The Benelli 650Tornado Unknown: a bike that’s been two years in the making, with a engine so impressive it’s worth the wait. The parallel twin cylinder, four-stroke, OHV powerplant is a marvel of engineering, boasting two valves per cylinder and a ultra-short-stroke design that produces a unique riding experience.
The 650Tornado Unknown has had its fair share of teething problems, but Benelli has taken the criticism to heart and reworked the entire bike. Gone are the restrictive exhaust systems and handling issues of the past, replaced by a focus on quality and performance.
You can feel the quality in every detail, from the precision-machined fuel valves to the sleek lines of the bike’s pseudo-Rickman frame. The Benelli 650Tornado Unknown is a machine that rewards close attention to its many clever features, and it’s clear that this bike has been crafted with care and dedication.
As you ride the 650Tornado Unknown, you’ll discover an engine that’s both exhilarating and forgiving, eager to rev up to high speeds but also willing to cruise along at a leisurely pace. The unique character of this parallel twin cylinder powerplant is unmistakable – it’s a bike that will leave you grinning from ear to ear as you carve through twisty roads or devour long straights with ease. The Benelli 650Tornado Unknown: a true riding treasure, and one that will leave an indelible mark on your heart.
Key Specifications
Engine Type
Parallel twin cylinders, four stroke, OHV, 2 valves per cylinder
Engine Capacity
642.8 cc / 39.2 cu in
Max Power
38.8 kw / 52 hp
Fuel Tank Capacity
17 L / 4.5 US gal
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
Benelli650Tornado Unknown
Year
1971-72
Engine
Engine Type
Parallel twin cylinders, four stroke, OHV, 2 valves per cylinder
Displacement
642.8 cc / 39.2 cu in
Bore x Stroke
84 x 58 mm
Compression Ratio
8.0:1
Max Horsepower
38.8 kw / 52 hp
Engine Management System
2 x Dell’Orto VHB 29 carbs
Cooling System
Air cooled
Performance
Top Speed
n/a
*n/a – information not provided by manufacturer
Transmission
Gearbox
5 Speed
Final Drive
Chain
Electrical & Electronics System
Starter
Kick start
Chassis & Suspension
Front Suspension
Marzocchi tele-hydraulic forks
Rear Suspension
Swinging arm, adjustable shocks
Wheels & Brakes
Front Tire Size
3.50 -18
Rear Tire Size
4.00 -18
Front Brakes
Drum, twin leading shoe
Rear Brakes
Drum
Dimension & Weights
Fuel Tank Capacity
17 L / 4.5 US gal
Dry Weight
210 kg / 463 lbs
Features
Parallel twin cylinders
Four stroke engine
OHV (Overhead Valve) design
2 valves per cylinder
Ultra-short-stroke engine
Pseudo-Rickman frame
Precise fuel valves with swivel nut and nylon compression washer
Chrome-plated sleeve nuts on fuel valve body
Neoprene O-rings for sealing
Transparent sediment bowl for carb supply banjo
Dual 29mm VBH Dell’Orto carbs
Richening device in each carb for cold engine starts
Separate air supply for richening system
Accurate metering of richening system
One-piece kickstarter forging
Kickstarter pivot point near shaft
Wide face of kickstarter boss forms shield
Ignition key located on right side panel under seat
Know someone who’d find this useful? Share this page with a friend, your riding club or your favourite motorcycle community.
Explore our collection of Benelli motorcycles for detailed specifications and model information. Or browse all motorcycle manufacturers.
*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
