When did the Evolution Sportster get a new transmission?
For 1991, the Evolution Sportster got a new 5-speed transmission. HD also made changes to the valvetrain and crankcase breathing that affected the cylinder heads. The cams were relocated to sit directly under the lifters (4 speeds had them slightly offset) and the holes in the head where the pushrods pass through were moved to match.
Which is the best factory head for a Sportster?
These are ultra-rare Sportster heads and they were the best factory head ever made for a Sportster until the Thunderstorm head came out in 1998. They have very large valves and a pear-shaped chamber with flat squish bands on each side.
What’s the difference between 88-90 and 91-03 1200 heads?
There are no significant differences between an 88-90 and a 91-03 1200 head other than the pushrod hole locations and the crankcase breather provisions as described above. This is one of the most common Sportster heads you’ll come across, as it came on every 1200 Sportster from 1991 through 2003, except the 98-03 XL1200S model.
Is the 883 chamber shallower than the 1100 / 1200?
For 1986, this chamber was a bathtub shape, providing squish bands on both sides. The 883 chamber is also shallower than the 1100/1200 chamber and the valves are longer to match. Because of this, when using any 883 head you must keep in mind that the valves are starting out closer to the piston and closer to each other.
What kind of bike is a 2004 Sportster?
2004 Harley-Davidson Sportster 1200 Custom, This 2004 Sportster 1200 Custom comes with a few upgrades, including a loud set of Harley-Davidson Screami… 2004 Harley-Davidson® XL1200C – Sportster® Custom 1200, California’s pre-owned Harley Mega-Store with over 200 Pre-Owned Harley-Davidsons in stock!!…
What kind of head does a 1200 Sportster use?
This is one of the most common Sportster heads you’ll come across, as it came on every 1200 Sportster from 1991 through 2003, except the 98-03 XL1200S model. Unfortunately, for performance applications it’s not a particularly good head, as the ports are turbulent and the chamber is not, which is just exactly the opposite of what you want.
How many miles does a Harley Davidson Sportster have?
This 2004 Sportster Custom is a like new machine, one owner and garage kept with only 4575 miles. Only one Sturgis trip in the life of this motorcycle… 2004 Harley-Davidson® XL1200C – Sportster® Custom 1200, 2004 Harley-Davidson® Sportster® Custom 1200
When did the Evolution Sportster head come out?
The Evolution Sportster was introduced in the 1986 model year in both 883cc and 1100cc configurations. The difference between these displacements was the bore size: an 883 has a 3″ bore and an 1100 has a 3.35″ bore. Both share a common 3.8125″ stroke.