Is there any form of restrictors on the 88 Gixxxer 750? Specs show the bike can go up to 150mph but my speedo shows only 180km/h max(that's about 111mph, a far cry from what's on the specs.). Mine comes with a speed warning light and the dial's set on kmh not mph. If there is, hope someone here could help me out on this. Thanks in advance. BTW, on my last gear the rev counter shows it could only go up to about 7500 rpm, wouldn't go much further than that.