What’s wrong with my GSX-R’S gearbox?
When my Suzuki GSX-R1000 K5 is running hot around town it becomes a little less positive when changing gear and sometimes shows the wrong gear position. Most annoyingly, it immediately stalls when stationary at traffic lights when I change from neutral to first. I have checked and cleaned the sidestand cut-out switch and adjusted the clutch and the cable. The gear lever action has improved, but the cutting out persists unless I rev the bike over 4000rpm before selecting first. Brian Coles, email
Answered by Dave Ball, Fowlers Bristol We have changed the gear position sensors on 20 GSX-R1000 K5s in the last 18 months − all had similar symptoms. The sensor isn’t just telling you which gear you are in, it’s also telling the ECU so it knows to use the correct fuelling map. Perhaps the reason you can keep it running by blipping the throttle is that you get more fuel into the engine despite the bike thinking it’s still in neutral so it doesn’t need much gas, so you get past the critical point. The sensor costs about £70 and it’s easy to get at, as it is secured by two bolts and an O-ring above the front sprocket.
K5 is a legend but gear sensor can fail