We filled up at Woodall services on the M1, and because I was to lazy to push the scooter to another pump I put normal unleaded in. another one of our lot filled up at the pump next to me and also used normal unleaded in his TS1. His TS1 has done 1000's of miles in its current setup.
this is it.
After about 35 miles he holed his piston with out any warning and I holed mine about a mile later. to much of a coincidence in my opinion. The fuel at those pumps must have been shite.
This is the video, it shows Nige loosing power and slowing down, he carried on for a couple of miles before his holed. and it shows mine suddenly popping.
I've stripped it down, taken the crank out and cleaned all the pieces of piston out of everywhere. It did have a small air leak on the exhaust gasket but it wasn't big enough to course the engine to over run so I doubt that coursed the hole, im sure it was the fuel. The barrel is being re-bored on Monday so the new Wiseco piston I bought a few months ago fits and if I get it all together in time I'll have to run it in during the lands end to John o Groats trip next weekend, which is good as ill get it done in one weekend but bad because the new piston im using is a bit of a test due to it having no reed windows, Ill be cutting a big curve into the bottom of the inlet skirt and hoping that if the engine wants to suck it will be able to through the boyson feeds when the piston skirt is closing the inlet as the boyson are above the piston face.
neat hole
crank out to clean all the bits of piston out
bore a bit scored
crank cleaned
head needs some work
If your filling up at that services avoid pumps 10 and 12
I always use Super no matter which 
its about time I took the cast 245 out tbh.
