Hiya pal, Not entirely sure bout this. WE all cant resist the urge to run our bikes in but it needs to be done our it could effect your engine seriously in the long run..... for example, Not being able to go over 75!!! Ya best bet is to double check that your dealer isn´t lying to u/does´nt know! Go to www.nsr125.com and check every part of your bike and see if your restrictors are still in place. Changing parts such as exhaust, front sprocket etc will guarantee increases. hope this helps