I crashed an F4i about 2 months ago and have had it back running over the past 3 weeks. Ever since I got it back on the road the rear brake is virtually non existant. Before the crash it felt like it had the normal amount of stopping power being about 30% of the overall stopping force. Now when I'm at highway speed I can mash the hell out of it and it doesn't do anything to slow me down. In the garage it has enough power to stop me but I can still move the bike with my other leg.

I bled it with a vacuum and there is NO air in there and all fluid is fresh. None of the hoses appear to be damaged and I can't find any leaks. The operation of the pedal, m/cyl. and caliperseems fine as it does 'function' it just can't do any work. I could change the pads and measure the disc to see if its in spec, but the bike has less than 5,000 miles. Any suggestions as right now I have zero rear brake and I like using mine.

 

bleed it more. I use mine mostly for slow moving stuff n of course for gravel n grass.

 

Just figured it out. Motor was locked up with oil and coolant on top of the pistons. Oil sprayed out exhaust while can was off during repair. Oil got on disc which soaked into pads, I forgot all about my can having been taken off during the repair process.

 

kewl deal.