The Harley-Davidson XG750R is a competition-only motorcycle made by Harley-Davidson for flat track racing.[1] It is powered by the fuel-injected, liquid-cooled Revolution X V-twin engine from the 2015 Harley-Davidson Street 750. It is the first all-new flat track racing motorcycle from Harley-Davidson in 44 years.[2]

## Competition

It was first used in competition by Davis Fisher of the Harley-Davidson Screamin' Eagle Factory Team on April 9, 2016 in the GNC1 race at the AMA Pro Flat Track Circuit of the Americas Half-Mile.[3] The motorcycle was built by Vance & Hines, long known in motorcycle racing for their road racing and drag racing success.[4]

## Differences between the XR750 and XG750

The XG has a number of changes from the older XR750, reflecting newer technology.[5]

XR750 and XG750R differences  Attribute  | XR750  | XG750R

|
|

Engine layout  | 45-degree V-twin | 60-degree V-twin
Cooling  | Air | Liquid
Fuel delivery  | Carburetion | Injection
Valves per cylinder  | 2 | 4
Valve actuation  | Pushrod | Single overhead camshaft
Crankshaft bearings  | Roller | Plain
Connecting Rods  | Fork and Blade | Conventional
Rev Limiter  | No | Yes

## References

1. ↑ "Next Generation, Liquid-Cooled Harley-Davidson XG750R Flat Track Bike Breaks Cover at AMA Pro Springfield Mile". http://www.harley-davidson.com/content/h-d/en_US/home/events/press-release/road/2016/next-generation-liquid-cooled-harley-davidson-xg750r-flat-track-bike-breaks-cover-at-ama-pro-springfield-mile.html.
2. ↑ "Harley-Davidson introduces its first new pro flat-track bike in 44 years". 27 May 2016. http://www.digitaltrends.com/cars/harley-davidson-xg750r-flat-track-bike/#:JSZbdQMRjbrLhA.
3. ↑ "Harley-Davidson’s XG750R Breaks Cover At the Springfield Mile". http://www.motorcyclistonline.com/harley-davidsons-xg750r-breaks-cover-at-springfield-mile.
4. ↑ "Harley-Davidson Unveils XG750R Flat Tracker". http://www.motorcyclecruiser.com/harley-davidson-unveils-xg750r-flat-tracker#page-3.
5. ↑ "EXCLUSIVE FIRST LOOK: Harley-Davidson’s New XG750R Flat-Track Racer". http://www.cycleworld.com/harley-davidson-xg-750r-flat-track-racer-motorcycle-review-exclusive-first-look#page-5.

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