Bolt-ons: Engine performance
K&N stage one jet kit: £88.99
Boosts power by about 5 per cent across the rev range.
K&N High Flow air filter: £34.79
Replacement paper element improves airflow.
Pipercross air filter: £27.50
Replacement foam element is cheaper option.
AkrApovic race system: £584
Various finishes and road-legal versions available.
Micron Zeta race system: £408
Worth around 10bhp, requires carb rejetting.
CSK clutch spring set: £8.23
Heavy-duty springs are stronger than the originals.
EBC clutch plate set: £38.19
Heavy-duty, cork-based plates are less prone to wear.
Remus Grand Prix end can: £311
Road-legal, 76mm bore, titanium finish.
Remus Grand Prix end can: £291
Race only, 76mm bore, carbon finish.
Micron Delta Can: from £162.95
Road-legal, alloy or carbon finish, worth 3-4bhp.
G-Force end can: £210
Race only, carbon finish.
Harriss Exhaust Bracket: £38.25
Aluminium bracket needs you to bin pillion footpeg.