:welcome: aboard HondaCrank. I would say do a search on this as the subject has been really heavily covered. There's generally two forms of restriction on these bikes. One is in the speedo and the other is in the inlets between the carbs and cylinders.Hi as the title says i need some help with derestricting my cbr400. Any help and advice on how to do this would be much appreciated
First thing I would suggest is an oil and filter change. Trust me, it will help if the issue is not serious.I have now managed to derestrict the bike but now have a different problem. When i am in 6th gear and hit around 10,000 revs it jumps out of gear. It has only started happening since i derestricted the bike and in no other gear. Any help solving the problem would be much appreciated.