I’ve got a Chassis Motorcycle version and ive tried tweaking the Tuner, but when i test it in my baseplate, the bike just slides after gaining speed. The same thing applies to when i try doing a wheelie.
This reply is quite some time after this. I know.
I had the same problem as you, and what I found out is that the baseplate your on is Plastic try changing its material to Concrete.
That’s what I did above and it worked perfectly after.