New British 'GP-inspired' 750 triple revealed

TWO new mystery British sports bikes are due to debut tonight - and they sound good.  

Called the GP-Sport and GP-Street, from Spirit Motorcycles, they're 750cc triples with a GP-inspired 'fully-adjustable' chassis, said to be a first from a British manufacturer. 

Little else is confirmed about them at this stage except that they have carbon-fibre bodywork and some clever-sounding electronics. 

Here's what the firm said in a brief message: 'These exciting new road & track bikes feature a first from a British manufacturer - a Grand Prix-inspired fully adjustable chassis, from headstock to swingarm.  Coupled to a tuned 750cc 3-cylinder engine, lightweight carbon fibre monocoque bodywork, top quality equipment & running gear and cutting edge, F1-style electronics, these bikes will redefine the phrase British Performance Motorcycle.'

The message came in an invitation to the unveiling of the bikes at trendy motorcycle café The Bike Shed in Shoreditch, London, after 6pm tonight. 

We'll update this story with pictures and more details as soon as we have them. For now, we thought we'd give this teaser of our own. 

Update: there are to be four versions in total, the GP-Sport and GP-Street and higher spec GP-Sport R and GP-Street R, featuring a 'tuned and blueprinted' 749cc in-line triple. 

The R versions will make a claimed 180bhp while the two base models make 156bhp. 

Claimed wet weight is 145kg for the R versions and 150kg for the base verions. 

The chassis is brazed chrome-moly steel with aluminium inserts and a fully adjustable headstock.

Suspension is provided by K-Tech KTR forks and a K-Tech DDS four-way adjustable shock.

The GP-Sport and GP-Street will start from £44,999, the GP-Sport R £64,999 and the GP-Street R £69,999. 

The faired GP-Sport and naked G-Street have been unveiled at The Bike Shed while the R versions are on the way in limited numbers.

The bikes are a collaboration between custom builders Spirit of the Seventies and Tony Scott of tuning firm T3 Racing, 

Tony Scott, MD at Spirit Motorcycles said: “We’re very excited to be launching our first two new models to the market. Both the GP-Street and GP-Sport have been built using our unrivalled technical know-how and engineered to the very highest standards, whilst maintaining an exquisite and luxurious design. Our limited production run also means Spirit Motorcycles guarantees exclusivity, making the machines the perfect choice for any discerning motorcycle fan."

Spirit's full specs for all versions are below.

Here are the first pictures, straight from the presentation.

The GP-Street

GP-Sport R specs

Body Work Pre-Preg Carbon Fibre with Paintwork to your own design.

Engine Four stroke • in-line 3-cylinder • DOHC • 4 valve per cylinder • Blue Print

Capacity 749cc

Bore x Stroke 76 x 55 mm

Cooling System Liquid-cooled • Samco Hose Kit

Compression Ratio 13.8:1

Lubrication Wet sump

Oil Capacity 3.6 Litres

Induction Multipoint sequential electronic fuel injection with forced air induction

Exhaust Titanium full system 3 into 1 straight through system • 102 DBA Baffled • 105 DBA Open • T3 Inconel (Lobster) Exhaust Can

Ignition M130 ECU & Four Part Kit Harness with Military Connectors.

Starting Electric

Max Power 180 Bhp @ 14200 rpm (Rear Wheel Figures)

Clutch Wet multi-plate • Bosch Electronically controlled Slipper Clutch

Transmission 6 Speed Electronic shift

Final Drive 428 X Ring Chain with complete Road/Race sprocket set • 3 x Front & 5 x Rear

Frame Steel Alloy Tubular Frame • Aero Section Headstock • CNC Billet Frame Foots • Brazed Hand Welded Joints • Variable tube diameter and thickness to effect torsion/lateral and longitudinal forces and moments • Adjustable Headstock for offset/rake & trail • Adjustable Swingarm pivot up & down • Adjustable link arm for ride height & rising rate.

