This Suzuki GSX-R1000 is a nice example of the breed, fitted with Arrow cans. As usual with Suzukis it’s an easy bike to work on, and with, and the fuelling was fine after we’d set the PC V up on the Dyno. The real issue with this particular model GSX-R is the twin cans, and thus 4-1-2 exhaust; quite simply, it doesn’t work very well, and the left-hand can is pretty much there for show.
A full 4-2-1 exhaust system would work best for the engine, but for racing purposes (any class with a ‘silhouette’ rule) twin can must be used as per the stock bike. The problem seems to be removing back pressure from the 4-1 section – a flat spot follows around 5,000rpm. The ECU is also quite restrictive around that area, which doesn’t help.
All round though, this bike turned out well, and left with 168bhp, up 5bhp.