can replacement tail lights for a newer model Trajet fit a 2001 model

Yes but need a little mod at the mounting point. It very easy, no worries...I changed mine too. :)

how about the front signal lights?

any mods needed to be done or a straight forward rip and replace.

Signal lights is striaght forward, no mod required. Just unscrew and push out will do... :)

with regard to changing old tail lights to new you say you need to do a little mod at the mounting point.
Can you explain what you need to do as I'm thinking of changing mine

many thanks

Its the brake lamp internal cover that need to be moded. If not, the whole assembly can't be fitted in nicely.
If you are looking for the new lamp, I have 2pcs for sale which was taken off from my old Jet. Have moded and it just plug and play....PM me for pricing, thanks. :)

as front signals are £40 + a side in England , I wondered if any one has tried removing the lens , taking out the orange piece , resealing the lens and then using an orange bulb ?