Front Suspension Specification: K-Tech KTR 2 • Fork Length 730mm. • Stroke 130mm. • Open 25mm Cartridge Aluminium Damping System (Hard Anodised). • Upper Tube Material 7075-T6 Material. • Slide Pipe DLC coated and super finished. • CNC 7075 axle brackets for maximum strength. • 18mm spring preload. • 24 clicks of compression adjustment. • 30 clicks of rebound adjustment.

Rear Suspension Specification: K Tech 35DDS Pro CNC machined billet aluminium body and internals • Independent circuits for rebound and compression damping • Each circuit has 32 clicks of adjustment • Ride Height adjustment • Hydraulic Pre-load Adjuster • BPV adjuster allows oil to flow freely between the two circuits (compression and rebound) at very low velocities.

Front Brakes 2 x 320 mm Narrow Track PFM Discs • PFM 6 pot Billet alloy calipers. Adjustable Ratio Master Cylinder

Rear Brake Single 220mm lightweight disc with PFM Light weight 2 piston calliper 640Grams - Thumb operated or lever

Brake Lines HEL Dry brake connectors

Front Tyre 120/70 ZR 17

Rear Tyre 180/55 ZR 17

Front Wheel Dymag Carbon Fibre & Extruded Aluminium - 17 x 3.50 - 5 Spoke - Ceramic Hybrid NTN Bearings Rear Wheel Dymag Carbon Fibre & Extruded Aluminium - 17 x 5.50 - 5 Spoke - Ceramic Hybrid NTN Bearings Rake Adjustable

Trail Adjustable

Wheelbase Adjustable

Seat Height Adjustable Wet Weight 145KG

Fuel Capacity 15 L

Lighting Multiple Led Units • Dipped & Main Beam • LED Strip Brake & Tail • Number plate illumination • LED Strip Indicators

Instrument & Electronics Motec M130 Programmable ECU with four part Kit Harness Full colour display, logger and controller all-in-one eliminates the need for separate devices (I/O and logging optional) Numerous selectable layouts supplied, including an RPM sweep, RPM dial and a multi-value style ideal for the dyno or warm up Each is available in four colour variations (red, green, blue, white) Configurable channels, measurement units and warnings 48 user-defined alarms, for example Low Oil Pressure, Low Fuel, Fastest Lap Programmable overrides - particularly useful for showing values such as lap times All layouts include a multi-purpose, zero-centred bar graph primarily for Lap Gain/Loss but can be configured for other purposes such as Fuel Level, G-Force (Lat or Long) and Steering Angle Can be turned on or off Three programmable 'pages' enable users to tailor layouts for different scenarios, Road, Race, Set-up Ensures only the most relevant information is displayed at any given time Includes a built-in array of 10 programmable, multi-coloured LEDs for shift lights and other driver alerts Impressive 125mm full colour LCD screen (approx 5") - ultra bright, high resolution and anti-reflective for easy viewing, even in direct sunlight Configurable channels and labels allow comprehensive customisation within the supplied layouts. Logging and Analysis Optional 120 MB internal data logging - can be enabled at the time of purchase or later using a convenient password activation Fast download via Ethernet Accommodates over 300 channels derived from a mixture of analogue and digital inputs, RS232 and CAN data channels (optional I/O upgrade required for analogue and digital inputs) Includes i2 Standard data analysis software (i2 Pro available as an upgrade) Updates, suspension, performance, and data analysis available remotely via 4g modem and network.

Electronics All Engine Parameter Sensors - Adjustable Traction Control - Adjustable Anti Wheelie - Adjustable Electronic Slipper Clutch - TPMS - Front & Rear Wheel Speeds - Suspension Travel & Speeds - Throttle Position - Brake Pressure - Fuel Pressure Lambda Fuel/Air Monitoring. Remote GPS Monitoring for Anti-Theft. All Parameters are adjustable using Remote Wi-Fi Connection or 4G connection via installed unit.

