I had this on my 2017 Trophy during the first few hundred miles.
Returned to the Dealer who were prepared to change out the complete Clutch under Warranty
but on investigation and consultation with Triumph, they dismantled the Clutch Basket,
rotated some of the Friction plates ( I think they said by 180 degrees and possibly every other Plate )
then re assembled it, saying if I was not happy they would continue to replace the complete clutch.
The judder was completely eliminated and has been as smooth as silk ever since.
If I remember correctly I think the Dealer explained it as being something to do with the Bike
having been left standing for a considerable time, and oil soaking into only a portion of the friction plates.
Sorry I don't have any more details of precisely what they did,
but it may be worth your Dealer ( or yourself ) enquiring of Triumph about this.
email :
after.sales@triumph.co.ukIf you are competent enough to service the Clutch yourself ( access to the official Service Manual
is recommended ) note that there are 9 Friction plates in total. The Outer and Inner Plates differ from
the 7 intermediate Friction Plates, and also from each other and MUST be refitted in the same place.
The Friction plates should be cleaned, their thickness checked against specifications
and then coated in clean engine oil before reassembly.
It would probably also be worthwhile carrying out an Engine Oil & Oil Filter change.
Cheers

