Valve job advice please

[deyo27]

what grit is the fine I used 600 grit on mine and it worked ok it was a little slow but you wont take too much off. Look on you tube for some tips.

[snyderman]

I took my first shot at lapping the worst seat (#1 exhaust) and got a nice silver ring on the valve, but the seat still had pits. I put the springs back in and poured some brake cleaner (the only liquid I had handy) in and it leaked right through. I am starting to think that I need the seats re-cut. If I do this, do I need to have the valve re-ground? what else needs to be done? the guides seem good and tight. If I can lap the intakes, can I have just the exhaust seats cut? I talked to a machine shop but they wanted to do a full valve job. They charge $162 for a standard 8 valve job.I need to know what my options are, and at what point it would make more sense to get a different head. I guess I am worried about buying a used head with bad seats as well. any advice on how to shop would also be appreciated!

[FiremanBob]

If the pits are at all deep, it will take forever to lap them out by hand. (Remember you're not cutting the pits, you're cutting everything except the pits to get down evenly to the deepest part of the pits.) I would deliver the head and valves to the shop so that they can check for leakage before delivering it back to you - for that money, there should be none. I would also check references on the shop unless you already know and trust them for quality work.

[snyderman]

Thanks, I am going to bring the head and valves in and let them go at it. I talked to them on the phone and they tell me that that price includes bead blasting, cutting seats, grinding valves, lapping and reassembly. The only thing not included in the price is for seals, which will be replaced ($3.50 ea.). I will ask for references. Anything else I shouild be asking, or aware of?

[Nessism]

I strongly recommend you find a motorcycle specific machine shop or head guy. Car guys may be okay but I wouldn't trust them with my bike unless you find someone that has a personal reference to the quality of their work.

[snyderman]

Here is a link to the shop. It sounds like they are a motorcycle shop. http://www.billbune.com/