26-02-15, 12:17 PM
Obviously up to you now what direction you want to take but it looks like with all the aove that it would at least be worthwhile investigating the restriction.
Appreciate it costs money but if it was me at this stage i would put the bike into a yamaha dealers and just ask them to inspect for and remove any restriction kit.....a yamaha mechanic yas no doubt seen them a million times and will be an easy job for them and if there isnt anyting then it has come from a good source and you can take things from there more accurately.
Easiest way to go fast........don't buy a blue bike