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1974 Ironhead Dual Carb Cafe Racer

Erik from Gennep, the Netherlands, sent us these pictures of the Harley-Norton racing bike that he is building. Erik's idea is to build a cafe racer with a Norton Manx look and a Harley Sportster Ironhead Engine. He calls her his "Harton".

While Erik did compete in classic bike races in Belgium, he is building this bike to use on the street rather than to race on a circuit. This is his idea about how a true Cafe Racer should look like.

Meet Erik's Ironhead "Barhopper"

Photo of racing bike with upgraded IronHead engine in Norton frame by Erik.

The frame is a Norton wideline featherbed, combined with a Roadholder front fork. That impressive front brake is a CMA "Dresda" 270mm 8-leading shoe, BSA/Triumph conical hub at the rear, and the bike has got Borrani rims.

Ancillary stuff like the gas tank, oil tank, seat, brake and shift gear, etc. are being built by Erik himself. As you can see, lots of things are still unfinished, but Erik hopes to complete his "barhopper" by the end of 2008.


Photo of racing bike with upgraded IronHead engine in Norton frame by Erik.

To improve performance, Erik completely restored the Ironhead motor and in the process he made a couple of modifications. First of all, he reversed the rear cylinder head of the Ironhead V-twin below the rocker cover to enable feeding of the rear cylinder by a separate second carburator. Since thereby the position of the inlet and the outlet valves has reversed, the inlet and outlet camshafts (P-cams) had to be adjusted as well.

Erik closed the tranny housing to make the primary dry so he could install a drive belt. This also involved design and fabrication of a custom clutch control system.

Other Ironhead engine modifications include dual sparkplugs, Crane single fire ignition, KB pistons, Kibblewhite Black Diamond valves, Dell'Orto carburators and K&N filters. Erik also removed the electric starter. Right now this Ironhead is kick start only.


Photo of racing bike with upgraded IronHead engine in Norton frame by Erik.


Photo of racing bike with upgraded IronHead engine in Norton frame by Erik.


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