2000 Yamaha YZF-R6 "speedometer goes zero back" Questions

speedometer stops wrkn and the rpm stops wrkn. my bike wont start back up. can any1 help me please......... its drivn me nuts tryn 2 figure it out. also when i put on the flashers or beep the horn the

...speedometer number starts at 15...without reving the engine..when i do reve the engine then it changes..it causes no real problem when i practice ride it..also my rpm needle, wen i reve it goes to ...

...speedometer goes to 25 instead of starting at zero. when i ride it it goes slow. can it be because of the speedometer. cause it is brand new. new everything except the speedometer dismantle your dash ...