I like tinkering with the old DT. the new[ ish] triumph needs nowt . it just sits in the corner, I"v just put a new smaller rear sprocket on DT, so its test run tomorrow , with mates,, cold still tho , ,
Hi boyle " downsize the main, to get peak performance, but not too small, get a couple of smaller [ 220/205 . ] do short full throttle runs
then shut of engine and check plug colour,
whats colour is it the now,
And what air filter is on it,