Main Motorcycle: '06 Scrambler/'07 BonnieB
Join Date: Aug 2007
Location: S.E. Idaho 6,200 Ft.
Other Motorcycle: '05 Yamaha WR 250
Extra Motorcycle: '05 Tiger
I had a very similar issue when my Girlie was new to me last fall. Assumed the worst but ultimately one of the two fittings coming out of the overflow tank was leaking ever so slightly. I believe it was a combo of Slightly higher pressure at running temp but mostly just sloshing around while riding. I replaced the plastic fitting with a copper one and a new rubber bushing between the overflow tank and the fitting.
'06 Scrambler: De-AI'ed, CARK/Uni Pods, Emgo 12" Shorty's, 145mains, 40pilots, stock needles, no shims
'07 Bonnie Blk: De-AI'ed, CARK/Uni Pods, NH Peashooters, 145mains, 40pilots, no shims
'05 Tiger 955i: No airbox plate, Debaffled stock exhaust