Top Speed Adjustable

Price £64,999.00

Optional Extras

Bespoke Paintwork & Design £1,500.00

Track Pack

GPS & Potentiometers £720.00

Anti-Wheelie £600.00

KTR 3 Forks £5,525.00

Brake Pressure Switch £300.00

Wheel Speed - Front & Rear £600.00

Air Box Pressure £300.00

Tyre Temperature Sensors £1,200.00

Double Front Brake Master Cylinder Assembly with Finger Operated Rear Brake £1,200.00

Additional Data Channels £360.00

All Prices exclusive of VAT Does Not include Fitting All data subject to change

GP-Sport specs 

Body Work: Pre-Preg Carbon Fibre.

Engine Four stroke • in-line 3-cylinder • DOHC • 4 valve per cylinder • Blue Print

Capacity 749cc

Bore x Stroke 76 x 55 mm

Cooling System Liquid-cooled • Samco Hose Kit

Compression Ratio 13.5:1

Lubrication Wet sump

Oil Capacity 3.6 Litres

Induction Multipoint sequential electronic fuel injection with forced air induction

Exhaust Titanium Steel 3 into1 straight through system • 102 DBA Baffled • 105 DBA Open • T3 Titanium (Lobster) Exhaust Can

Ignition Kit ECU with 15K Rev Limit and Modified Fuelling • Kit Wiring Harness

Starting Electric

Max Power 156+ Bhp @ 14200 rpm (Rear Wheel Figures)

Clutch Wet multi-plate • Mechanical Slipper Clutch

Transmission 6 Speed Electronic Shift

Final Drive 428 X Ring Chain with complete Road/Race sprocket set • 3 x Front & 5 x Rear

Frame Steel Alloy Tubular Frame • Aero Section Headstock • CNC Billet Frame Foots • Brazed Hand Welded Joints • Variable tube diameter and thickness to effect torsion/lateral and longitudinal forces and moments • Adjustable Headstock for offset/rake & trail • Adjustable Swingarm pivot up & down • Adjustable link arm for ride height & rising rate.

Swing Arm Cast Brushed Aluminium with Quick Release

Front Suspension Specification: K-Tech KTR 2 • Fork Length 730mm. • Stroke 130mm. • Open 25mm Cartridge Aluminium Damping System (Hard Anodised). • Upper Tube Material 7075-T6 Material. • Slide Pipe DLC coated and super finished. • CNC 7075 axle brackets for maximum strength. • 18mm spring preload. • 24 clicks of compression adjustment. • 30 clicks of rebound adjustment.

Rear Suspension Specification: K Tech 35DDS Pro CNC machined billet aluminium body and internals • Independent circuits for rebound and compression damping • Each circuit has 32 clicks of adjustment • Ride Height adjustment • Hydraulic Pre-load Adjuster • BPV adjuster allows oil to flow freely between the two circuits (compression and rebound) at very low velocities.

Front Brakes 2 x 320 mm Narrow Track PFM Discs • PFM 6 pot Billet alloy calipers. Adjustable Ratio Master Cylinder

Rear Brake Single 220mm lightweight disc with PFM Light weight 2 piston calliper 640Grams

Brake Lines HEL Dry brake connectors

Front Tyre 120/70 ZR 17

Rear Tyre 180/55 ZR 17

Front Wheel Dymag Forged Aluminium & Extruded Aluminium - 17 x 3.50 - 7 Spoke - Ceramic Hybrid NTN Bearings

Rear Wheel Dymag Forged Aluminium & Extruded Aluminium - 17 x 5.50 - 7 Spoke - Ceramic Hybrid NTN Bearings

Rake Adjustable

Trail Adjustable

Wheelbase Adjustable

Seat Height Adjustable

Wet Weight 150KG Wet weight

Fuel Capacity 15 L

Lighting Multiple LED Lamps • Dipped & Main Beam • LED Strip Brake & Tail • Number plate illumination • 4 x Strip LED Indicators

