Can you make a 1200 Sportster faster?
A Sportster 1200 is equipped with a 29-tooth drive pulley that pulls the drive belt to turn the rear wheel’s driven pulley. Replacing the drive pulley with a 27-tooth pulley from an 883 Sportster will dramatically increase acceleration, but it will make the engine work harder and reduce comfort while at highway speed.
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.
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.
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.
When was the 1100 engine punched out to 1200cc?
In 1988, the 1100 was punched out to 1200cc by virtue of a 3.498″ bore. The cylinder heads you’ll find on 1986-1990 models are: 49.5cc chamber, 1.585″ diameter intake valves, 1.350″ diameter exhaust valves
What kind of speedometer does a Harley Davidson Sportster use?
This article applies to Harley Davidson Sportster models (1973-1994). The speedometer arrangement on 1994 and older Harley Davidson Sportster models use a traditional cable operated drive system to display vehicle speed.
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.
What happens to the clutch on a Harley Davidson Sportster?
This article applies to the Harley Davidson Sportster (1986-2016). When you pull on the clutch lever, a cable is moved that’s connected to the clutch pack assembly beneath the primary cover. The clutch diaphragm springs tension is removed, taking away the friction that holds the clutch disks together.
What are the strong points of the 2003 Sportster?
I might add what, in my opinion, are the strong points of the 2003 and earlier models. Two very important things come to mind: 1.The earlier solid mount models were a lot lighter in weight. When they redesigned the frame in 2004 to change to the rubber mounted engines, they added as much as 75 pounds.