Here is southern Spain many of us also noticed slip offs in town when comming back from a ride, probably caused by the tyre not behaving well when it got too hot. Roundabuts became a challenge after a long ride. That, and the fact that they did last less than 3000km, are the main reasons I did not like the oem tyres

Hmmm. That's what I'm running. Maybe it's my tyre pressure gauge showing incorrectly.

I guess your weight and riding position might have an influence.

It does. When I sit back a bit it reduces the wobbles.

I've just moved the bars back a bit to see if there is any difference. The wobbles were still there but not as bad until I hit the rev limiter in top gear then it wobbled like mad and I've now got brown pants.

I have noticed that it wobbles more when I have an empty tank. Also if it wobbles at a ton and I put my left hand on the tank then the wobbles stop. It's got to be something to do with wind hitting me and starting an ossolation. Maybe a fairing would help but apart from that, I'm stumped for ideas.

Strange never really thought about it until now but mine wobbles more on windy days (head wind), running the original front and a Conti rear, 30 and 31 respectively.

strange cause you can't fit the wrong spacers (they are different) from one side to the other and the only other thing I can think of is if the hub bearing are worn, but if they were you would hear a racket when braking. Worth having it re-balanced, and I hate to think that the muppet that replaced it, put a wrong tube in it. (sounds a bit like it, you never know) See this is why you should never use a cow-boy, and the mistake that the RAC man did is thinking your other tyre was tubeless as it does say so on the casing but didn't realize it wasn't because of spoked rims need tubes otherwise they'll leak and probably attempted to plug your tyre with one of those widgets, which only work on really tubeless tyres.

No racket when braking, thankfully. What do you mean by wrong tube?

RAC did try to use the rubber/sealent thingy, didn't work first time so tried again, still went down, rung the dealer (Poole Yam) who gave me the bad news. You live and learn ;)

Got RAC to take bike to the nearest large bike specialist, no loacl Yam one could help in less than 3 days. Cut a long story short 3 days later :) I got my bike bake after going to pick it up twice with it not being ready and a trip to work and back on the train due to having no bike, should have gone to JT's the Yam dealer and hoped they could have got it fixed earlier, (moved to South Wales since I got the bike).

wrong tube as in wrong size, either smaller or bigger it can't be good