So I've been having a few problems with my St 1300 in particular I've been experiencing a lot of backfiring whenever changing gears and just in general use.
When I pull the clutch in to change gears it will backfire and also just when riding it will backfire from time to time, but mainly on acceleration when the clutch is pulled in.
There is also a very rich smell of fuel from the exhaust and my fuel usage has skyrocketed.
I have checked the five way vacuum hose connection and it is clear and I've replaced the spark plugs and done an ECU reset.
You're my latest attempt to diagnose the issue when I block the air hose that runs from the rear of the air box down I get a smoother idle and no backfiring.
This is as far as I have gotten and I'm hoping that someone can make a suggestion as to what I can do to fix this.
Cheers
Shiney

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