elizilla
Guest
My sweetie acquired a project bike last fall. It is a 1971 Triumph Tiger, mostly original, and it has 7000 miles on the odometer. It is 650cc, a twin, with one carb for both cylinders. He worked on it quite a bit this winter and finally got it running by replacing the carb with a brand new reproduction Amal unit. With the new carb, the correct new spark plugs, and fresh gas, it started on the first kick and ran smoothly.
Note that whoever had it before must have had the heads off at some point - they broke one of the cooling fins and a motor mount was missing. We do not know the history or what the previous owner might have been doing in there. But with the new carbs it seemed to run pretty well.
So last weekend we trailered the Triumph and the Ural to Tellico Plains. The first day, we were tired from the drive and the weather wasn't great so we just rode 50 miles or so on the Tellico Plain side of the mountains. The rain finally stopped around 4pm and after dinner my sweetie and one of our riding buddies went out for a short run. They made it to mile 12 on the TN side of the Skyway, and then the Triumph died. It had to come home to Michigan in a pickup truck.
Back home in the garage, inspection reveals that the right piston is holed. The left looks perfect.
Anyone know what might have caused this? Remember this bike has just one carb and the left piston looks fine. If it was a carb issue you'd think both cylinders would have it.
Note that whoever had it before must have had the heads off at some point - they broke one of the cooling fins and a motor mount was missing. We do not know the history or what the previous owner might have been doing in there. But with the new carbs it seemed to run pretty well.
So last weekend we trailered the Triumph and the Ural to Tellico Plains. The first day, we were tired from the drive and the weather wasn't great so we just rode 50 miles or so on the Tellico Plain side of the mountains. The rain finally stopped around 4pm and after dinner my sweetie and one of our riding buddies went out for a short run. They made it to mile 12 on the TN side of the Skyway, and then the Triumph died. It had to come home to Michigan in a pickup truck.
Back home in the garage, inspection reveals that the right piston is holed. The left looks perfect.
Anyone know what might have caused this? Remember this bike has just one carb and the left piston looks fine. If it was a carb issue you'd think both cylinders would have it.