Tyre lock up while up shifting

[Comfortablynumb]

Hi guys and girls, had a bit of a weird one.

I've been making my usual commute, a couple of times I've been up shifting 3rd-4th and I could swear I felt the rear lock just for a millisecond enough to scare me.

Could this be down to lazy shifting? I couldn't recreate it afterwards.

[Six30]

Is your chain to tight ?

[Comfortablynumb]

I don't believe so I checked and adjusted it recently, but I did have it in for its mot and had the tappets done since.

I wouldnt of thought they'd adjust it but I'll double check tommorow.

[megawatt]

Sounds like dodgy selector forks or worn selector drum. Try to be more positive when shifting.

[Comfortablynumb]

Maybe lock up was a bit dramatic, more like a very sudden drop in power.

gear box has been a bit funny since I got the bike, i have to make two half clicks from 1st to get it into neutral, (the n indicator light comes on after the first click but it's still in 1st gear).

I'll have to get round to adjusting my gear lever hopefully that'll help.