what heads fit on a 2005 sportster

[rustyjunk]

i am in the process of turning my 883 into a 1200. i got the cylinders bored, and the shop put flat top pistons in. i have been told that flat tops will be too high compression for the 883 heads? if so i would like to buy 1200 heads instead of grinding on the stock 883 heads, nut i dont know what year sporty 1200 heads fit on my 2005? any suggestions?

[zetaseven]

Dave wrote a very good artical on heads the other day an i can't find it. Wish he would make it a sticky.

[Dave63]

Search young Jedi............use the Ford Luke..... er...ah....the Force.

Cutty-McPastey. Not my stuff. But useful at that:

There are 3 generations of Evo Sportster heads:

1986-1990 (4 speeds)
1991-2003 (5 speeds)
2004-present (rubber mounts)

Interchangeability:

Within a given generation, the heads are mechanically interchangeable between the different models, i.e. all bolt holes line up and no needed features are missing. Valve geometry is the same: 27 degree intake & 31 degree exhaust for a 58 degree included angle, and the location of the valve tips is the same.

The rocker box bolt pattern has not changed across any of these generations; a 1986 lower rocker box will bolt right up to a 2006 head and vice-versa. The only thing you need to be aware of is that the crankcase breathing arrangement has changed at each generation. 4-speed models provided no facility in the head for a crankcase breather. 5-speed models incorporated crankcase breathers into the carb mount bolts, and use a different middle rocker box that has a check valve incorporated (aka "umbrella" valve). Rubber mount models use an air/oil separator & check valve unit bolted into the lower rocker box, and do away with the middle rocker box, using a different top cover.

91-03 heads have been successfully fitted to 86-90 models. The major difference you need to be aware of is that the spacing between the pushrod holes is different between a 4 speed and a 5 speed. This is because the cam box geometry is different and the pushrods are at a different angle. So pay attention to the potential for pushrod rub where they pass through the heads into the rocker box.

04-up heads have been successfully fitted to 91-03 models. The new heads have the right front bolt hole relocated inboard 1/4", and also use 7/16 fasteners as opposed to the 3/8 fasteners used on the 91-03 models. You can either modify your existing front mount, or more recently a new mount has become available that solves this issue. Also, be aware that the 04-up heads have larger fins and will overhang 91-03 cylinders somewhat, most noticeable on the left side. You can use your stock 91-03 rocker boxes or use the 04-up rocker boxes, either will work fine.

Any time you're putting a different set of heads on your bike, you need to be aware of the chamber size & shape and how it relates to the piston you're using, to make sure they're mechanically compatible and will give the desired compression ratio.

[gruss]

You Da Man....Dave.....

[Dave63]

Sticky now posted in the Sporty section. Includes all sporties, Buell and 883/1200 specifications. Praise god whoever made it or did the research, cause it wasn'y my tight white ass, rather, I just found it by researching.

Cut...paste.

God bless the internet.

[gruss]

Originally Posted by Dave63

Sticky tight white ass paste.

God bless the internet.

[zetaseven]

Thanks Buddy, second the motion,,u da man.. #1

[rustyjunk]

hey thanks alot bro, this is exactly what i needed to know!