My understanding is that SSL only make bits for the P6 not 4, and speaking to Dan very recently whilst buying some bespoke dampers, he's decided to drop the CX and concentrate on Trad upgrades only
Jon thanks for that info, will give SSL a call in a week or so, as I wanted a spare set of of their links for the front antiroll bar.. You are right that it was just the Six that they produced a suspension kit for, I read that the Four from the factory was not bad, so they did not think it was worth trying to improve it at the time.. then came the Nitron's. With fewer numbers of Plus Six made compared to the Four I guess there was little overall profit, and once again there are Nitrons now available for the Six... Pity, as from a touring perspective the SSL suspension is a huge improvement for the Six, just needed the ride height adjustment on the coil over that the Nitron suspension provides.