Super cool styling and agile handling make this a great city bike or back lane scratcher. The standard set up tends towards the bike being lean on the fuel mixture. It is possible to fit a GPR exhaust with no further modifications but to get the best we would also suggest fitting one of our Multilevel fuel controllers or having the ecu re-mapped. This advice is true for all aftermarket exhausts.

Only £353.58 Derbi Mulhacen 659 Exhaust - GPE Stainless GPR’s best selling exhaust the stainless Grand Prix Evolution is a perfect match for just about any bike. Developed during GPR’s three year stint in Moto GP. Shaped to maximise ground clearance and im...» more info

Only £405.73 Derbi Mulhacen 659 Exhaust - GPE Carbonox Developed during GPR’s three year stint in Moto GP. Shaped to maximise ground clearance and improve aerodynamics. It is not possible to mass produce this shape in carbon fibre so GPR have produced a c...» more info

Only £426.59 Derbi Mulhacen 659 Exhaust - GPE titanium GPR’s best selling exhaust in titanium the Grand Prix Evolution is a perfect match for just about any bike. Developed during GPR’s three year stint in Moto GP. Shaped to maximise ground clearance and...» more info

Only £249.28 Derbi Mulhacen 659 Multilevel Manually adjustable fuel module. Can be set for a variety of different conditions to optimise fuel/air mixture. Has three different settings for low, medium and high rev range. Uses the adjustability...» more info