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1997 ex-Borja Elf SwissAuto V4 two-stroke Racer

With Phil Aynsley


1997 ex-Borja Elf Swiss Auto V4 two-stroke Racer
1997 ex-Borja Elf SwissAuto V4 two-stroke Racer

Has there ever been a bike that has raced under so many names? The ELF Swissauto project was first shown in late 1995. The 108º V4 2-stroke featured a three bearing crankshaft and produced 180/185hp in original form and 192hp at 12,500rpm by 1997.

The Elf racer was campaigned under many different names
The Elf racer was campaigned under many different names

The motor weighed in at 37kg with the dual radiator cooling system using a belt-driven water pump. Both ‘screamer’ and ‘big bang’ layouts were used, with a balance shaft being employed in both versions by the end of ’96.

The engine weighs in at 37kg and features a dual radiator system
The engine weighs in at 37kg and features a dual radiator system

The ROC frame enabled multiple engine positions, thereby providing for changes of the centre of gravity. Weight without fuel was 129kg, while top speed was 310km/h.

The ROC frame also offers adjustable engine position
The ROC frame also offers adjustable engine position

Adrian Bosshard and Juan Borja were the team riders for 1996 (although Chris Walker and Marty Craggill also had rides), with Borja scoring eighth in the British GP and finishing 14th in the championship.

Borja scored eighth in the British GP and finished 14th in the championship
Borja scored eighth in the British GP and finished 14th in the championship

For 1997 Borja was joined by Jürgen Fuchs who scored the team’s best result of the year, a sixth place, at Rio.

Stripped down view of the Elf V4 Racer
Stripped down view of the Elf V4 Racer

ELF finished their sponsorship at the end of ’97 with the bike then being known as the MuZ for ’98 and then the Muz Weber in ’99.

Elf finished their sponsorship in 1997, with the bike a Muz in 1998
Elf finished their sponsorship in 1997, with the bike a Muz in 1998

While the ’98 season wasn’t particularly successful, the ’99 season saw six top ten placings, two pole positions and two lap records. The main riders were Jurgen van den Goorbergh and Luca Cadalora.

The 1999 season saw six top ten placings, two pole positions and two lap records, proving the most successful
The 1999 season saw six top ten placings, two pole positions and two lap records, proving the most successful

While the Muz team didn’t compete past 1999, the bikes themselves were raced again under the Pulse banner in 2001. However not having had any development since ’99 they were not competitive and the underfunded team folded before the season was through.

Elf V4 Racer instrumentation
Elf V4 Racer instrumentation

The bike I photographed is an 1997 ex-Borja machine.

View from the front of the instrumentation, master cylinder and steering damper
View from the front of the instrumentation, master cylinder and steering damper

Above view of the V4 Racer frame
Above view of the ELF V4 Racer frame

Elf V4 Racer rear shock and remote reservoir
Elf V4 Racer rear shock and remote reservoir

Elf V4 Racer expansion chambers
Elf V4 Racer -Millet Racing (France) expansion chambers

Elf V4 Racer mufflers
Elf V4 Racer mufflers

Closer look at the ROC frame
Closer look at the ROC frame

Side view of the dry clutch
Side view of the dry clutch

Elf V4 Racer carbies
Elf V4 Racer carbies

The ELF SwissAuto V4 Project
The ELF SwissAuto V4 Project

The ELF SwissAuto V4 Project
The ELF SwissAuto V4 Project

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