What kind of heads does a Sportster 883r have?
Most sets of 883 heads you come across will be silver in color. 883R models have black 883 heads. All are easily identified by the “883” script cast into them adjacent to the chamber. 88-03 XLH1200 HEADS: These heads have a 67cc hemispherical chamber, i.e. it’s a round bowl with no squish band.
What kind of fasteners do Sportster heads use?
The rocker box and head breather arrangements are identical, as are the fin sizes. The front mount holes have the same spacing as the 91-03 Sportster heads but use 7/16 NC fasteners (exception: 95-96 S2 models which use a 3/8 fastener on one side and a 7/16 fastener on the other).
What kind of rocker box do I need for a Sportster?
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.
Which is the same generation of Sportster heads?
Buell Heads 95-02 Buell heads can be considered the same generation as 91-03 Sportster heads. The rocker box and head breather arrangements are identical, as are the fin sizes.
Most sets of 883 heads you come across will be silver in color. 883R models have black 883 heads. All are easily identified by the “883” script cast into them adjacent to the chamber. 88-03 XLH1200 HEADS: These heads have a 67cc hemispherical chamber, i.e. it’s a round bowl with no squish band.
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.
What kind of chamber does Sportster 88-03 XLH1200 head have?
88-03 XLH1200 HEADS: These heads have a 67cc hemispherical chamber, i.e. it’s a round bowl with no squish band. Hemi chambers provide maximum valve unshrouding but also tend to have poorer chamber turbulence.
The rocker box and head breather arrangements are identical, as are the fin sizes. The front mount holes have the same spacing as the 91-03 Sportster heads but use 7/16 NC fasteners (exception: 95-96 S2 models which use a 3/8 fastener on one side and a 7/16 fastener on the other).
What’s the compression ratio on a Sportster head?
The seats can accomodate the standard XLH1200 valve sizes (1.715 intake/1.480 exhaust) and special longer “conversion valves” are available to do this upgrade. When used in an 883 to 1200 conversion, reverse dome (dish) conversion pistons are available to give a workable compression ratio.
88-03 XLH1200 HEADS: These heads have a 67cc hemispherical chamber, i.e. it’s a round bowl with no squish band. Hemi chambers provide maximum valve unshrouding but also tend to have poorer chamber turbulence.
Why did I Turn my Back on a Sportster?
Height, weight and vibration were the three biggest things that turned me off to the Sportster after I had some serious riding experience on it. But hey, that’s just me. There are a ton of Sportster enthusiasts who will ride forever on their beloved Sportster (the cafe racer) forever.
The seats can accomodate the standard XLH1200 valve sizes (1.715 intake/1.480 exhaust) and special longer “conversion valves” are available to do this upgrade. When used in an 883 to 1200 conversion, reverse dome (dish) conversion pistons are available to give a workable compression ratio.
What’s the difference between 03-present and 04-present Sportster heads?
03-present Buell heads can be considered the same generation as 04-present Sportster heads in that they use large fins and 7/16 front mount fasteners with the right front mount hole moved inboard 1/4″. The main difference is that the XB head does not provide head breather/carb mount bolt holes.
Can a Harley 883 be bored out to 1200?
The absolute best bang for the buck is an 883 bored out to 1200 and sporting a set of ported heads. This conversion will yield more horsepower per dollar than anything else that can be done to any other Harley-Davidson. We use the same sized valves as used in the 1200 heads. A 1.715″ intake and a 1.480″ exhaust valve.
What are the cylinder heads on a 1986 evolution 883?
The cylinder heads you’ll find on 1986-1990 models are: 49.5cc chamber, 1.585″ diameter intake valves, 1.350″ diameter exhaust valves This design provided a squish band over the stock flat top piston, the only year that an Evolution 883 had a squish band. As a result the valves start out closer to the pistons and closer to each other.
Can you use 883 heads with 1200 valves?
With the 883 heads (used on 1200 motors) we can give you more flow, higher port velocity for more torque and a higher compression ratio for more horsepower. All 1200 owners should try use ported 883 heads for their performance upgrades. Please use the buttons at left to navigate through your options. 883 heads with 1200 valves.
The absolute best bang for the buck is an 883 bored out to 1200 and sporting a set of ported heads. This conversion will yield more horsepower per dollar than anything else that can be done to any other Harley-Davidson. We use the same sized valves as used in the 1200 heads. A 1.715″ intake and a 1.480″ exhaust valve.
The cylinder heads you’ll find on 1986-1990 models are: 49.5cc chamber, 1.585″ diameter intake valves, 1.350″ diameter exhaust valves This design provided a squish band over the stock flat top piston, the only year that an Evolution 883 had a squish band. As a result the valves start out closer to the pistons and closer to each other.
How big is the exhaust valve on an 883 head?
We use the same sized valves as used in the 1200 heads. A 1.715″ intake and a 1.480″ exhaust valve. With the port work done, these heads flow much more than a stock set of 1200 heads BUT that isn’t the only reason why they make so much power.