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An affordable route into competitive motorcycle racing
JHS Racing create bespoke, hand-built racing motorcycles that
equip you with a highly-competitive but affordable
foundation for participating in both club and
national-level road racing.
With our successful and distinguished record of competing at many levels, including the British Supersport series
and our record-breaking success at the Manx in 2011 (click here
for details), you can benefit from the race-proven knowledge and experience we bring to bear on every machine that we build.
Our most commonly-used platform for race bike development is Suzuki's SV650, providing
both a
beautifully balanced frame combined with a tough and enduring engine well-suited to a range of tuning modifications. We also have extensive experience with
race-preparing the Triumph Daytona 675.
Our racing motorcycles are supplied fully regulation-compliant and ready to race. Typical specifications of our built-to-order
racing machines are listed below:
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Supertwins SV650-based racing motorcycles: |
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(Click on a picture for extra-large
image) |
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Our Supertwins machines (eligible for Irish racing series, Manx & TT) are offered in two base specification levels: Clubman and Expert.
Based upon a low-mileage, fuel-injected donor machine which is stripped and rebuilt to the following specifications:
Clubman spec:
USD Suzuki front end with
radial brakes | Elka 3-way
adjustable rear shock | New
Pirelli tyres | Hel brake
lines | SES adjustable rear
sets | SES clip-ons | AFAM
sprockets and 520 race chain
| Full M4 race exhaust
system alloy can (upgrade to
titanium is an option) |
Lightweight fairing bracket
| Lightweight sub frame |
Lightweight battery box |
Smaller light-weight,
high-output battery | Power
commander (with custom map)
quick shifter | JHS race
bodywork with Dzus fasteners
(painting is extra ) | JHS
race seat pad | JHS race
screen | New brake pads |
Race loom | Ram air system,
large throttle bodies.
Engine stripped and inspected; bearings and gaskets replaced as required
Rebuilt with JHS-spec con rods (essential for racing)
JHS forged high-compression piston kit (normal spec is 13.1 cr)
JHS gas-flowed heads
JHS spec race cam kit
These modified engines produce 82bhp
PLUS.
Further options are available
at additional cost (please
call to discuss).
£ P.O.A
Expert spec:
Öhlins usb front end with
Brembo radial brakes | Öhlins
rear shock | New Pirelli
tyres | Hel brake lines |
SES adjustable rear sets |
SES clip-ons | Race loom |
AFAM sprockets and 520 race
chain | Full M4 race exhaust
system alloy can (the can
may be changed once final
machine is built) |
Lightweight fairing bracket
| Lightweight sub frame |
Lightweight battery box |
Smaller lightweight,
high-output battery | Power
commander (with custom map)
| Quickshifter (possible
Bazzaz system) | JHS race
bodywork with Dzus fasteners
| JHS race seat pad | JHS
race screen | New brake pads
| Ram air system, very large
throttle bodies | Painting in
base colour.
Engine stripped and inspected; bearings and gaskets replaced as required
Rebuilt with JHS-spec
con rods & billet crankshaft
JHS forged high-compression piston kit (normal spec is 13.1 cr)
JHS gas-flowed heads
JHS spec race cam kit
JHS valves
& valve spring kit
JHS adjustable cam sprockets
Sigma slipper clutch with Barnett clutch kit
This engine specification will reliably produce 90bhp PLUS under racing conditions.
£ P.O.A
Read about
Dave Moffitt's Manx GP victory on a JHS Supertwin here.
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Mini Twins specification SV650-based racing motorcycle: |
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(Click on a picture for extra-large image) |
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Low-mileage, fuel-injected donor machine which is stripped and rebuilt to the following specification:
Forks serviced, revalved and fitted with Öhlins fork springs |
Elka 2-way adjustable rear shock (upgrade to 3 way is an option) | New Pirelli tyres | Hel brake lines | SES adjustable rear sets | SES clip/ons | Race loom | Talon sprockets and 520 race chain | Full M4 race exhaust system alloy can (upgrade to titanium is an option) |
Lightweight fairing bracket | Lightweight sub frame | Lightweight battery box | Smaller, lightweight high output battery | Power commander (with custom map) |
JHS race bodywork with Dzus fastners (painting is extra ) | JHS race seat pad | JHS
race screen | New brake pads
Engine stripped and inspected; bearings and gaskets replaced as required.
We do offer other options which will be extra please call to discuss these further tuning options and costs.
£ P.O.A
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Mini-Twins Series
In recent years the Mini Twin Racing Series has
proved to be an enormous success, making low-cost
competitive motorcycle sport accessible to many more people. Popular with spectators
too, the series has in the past even been televised on the British Eurosport channel.
Participating bikes must be four-stroke twins under 650cc.
Certain modifications are permitted, such as a race pipe,
fuelling changes, suspension units and race fairings. Please
refer to the organizers web sites for full details of the current
regulations.
Key organizers for the Mini-Twins series are:
North Gloucester
Road Racing (www.ngroadracing.org)
- whose web site includes a useful guide for those wishing to know
more about what's involved in getting into racing;
the British Motorcycle Racing Club (www.bemsee.co.uk),
whose site also offers a comprehensive source of information about the sport.
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