Honda C90 rear brake problem.?

When I use the brake it makes an awful metal on metal screeching/grating sound and the bike stops dead. (I can feel it as well though it feels like it's under the engine some where) There's no slowing down, just a dead stop. It had new shoes a couple of months ago and the mechanic checked it out yesterday and couldn't find any thing obviously wrong. Any ideas?

Answers:
You should take it to another mechanic.
The cam that activates the shoes, might be sticking, not letting the shoes return. It should be looked at by a competent mechanic. It's such an obvious problem. Someone with half a brain should be able to diagnose it.
Read your instruction manual. If it is new and less than 3 years old you may try the dealer you bought it off from. If it older you might contact an engineer or the manufacture.
How thorough was the mechanic? Did he remove the wheel?

I would check whether there is a crack in the drum.
My C90 is 24yrs old and its never done anything like that, could be a number of things though ? Best go to a Honda registered garage or see if you can find an older mechanic with C90 experience ?.
If your doing short journeys it could be rust, or they could be the wrong size shoes.
ah..il bet its got a spoked wheel. the rear brake drum is cracked, and whe you apply pressure it essentially makes the drum oval.

or youve put the brakes in back to front.

or teh aluminium brake activation shaft, where it runs thru the hub has siezed, should be an easy fix for a competent mechanic.
Well, the closest experience I have was a CB350 that I re-shoed the front brake on. It had a double-leading-shoe drum - probably as much power as a disc just not the control. Anyway it had the same symptoms - in cool weather, or after washing, or in the rain - it was lethally lockable. Obviously on the front this made for an exciting ride.
I couldn't even touch it in the rain.
Anyway I took it apart again, found nothing wrong, put it together, same stuff.
What seemed to help was: I just waited for it to be warm and dry and then lightly rode the brake to get it good and hot. Then let it cool.
Not smoking hot - you should be able to feel it fade a bit when it is getting hot enough.
Several cycles of this heating and cooling seemed to calm it down a bit. It still got grabby when it was cold but not as bad.
I hope this helps.

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