Like I stated earlier, the bikes in the TT game do not slide.
Please accept that just because it doesn't happen to you, that doesn't mean it doesn't happen to other people. I've recently started getting this too and it's becoming increasingly frustrating.
I wasn't getting it at all for the first month or so, so I don't know if an update has made it worse and my riding style's made it come out more or what. Up until now I've been able to go flat out and complete several laps without crashing, albeit crashes that I knew were my fault and I'm
always happy to accept that (I get this issue on all circuits, not just Snaefell).
What happens is the back just slides out to an almost 90 degree angle
for no reason. There's no forceful error behind it, there's no feeling like you're at the limit of grip and think "This is going to go if I'm not careful" - it just
happens. I get it at slow speeds, fast speeds. It happens when I'm braking, and when I'm not braking, and to top it off for the first time, I just got it on a straight. For no reason. Compared to when I wasn't getting this a month ago, it feels like no reason.
I can't find a pattern to it. I know there's bumps and there's suspension compression and rebound and all that (I don't ride motorcycles so i don't really know the correct terms), but it's like the rear wheel on ice. It just floats out like someone opening a gate.
I use a controller with all assists off (I've recently switched off combined braking which doesn't make things feel any different) and I've tried different controller sensitivities. I can't think of any assists that would stop this from happening, personally. It's such a peculiar thing. I was thinking it might've had something to do with weight shifting, perhaps accidentally pushing the thumbstick forward when I'm steering, shifting the weight forwards and causing the rear to lift.
Like I said, I wasn't getting this at all until recently. I thought others complaining about it were doing something wrong. Now I know they're not. I've also seen a number of posts on Steam complaining of the same issue.
And please don't get me wrong - I
love this game. I'm not some kiddy gamer who bought it because of the hype it got. I'm 37 years old, wanted a TT sim for years and I love nothing more than a simulator to be as realistic as possible. I just can't figure out why that has suddenly started happening.
But you really need to accept this is happening to others. Whether it's down to riding/playing style, assists or what, the bikes most definitely do slide under the right circumstances. We just have to find out what those circumstances are and hopefully get it corrected.