Can a Harley Davidson 883 be bored out to 1200?

If your Sportster is an 883 and built before 2008, it can be bored out to 1200 using the existing cylinders and a set of 1200 conversion pistons. This will give you a 40% increase in power and cost around $450 DIY on top of the budget given above or $1,000 fitted.

How is an 883 Sportster similar to a 1200 Sportster?

Other aspects and parts of the engine are then tuned to match the modifications of to the bore, and the end result is an engine that is very similar to a 1200 Sportster with a matching performance increase.

What kind of engine do I need for a Harley Davidson Sportster?

Look for Rev Tech, Ultima, Cobra, Vance and Hines Fuel Pak and Power Commander. If your Sportster is an 883 and built before 2008, it can be bored out to 1200 using the existing cylinders and a set of 1200 conversion pistons. This will give you a 40% increase in power and cost around $450 DIY on top of the budget given above or $1,000 fitted.

What kind of cylinders does a zipper 883 use?

Zipper’s has developed 3-13/16” bore aluminum alloy cylinders for 883 and 1200 engines to increase the engine size to 88” with the stock stroke crankshaft. In compliance with ARB emissions laws, this product is not sold or shipped to California. Loading…

What’s the difference between 883 and 1200 Sportster engines?

It simply has larger bores; approximately 3.5 inches to the approximate 3 inch bore of the 883. Simply put, the 1200 Sportster engine has a bit more material and weighs slightly more than the 883 engine; the difference in weight is too small though to make a significant effect on performance.

When did the Buell Sportster Lightning heads come out?

96-03 LIGHTNING HEADS: This is a head that came out in 1996 on the Buell S1 Lightning model, as well as the 1200S Sportster Sport model. The 1200S version is black with polished fins and has dual plugs, the second plug being accessible through the hole in the top of the rocker box. The Buell S1 version is silver and has a single spark plug.

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.

Which is too short for the shallow 883 chamber?

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 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.

Is the 883 chamber shallower than the 1100 / 1200?

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.

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.

When did HD start using the big bore?

HD introduced big fins in 2004 when the cylinder pressure in 1200’s was raised dramatically. The larger fins were part of a coordinated plan to improve the cooling of the motor to handle the additional heat, along with oil squirters under the pistons and MAP based ignition.

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.

Can you modify a Harley Davidson Sportster engine?

A heavily modified Sportster. Waking up a Sportster is easy initially, as you just have to overcome the neutered state the EPA requires them to leave the factory in. So pipes and an air cleaner will give you an effective boost.

How are s and s lifters installed on a Harley Davidson?

However, on a stock Twin Cam motor, Harley always assembles lifters with all oil ports facing outward. We usually copy this assembly, just for what we consider to be good mechanical practice. Hold the S&S lifters into position with the alignment pin, then install the tappet covers with new gaskets.

What makes a Harley Davidson Sportster more powerful?

Skill Level – Moderate; you will need the manual and possibly some specialized tools, or the ability to make them. Simply put, camshafts change how deeply the engine breathes. Big breaths mean more air is burnt and that gives you more power; they also change when the bike breathes.

Navigation