Instrument & Electronics Display 5” TFT Resolution 800x480 pixels Brightness 700cd/m2 - 1,100 Lumen Ambient light sensor Yes Alarm LEDs 6 RGB freely configurable Shift lights 10 integrated freely configurable RGB LEDs CAN connections 3 Expansion CAN connection GPS, Channel Expansion, Thermocouple Expansions, Lambda Controller. Smarty Cam port Analog inputs 8 fully configurable, max 1,000 Hz each Digital inputs 4 Speed inputs, lap signal, coil RPM input Digital outputs 2 (1 Amp max each) Accelerometer Internal Three-axial ± 5G + Three-axial Gyroscope Internal memory 4 GB Body Anodised Aluminium Connectors 2 Motorsport connectors Waterproof IP65

Top Speed Adjustable

Price £44,999.00

Optional Extras

Bespoke Paintwork & Design £1,500.00

Carbon Wheels £480.00

M2 Exhaust £800.00

Moto GP Switching Units £600.00

GPS & Pots £720.00

All Prices exclusive of VAT Does Not include Fitting All data subject to change

GP-Street R specs

Body Work Pre-Preg Carbon Fibre with Paintwork to your own design.

Engine Four stroke • in-line 3-cylinder • DOHC • 4 valve per cylinder • Blue Print

Capacity 749cc

Bore x Stroke 76 x 55 mm

Cooling System Liquid-cooled • Samco Hose Kit

Compression Ratio 13.8:1

Lubrication Wet sump

Oil Capacity 3.6 Litres

Induction Multipoint sequential electronic fuel injection with forced air induction

Exhaust Titanium full system 3 into 1 straight through system • 102 DBA Baffled • 105 DBA Open • T3 Inconel (Lobster) Exhaust Can

Ignition M130 ECU & Four Part Kit Harness with Military Connectors.

Starting Electric

Max Power 180 Bhp @ 14200 rpm (Rear Wheel Figures)

Clutch Wet multi-plate • Bosch Electronically controlled Slipper Clutch

Transmission 6 Speed with Slipper Clutch

Final Drive 428 X Ring Chain with complete Road/Race sprocket set • 3 x Front & 5 x Rear

Frame Steel Alloy Tubular Frame • Aero Section Headstock • CNC Billet Frame Foots • Brazed Hand Welded Joints • Variable tube diameter and thickness to effect torsion/lateral and longitudinal forces and moments • Adjustable Headstock for offset/rake & trail • Adjustable Swingarm pivot up & down • Adjustable link arm for ride height & rising rate.

Swing Arm Bespoke Factory Aluminium Swing Arm with Quick Release

Front Suspension Specification: K-Tech KTR 2 • Fork Length 730mm. • Stroke 130mm. • Open 25mm Cartridge Aluminium Damping System (Hard Anodised). • Upper Tube Material 7075-T6 Material. • Slide Pipe DLC coated and super finished. • CNC 7075 axle brackets for maximum strength. • 18mm spring preload. • 24 clicks of compression adjustment. • 30 clicks of rebound adjustment.

Rear Suspension Specification: K Tech 35DDS Pro CNC machined billet aluminium body and internals • Independent circuits for rebound and compression damping • Each circuit has 32 clicks of adjustment • Ride Height adjustment • Hydraulic Pre-load Adjuster • BPV adjuster allows oil to flow freely between the two circuits (compression and rebound) at very low velocities.

