I had been riding my Specialized FSR for 20 years when i bought a Ghost SLAMR. The first sensation was a bit weird. The riding position was pretty different. The handlebar was much wider which made the bike feel a bit clumsy. This was just a matter of get used to it. It still feels a bitbig...
Hi Samwise,
depending what you have changed, you can change it back to the original status and then go to the bike shop. At the same time, if in US is allowed to ride at 32km/h why would it affect the engine? and the warranty? Is just a matter of local laws.
You have to take your own decisions...