I'm beginning to think that this charging issue is nothing standard, seems like every Triumph has a slightly different voltage/RPM value. Mine charges slightly more at idle than off throttle a bit. Really crazy, but they go down the road OK.

2005 Model . Two Fast Eddy stickers , a bell and a clock . She's Lola . She tinkles and keeps time . http://s649.photobucket.com/albums/uu211/britbike05/