Tag Archives: V-twin

Harley unleashes 131 Screamin’ cubes

Harley-Davidson’s Screamin’ Eagles factory customs department has unleashed its biggest engine yet, the 131-cube (2147cc) crate motor.

The Screamin’ Eagle Milwaukee Eight 131 Crate Engine features the same 114mm (4.5”) stroke as the 114 Milwaukee Eight, but has been bored out from 101mm (4”) to 109mm (4.31”).

Harley claims it makes 90kW (121hp) of power and 177Nm (131ft-lb) of torque when matched to the Screamin’ Eagle Street Cannon mufflers. It also requires an ECM calibration and Screamin’ Eagle Pro Street Tuner.

That’s a lot of grunt, but still not comparable to the Triumph Rocket 3 which last year went from 2.3 litres to 2.5 litres with 123kW (165hp) at 6000rpm, up 11% over the previous model, and 220Nm (163ft/lb) of peak torque at 4000rpm.

That makes the Trumpy the biggest torque monster of any production bike in the world.

2019 Triumph Rocket 3 TFC torque monster2019 Triumph Rocket 3 TFC

Price and availability

The 131-cube monster, as well as the recently introduced Screamin’ Eagle Milwaukee-Eight 107″/ 114″ and 128″/131” Stage IV Kits, are not in the Aussie 2020 HD catalogue.

However, Harley-Davidson Australia spokesman Keith Waddell says they are “very excited to have these performance parts in ANZ and will provide an update when these parts are available for sale”.

We believe the parts are being homologated.

In the US, the price is $US6195 ($A9000) for the 131 oil-cooled version and $US6395 ($A9360) for the twin-cooled motor.

You could expect to pay around $A10,000 for the Screamin’ Eagle 131 crate motor, given a CVO 117 motor costs about $A7400.

Harley-Davidson CVO Street Glide Limited Road Glide Boom Box rain wet infotainment audio technoCVO Street Glide Limited wth 117 plant

Screamin’ Eagle 131

Harley’s Screamin’ Eagle Milwaukee Eight 131 Crate Engine bolts straight into 2017 and later Touring models running an oil-cooled or twin-cooled Milwaukee Eight engine.

With a compression ratio of 10:7:1, you will have to be careful on downshifts not to lock the rear wheel.

You will also be paying more to fuel up with high-flow fuel injectors that guzzle fuel at a rate of 5.5-grams a second.

There are bigger accessory motors available for Harley’s and other big twins, but Harley-Davidson Product Manager James Crean says their engine’s raw grunt is matched by factory-made reliability and a 12-month or 24-month factory limited warranty.

It comes in black/chrome or black/gloss black with 131 Stage IV badging on the cylinder heads and timer cover.

Source: MotorbikeWriter.com

Royal Enfield develops 834cc V-twin engine

Royal Enfield has only just unveiled their 650cc parallel-twin-engined Interceptor and Continental GT, but are already developing a bigger 834cc V-twin.

The Indian company unveiled the engine in a Bobber prototype soft-tail called the Concept KX to pay homage to their 1938 1140cc V-twin.

1938 Royal Enfield KX 1140 834cc
1938 Royal Enfield KX 1140

Interestingly it’s 834cc, but there is 838 stamped on the engine in their official video.Royal Enfield KX Concept bobber 834cc

While Royal Enfield says the KX will not go into production any time soon, it could be the start of a whole new line of cruiser models with the traditional cruiser-oriented V-twin format.

While the Bobber is designed along the lines of their 1938 model and has old-style girder fork, it has modern tech such as twin ByBre (cheaper Brembo version) brake discs, LED headlight, all-digital circular instrument pod (like the Ducati Scrambler) and an airbox that is part of the frame. Sounds as innovative as something Erik Buel would think up!

No more details on the bike are available, but it does look a lot like the very poplar Indian Scout right down to the dual right-right-side pipes and brown solo seat.

The new 834cc V-twin engine was probably developed in Leicestershire, England, were the Indian-owned company has built a research, design and development “technology centre”.

Enfield of India began assembling Bullet motorcycles under licence from the British company in 1956 and complete bikes by 1962.

The British company went bust in 1971 and Enfield of India was bought by heavy vehicle and bus maker Eicher in 1995.

Royal Enfield is now the oldest motorcycle brand in the world still in production while the Bullet model is the longest motorcycle production run of all time.

We will be very interested to see what other engines and bikes will come from the new UK tech centre!

The 650cc models certainly could do with a scrambler, street tracker and bobber.

Source: MotorbikeWriter.com
https://motorbikewriter.com/royal-enfield-develops-834cc-v-twin-engine/