Can you use 883 heads on a 1200 bore?
One of the big advantages to using 883 heads on a 1200 or 1250 conversion, as opposed to the 88-03 1200 heads, is that when you put the 883 chamber over a 3.498″ diameter bore, you gain a 1/4″ squish band around the perimeter of the chamber.
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.
How big are the valves on a Harley twin?
As such, they can be opened up to accommodate the larger 1.715″/1.480″ valve sizes. Standard 1100/1200 valves are too short for the shallow 883 chambers, however, “conversion” valves are readily available that have the larger diameter heads and the longer 883 lengths.
What kind of head does a Harley twin use?
Like the 883 heads of the same year, this design provided a squish band over the stock flat top piston. 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 should the cylinder heads be on a Harley Davidson?
A good 5 angle valve job is performed, and the heads are ready to go on the bike. Heads reworked in this manner should see increased air flow over stock heads of 10-15%. That should be more than enough to create a 90 HP engine with the proper pistons, carburetor, camshaft, exhaust system and ignition system.
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.
What kind of cylinder heads does Summit Racing use?
Brand VEGE Remanufactured Engines (871) Brodix Cylinder Heads (722) Dart (445) Profiler Performance Products (338) Edelbrock (267) Airflow Research (AFR) (263) Trick Flow Specialties (245) PROMAXX Performance (172) Mopar Replacement (132) Speedmaster (128) Chevrolet Performance (90) World Products (70) + Show All.
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.