well hone the cylinders and replace the piston rings. Have you priced the valves? I recently replaced all of mine and they are titanium and were surprisingly cheap. Andy at Metric did all of my head work.

Just replacing the two seats/guides/valves leads me to believe you may end up with different compression in that one cylinder. Maybe Patrick will chime in.

http://fiche.ronayers.com/Index.cfm/...DER_HEAD_01-05
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Old 11-25-2010, 11:03 AM   #7
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Sounds like what ill do Richards. Good point on what could happen if just replacing 2 valves. Where could i get the cylinders honed? I havent been able to find where i could get all that stuff from.
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Old 11-25-2010, 01:01 PM   #8
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Andy at Metric Motorcycles on the North side did all of my work. You can try Patrick at Motorcycles Unlimited, too. I am just not sure if he has the equipment to do machining if needed or if he outsources it. You will need a new head gasket and they will most likely want to machine the surfaces a very small amount before reassembling. You can purchase a thinner head gasket and up the compression ratio since you have to buy a new one anyway. I would have them check out the cam chain guides while it's apart, too. They are both great guys and won't bend you over.

http://www.metricmotorcycles.com/HeadWork.asp

http://www.motorcycles-unlimited.com/services.htm

Ask them to source the parts. Even with their markup, it will be cheaper than you can find online most likely. The only thing that sucks on your model is the exhaust valves are quite pricey. I found them on a site that shows what all you need and the quantities. Don't pay attention to the prices and just let the mechanics price the parts with the labor. Andy got mine a lot cheaper than that site and I have 20 ti valves, not 16. Patrick or Andy will be able to determine if you need new guides, seats, springs, etc.

In the left hand box Choose Honda, Motorcycle, CBR600 F4 A (I believe AC is the California model with some slight changes for emissions).
Once the page changes, view CAMSHAFT + VALVE.
http://www.hondapartsnation.com/page...FTRa7AodowK8Ww

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Old 11-25-2010, 02:58 PM   #9
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I believe its the intake valves. Rotate the head and the intake cam goes to tgose valves. I will hit up patrick and see what I need done.
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