Front Brakes 2 x 290 mm Brembo HPK Discs • AP Lockheed 4 piston billet alloy calipers. Adjustable Ratio Master Cylinder

Rear Brake Single 220mm lightweight disc with PFM Light weight 2 piston calliper 640Grams - Thumb operated or lever

Brake Lines HEL Dry brake connectors

Front Tyre 120/70 ZR 17

Rear Tyre 180/55 ZR 17

Front Wheel Dymag Carbon Fibre & Extruded Aluminium - 17 x 3.50 - 5 Spoke - Ceramic Hybrid NTN Bearings

Rear Wheel Dymag Carbon Fibre & Extruded Aluminium - 17 x 5.50 - 5 Spoke - Ceramic Hybrid NTN Bearings

Rake Adjustable

Trail Adjustable

Wheelbase Adjustable

Seat Height Adjustable

Wet Weight 1445KG

Fuel Capacity 15 L

Lighting Twin Halo Projector lamps • Dipped & Main Beam • Brake & Tail • Number plate illumination • 4 x LED Indicators

Instrument & ECU Motec M130 Programmable ECU with four part Kit Harness Full colour display, logger and controller all-in-one eliminates the need for separate devices (I/O and logging optional) Numerous selectable layouts supplied, including an RPM sweep, RPM dial and a multi-value style ideal for the dyno or warm up Each is available in four colour variations (red, green, blue, white) Configurable channels, measurement units and warnings 48 user-defined alarms, for example Low Oil Pressure, Low Fuel, Fastest Lap Programmable overrides - particularly useful for showing values such as lap times All layouts include a multi-purpose, zero-centred bar graph primarily for Lap Gain/Loss but can be configured for other purposes such as Fuel Level, G-Force (Lat or Long) and Steering Angle Can be turned on or off Three programmable 'pages' enable users to tailor layouts for different scenarios, Road, Race, Set-up Ensures only the most relevant information is displayed at any given time Includes a built-in array of 10 programmable, multi-coloured LEDs for shift lights and other driver alerts Impressive 125mm full colour LCD screen (approx. 5") - ultra bright, high resolution and anti-reflective for easy viewing, even in direct sunlight Configurable channels and labels allow comprehensive customisation within the supplied layouts. Logging and Analysis Optional 120 MB internal data logging - can be enabled at the time of purchase or later using a convenient password activation Fast download via Ethernet Accommodates over 300 channels derived from a mixture of analogue and digital inputs, RS232 and CAN data channels (optional I/O upgrade required for analogue and digital inputs) Includes i2 Standard data analysis software (i2 Pro available as an upgrade) Updates, suspension, performance, and data analysis available remotely via 4g modem and network.

Electronics All Engine Parameter Sensors - Adjustable Traction Control (Inc as standard) - Adjustable Anti Wheelie - Adjustable Electronic Slipper Clutch - TPMS - Front & Rear Wheel Speeds - Suspension Travel & Speeds - Throttle Position - Brake Pressure - Fuel Pressure Lambda Fuel/Air Monitoring. Remote GPS Monitoring for Anti-Theft. All Parameters are adjustable using Remote Wi-Fi Connection or 4G connection via installed unit.

Top Speed Adjustable

Price £69,999.00 Inc VAT

Optional Extras

Additional Data Channels Circa £300.00 per channel.

Bespoke Paintwork & Design £1,500.00

Track Pack

GPS & Potentiometers £720.00

Anti-Wheelie £600.00

KTR 3 Forks £5,525.00

Brake Pressure Switch £300.00

Wheel Speed - Front & Rear £600.00

Air Box Pressure £300.00

Tyre Temperature Sensors £1,200.00

Double Front Brake Master Cylinder Assembly with Finger Operated Rear Brake £1,200.00

Additional Data Channels £360.00 All Prices exclusive of VAT

Does Not include Fitting All data subject to change

GP-Street specs

Body Work Pre-Preg Carbon Fibre.

