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[sprucebruce]

I have a 2011 classic EFI. Going through the gears (up or down) is fine apart from fourth gear. There is an initial stutter which lasts about 3-5 seconds and then disappears. The only way to avoid this happening is to open the throttle very slightly for 2 or 3 seconds before opening it up to accelerate. There doesnt appear to be any mechanical noise related to the gearbox and all the other gears work without a problem.

[Alan R]

Hi guys-------- sounds like a partial richness when under initial load ?? Given its' young age maybe a trip to your dealer and a diagnostic check ??-------- Is it still within warranty ? (long-shot but it might just be )

[sprucebruce]

Alan, Thanks for the feedback - booked in to nearest Royal Enfield specialist at the end of the month. I live in rural France and nearest specialist 2 hours away.
The more I ride it the more I think the problem is something electrical / engine management system!!

[Alan R]

--------- good luck with that then !!-- My guess is a sensor of some kind showing early signs of age/stress/failure/etc and giving the CPU some temp. duff info ?? Just like becoming a Pensioner, maybe ??

[Roeland]

Did you try to check the ECU system for error codes? It is relatively simple to do this. There's a loose wire at the ECU you should ground with the ignition on and then you monitor the blinking of you engine light. This will give you the codes of what is wrong with it.

[Roeland]

sorry - the error codes are as followed :
LONG 0 SHORT 6 Throttle Position Sensor (TPS) circuit malfunctioning
LONG 0 SHORT 9 Manifold Absolute Pressure (MAP) circuit malfunctioning
LONG 1 SHORT 1 Engine oil Temperature (TE) circuit malfunctioning
LONG 1 SHORT 7 O2 Sensor circuit malfunctioning
LONG 4 SHORT 5 O2 Sensor heater circuit malfunctioning

Engine will NOT Start but will crank. MIL will glow continuous
LONG 1 SHORT 5 Rollover Sensor circuit malfunctioning
LONG 3 SHORT 3 Injector circuit malfunctioning
LONG 3 SHORT 7 Ignition Coil circuit malfunctioning
LONG 4 SHORT 1 Fuel Pump circuit malfunctioning
LONG 6 SHORT 6 Crankshaft position circuit malfunctioning