Harley Davidson HSR48 Twin Cams EFI Injection to Mikuni Conversion Kit

*This kit is recommended for big bore and hi flow heads. If your bike is closer to stock use the HSR42/45 kit we offer. 

This Mikuni Carburetor kit is for converting to a high performance carburetor, Harley Davidson Twin Cam models using the earlier Magneti Marelli or throttle cable operated Delphi injection systems.

The following kit components are included:

• Mikuni HSR Total Kit 48-2 for 1999 to present Harley Davidson Twin Cam 115cui and larger Bigtwin Models.
• For the maximum available increase in all round performance and power available, these kits are complete with everything needed for a total installation.
• Kits include a Mikuni HSR 48mm carburetor.
• upsized large plenum manifold with oversize (1.880” O.D.) spigots (matching rubbers need to be purchased elsewhere)
• rubber flange, 3″ wide maximum high flow K&N Filter, chrome cover, breather kit and mounting hardware.
• A new up-graded choke cable is provided and simply connect up your stock throttle cables. Both the air-cleaner element and manifold will deliver an additional performance improvement over the Screaming Eagle equivalents.

This specially designed manifold positions your carb and air-filter in as close to the motor as possible whilst enhancing maximum performance. There is a range of manifold lengths available depending on the engine size and configuration, please contact us for conformation.

Stainless steel Gas tank fittings and Hi-Flow Fuel Petcock. The gas tank adapter and plug sets differ between the early Magneti Marelli Tanks with an 18mm plug for blanking off the no longer required EFI return port and a 3/4″ x 16TPI thread on the petcock fitting. These are the ones pictured with the red washers (Loctite 567 Sealant required) and an inline fuel filter needs to be purchased separately along with your new fuel line of choice as the adapter inside diameter negates the space for a petcock screen. The same applies to the two Delphi options where the earlier tanks require a second 22mm plug and the later just the petcock adapter.

*If you have questions about what HSR kit you need or want to request one for your bike Contact us  and we will help you out.