Harley Davidson Xr 750 Engine

The XR went on to dominate American flat track racing - and still does today.

Harley davidson xr 750 engine. The AMA approved the Harley-Davidson XR-750 an updated version of the XR for Class C competition on April 12 1972. The new motor produced 73 hp straight from the drawing board and revved to 8200 rpm with comfort. First year of the alloy head XR Raced throughout California in the 1970s and 1980s Delivered in as-raced unrestored condition This 1972 alloy XR-750 was purchased by Mike Boyes from renowned Harley tuner Michigander Tex Peel.

In fact its the winningest production racebike in history. And wed lament that it was never street legal. Also these special frames and XR-750 engines are not built to withstand many miles when ridden on pavement.

Johnny won the Hagerstown Half-mile nati. If you must have a Harley XR-750 looking street tracker and plan to ride any measurable distance on the street buy a 83-84 XR-1000 and modify the body work to look like a XR-750. This period was when Harleys XR-750 became the OffyCosworthHemi of motorcycle racing.

If you are a moderator please see our troubleshooting guide. Some time after is when the AMA introduced a new GN class called Supertractors oops I meant Supertrackers. CC by 20 Wiki Commons HD XR750 Performance.

The twin-cylinder 748 cc engines develop white-knuckle torque that continually proved successful on oval dirt tracks. Photo courtesy Todd Horner from Lethbridge Canada. The AMA Grand National Championship Class C rules which governed flat track racing for countless decades carefully stipulated that flathead and side-valve engines could have a swept capacity of up to 750cc whereas overhead valve and overhead cam engines were limited to 500cc.

Harley-Davidson XR 750 motorcycles remain one of the most popular bikes in racing history. Read the riders comments at the bikes discussion groupAnd check out the bikes reliability repair costs etc. This was the XR-1000 and it was a blending of XR-750 and Harley-Davidson XLX Sportster parts to create a practical road bike with some of the XR-750s character.