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Yamaha XV750 by Kustom Special Components

The build of the Yamaha XV 750 Virago 1981 into a café racer, was undertaken by Daygo KSC. Daygo KSC (Kustom Special Components) is an Italian brand specializing in design and manufacture of motorcycle parts and the design and build of motorcycles based on customer request.

This project is a modern review of a classic motorcycle; built with a race spirit. From the base motorcycle super sport tyres and dampers were fitted.
Front yokes and rear damper attachment point were reviewed to improve the ground clearance and guarantee the full damper travel.

Seat and foot rest were redesigned in shape and position to replicate the seat position and rider weight distribution of a super sport bike.
While the original rear brakes were retained the front brake system is derived from competition, courtesy of Brembo Racing.

The engine was kept as original after a full rebuild. A K&N filter was installed and a fully handmade exhaust system was designed and fitted. The silencer is made of two stainless steel machine from solid ends and an outer aluminium cover.

The electronics were reviewed with a lighter and minimal loom with the main electronics located underneath the seat. Battery and regulator are located next to the engine underneath the rear swing arm pivot axle. The dash was converted into a full digital version.

Front light system is a bespoke design; the aim was to produce a tide line in lateral view and sink the projectors as much as possible into the front forks.
Rear light system is embedded into the seat.

The bike is ready to be road legal that is why it is presented with the rear number plate (installation arm is a bespoke design as well) and with the side stand installed.

The colours recall the classic Yamaha racing brand of the 1970-80’s; the red band is the main element. On the tank the side black band fades into white to keep the good mix between classic and modern. On the front fairing the right hand black stripe fades into green to recall the Italian flag colours.

Tech description and figures:

Bodywork

Tank	Derived from Kawasaki GPZ 1986
Front headlight fairing	Rapid prototype part with Plexiglas cover
Front Fender	Derived From Ducati Panigale
Rear Fender	Handmade (bespoke design)
Seat	Handmade (bespoke design)
Rear Number plate	Handmade (bespoke design)

Chassis

Frame	Original
Front suspension	Yamaha R1 2004 (43mm telescopic 120mm travel)
Front Yokes	Aluminium machined from solid (bespoke design)
Foot pegs and foot rests	Aluminium machined from solid (bespoke design)
Rear damper	Sachs modified to fit frame pick up point
Front Tyre/Rim	120/70 ZR17
Rear Tyre/Rim	150/90 R15

Braking System

Front Discs	2 x 300 mm (Brembo café)
Front Callipers	4 pistons (Brembo racing)
Front Brake master cylinder	19.00mm (Brembo Racing)
Rear Brakes	Original Drum brakes (reviewed pedal link)

Engine and power train

Main	As Original; fully rebuilt
Carter and covers	Aqua Blasted and fully polished
Exhaust line	Handmade (bespoke design)
Silencer	Stainless machine from solid ends; Ali central wrap

Electronics

ECU	As Original; located under the tank
Relays and fuse box	As original; located under seat
Loom	Reduced to minimum length with lightweight connectors
Battery	Antigravity 16 cells
Dash	Trail Tech Vapor System (fully digital)
Front Speed	Front system pick up point installed on brake disc bobbin
Rpm and temperatures	Shown on dash

Lightning System

Front	Double projector (bespoke design)
Rear	Embedded in the seat (bespoke design)

Source Daygo KSC - Author: M. Carriero