rcm273;305708 wrote: I posted the exact same question on ThaiVisa a month ago. I have a Versys with a Yoshimura twin port carbon, with no baffles / dB killer.
The usual TV response, 3 people with no actual hands on experience posted that it was best to change it. One guy who said he had a 2 brothers on a CBR250 and Leo on another 750cc bike replied "the guys don't care, they are just concerned with the VIN and frame number"
I can confirm him to be correct - I took mine to transfer the title, didnt give it large in the inspection shed, I just idled up - the guy did his little trick with a pencil and masking tape - the assembled crew of truck drivers wanted to know how much it cost and how fast it went.
15 mins later after sitting in a sweaty office, I was out the door - The only shock that day was that it cost 1000B for the inspection.
I'm not saying that you won't have a problem, chances are, you will be fine, just leave the aftermarket pipe on.