If you look at the Triumph SCHEDULED MAINTENANCE CHECK SHEEET for Thruxton,Bonneville, Bonneville T100, America, Speedmaster & Scrambler, it lists the Valve Clearance - Check/Adjust period at Every 12,000 miles/20000 Kms 2 years*. With the "*" being "Whichever comes first". So if you are like me you should be checking the valve clearance every two years. I only put about 3,500 miles on my bike a year, so most of my scheduled maintenance will be time dependent instead of mileage dependent.

Tom


Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety. Benjamin Franklin, US author, diplomat, inventor, physicist, politician, & printer (1706 - 1790)