I agree with Bob, If you were to take the coil off, and carfully repair the damage (Twist together, Solder, Fill with hot melt glue, And cover with about 1" of heatshrink tube) you should be able to get the insulation back up to scratch.
If the join of the wire and coil looks suspect, make sure its dry, and throw a little melt glue there too.
THe check the module is well grounded and secure (shouldnt move) and fit it all back together carfully, Taking note the flywheel air gap (cant recall it off the top of my head, but it should be stamped on your flywheel.
If you try this you could save a bit of money!
