Cylinder Head Question

[Worm]

Do all year cylinder heads fit on all year cylinders? I know the tach cable hookup is not there on the newer heads but other than that, are they the same?

A friend is about to buy a head from a 2009 from another member on here and his bike is a 2005 but the motor is pre-2004 (I think) because is doesn't have the oil cooler.

I just need to make sure it will fit and work correctly before we go through with the purchase.

[jestercinti]

I think so, but let's get more opinions on the matter...

[Worm]

Anyone else? Bump!

[dmoore]

I can't speak to the particular matches from one year or another but I know from experience with other bikes that piston and valve heads should be decked where they join when mating swap-outs. The mating surfaces have there own quirks from heat stress and torque that are trued up by decking. It's a process that only machining can do. BoreTech in Cincinnati does it. You're looking at about $100 plus shipping.

[adidasguy]

All years fit all years.

Differences:
1. Tach cable
2. Later years have a spring washer in the cams to prevent cam noise. This only makes a difference if you try to use the cams fro different heads. Keep everything together and you don't have to worry about it.
3. Some have the PAIR holes open for a PAIR system. You can block off those if you don't have a PAIR system. if you do have a PAIR system and a new head does not have those holes open, simply remove your PAIR system.

[Worm]

Thanks, Adidasguy!

[Iautorico]

Whats a PAIR system?

[RossLH]

Emissions crap found on some of the later models. Blows air into the exhaust to burn off unburnt and partially burnt fuel.

[Blueknyt]

No diff in heads, other then PAIR system, spring washers were added and can be added to any year.