I have an 04 yfz 450 se. Today while I was riding the back tires locked up and the engine died. Now i can't even get it to turn over. I pulled the starter clutch off to see if the starter was bad and it worked until i put the clutch back in. All it does is makes a click when i push the electric start and a high pitch whine. I was only doing about 30mph and i hadnt rode hard at all that day Can someone please help?

 

Well hate to tell you but your engine locked up. Droped a valve, crank bearing froze up etc..... Time to rebuild....