This is a CYLINDER HEAD REBUILD SERVICE for the 2001-2005 year models of your Yamaha YFM660R Raptor Four-wheeler.

You mail in your old cylinder head to us, and we'll remanufacture it and send it back to you ready to bolt on and go for a quick and easy top end rebuild.

PLEASE NOTE: you will be required to mail in your old cylinder head so we can machine it.

Here's what's included with this remanufacturing service:

1. Your head will be hydrosonically cleaned and beadblasted.
2. We will then check the guides to make sure they are in spec, and we will measure the spring free length to make sure they've not collapsed. 90% of the time the valve guides and springs are within spec and still good so they are reused. We do, however, tumble clean all the parts so they come out very clean and look like new. If, however, your head needs new guides or springs, there will be an additional charge for these items.
3. We will re-cut valve seats and install NEW valves and NEW valve stem seals.
4. We will lap in the valves and the final step we vaccuum pressure check the head to make sure the valves are sealing properly.

Let's face it. All machine work is not equal. When it comes to machining, you get what you pay for. We invest the time in every remanufacturing service we offer to provide only the highest quality workmanship to very strict tolerances making our machine work second to none. We have shops all around the world that rely on us every day to provide them with the quality machining they've come to expect over the years. The machining you receive will be to the same quality standards. We also offer repair manuals as well. These will walk you through every step of the disassembly and rebuild and also include tolerances, torque specs etc, so be sure to check it out.