Engine Four stroke • in-line 3-cylinder • DOHC • 4 valve per cylinder • Blue Print

Capacity 749cc

Bore x Stroke 76 x 55 mm

Cooling System Liquid-cooled • Samco Hose Kit

Compression Ratio 13.5:1

Lubrication Wet sump

Oil Capacity 3.6 Litres

Induction Multipoint sequential electronic fuel injection with forced air induction

Exhaust Titanium Steel 3 into1 straight through system • 102 DBA Baffled • 105 DBA Open • T3 Titanium (Lobster) Exhaust Can

Ignition Kit ECU with 15K Rev Limit and Modified Fuelling • Kit Wiring Harness

Starting Electric

Max Power 156+ Bhp @ 14200 rpm

Clutch Wet multi-plate • Mechanical Slipper Clutch

Transmission 6 Speed Electronic Shift

Final Drive 428 X Ring Chain with complete Road/Race sprocket set • 3 x Front & 5 x Rear

Frame Steel Alloy Tubular Frame • Aero Section Headstock • CNC Billet Frame Foots • Brazed Hand Welded Joints • Variable tube diameter and thickness to effect torsion/lateral and longitudinal forces and moments • Adjustable Headstock for offset/rake & trail • Adjustable Swingarm pivot up & down • Adjustable link arm for ride height & rising rate.

Swing Arm Cast Brushed Aluminium with Quick Release

Front Suspension Specification: K-Tech KTR 2 • Fork Length 730mm. • Stroke 130mm. • Open 25mm Cartridge Aluminium Damping System (Hard Anodised). • Upper Tube Material 7075-T6 Material. • Slide Pipe DLC coated and super finished. • CNC 7075 axle brackets for maximum strength. • 18mm spring preload. • 24 clicks of compression adjustment. • 30 clicks of rebound adjustment.

Rear Suspension Specification: K Tech 35DDS Pro CNC machined billet aluminium body and internals • Independent circuits for rebound and compression damping • Each circuit has 32 clicks of adjustment • Ride Height adjustment • Hydraulic Pre-load Adjuster • BPV adjuster allows oil to flow freely between the two circuits (compression and rebound) at very low velocities.

Front Brakes 2 x 320 mm Narrow Track PFM Discs • PFM 6 pot Billet alloy calipers. Adjustable Ratio Master Cylinder

Rear Brake Single 220mm lightweight disc with PFM Light weight 2 piston calliper 640Grams Brake Lines HEL Dry brake connectors Front Tyre 120/70 ZR 17 Rear Tyre 180/55 ZR 17

Front Wheel Dymag Forged Aluminium & Extruded Aluminium - 17 x 3.50 - 7 Spoke - Ceramic Hybrid NTN Bearings

Rear Wheel Dymag Forged Aluminium & Extruded Aluminium - 17 x 5.50 - 7 Spoke - Ceramic Hybrid NTN Bearings

Rake Adjustable

Trail Adjustable

Wheelbase Adjustable

Seat Height Adjustable

Wet Weight 150KG Wet weight

Fuel Capacity 15 L

Lighting Multiple LED Lamps • Dipped & Main Beam • LED Strip Brake & Tail • Number plate illumination • 4 x Strip LED Indicators

Instrument & Electronics Display 5” TFT Resolution 800x480 pixels Brightness 700cd/m2 - 1,100 Lumen Ambient light sensor Yes Alarm LEDs 6 RGB freely configurable Shift lights 10 integrated freely configurable RGB LEDs CAN connections 3 Expansion CAN connection GPS, Channel Expansion, Thermocouple Expansions, Lambda Controller. Smarty Cam port Analog inputs 8 fully configurable, max 1,000 Hz each Digital inputs 4 Speed inputs, lap signal, coil RPM input Digital outputs 2 (1 Amp max each) Accelerometer Internal Three-axial ± 5G + Three-axial Gyroscope Internal memory 4 GB Body Anodised Aluminium Connectors 2 Motorsport connectors Waterproof IP65

Top Speed Adjustable

Price £44,999.00 Inc VAT

Optional Extras

Bespoke Paintwork & Design £1,500.00

Carbon Wheels £480.00

M2 Exhaust £800.00

Moto GP Switching Units £600.00

GPS & Pots £720.00

All Prices exclusive of VAT Does Not include Fitting All data subject to change