14T Swap

[dlearl476]

i did a rough measurement the tightest spot in the chain slack is about 15mm and the loosest part is about 40mm.

That's where your vibration is coming from, right there.

how come? some tight links?

My WAG is that the links wear at different rates.

change of chain in order???

Yes.  FWIW, I've always heard that the fastest way to ruin a new chain/sprockets is to put them on with old components.  I always replace all three as a group.  I don't know if Chris has them, but I buy "kits" from AFAM that include all three with about a 10%-!5% discount over ordering the components separately.

[Fruity]

thanks for the feedback. i hear loud and clear. cheers. have a good christmas.