Full power misfire and low speed cutout

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Joined
Apr 22, 2018
Messages
1
Location
Cambridge
This may be 2 separate problems.

The bike will happily cruise along at 70-80 mph all day.

It stutters and misfires at full throttle in the higher gears but does continue to pull - I thought this might be a breather problem so I tried it with the fuel cap open and it still has the same problem.

It randomly cuts out at low speed although I haven't found a pattern. It did it a lot when filtering through traffic a few days ago. Today it did it a couple of times at very low speed and once slowing from 50 down to 40 mph.

After cutting out I have to come to a stop and wait 10 seconds before hitting the starter again at which point it fires up straight away and I can ride away.
 
check throttle body rubbers @ cylinders.
similar issues if they are split or loose.
 

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