[Spridgets] major motor problems

[Shop at " Just Brits "]

Since Jess 'seems' to be a newbie B.J., methinks your statement of:

<quote>
...but in that situation you usually replace the cam and go on with it.
</quote>

is quite mis-leading.  Jess, whilst replacing the cam would be correct,
the entire motor should be disassembled and totally CLEANED and
bearings fully inspected !!  Ditto the cylinder walls.  Until you can
report back [BEST with pics which I will be happy to host instead
of those "free" sites FULL of advertising <G>] nobody should "offer
up" further advice except the above and below unless I have missed
something <G>.

Since the cam "broke" the is a very good chance of small pieces
of metal that have circulated throughout the motor
scoring/scouring bearing surfaces, crank surfaces, &/or cylinder
walls plus have been thru the oil pump surfaces.  None of which is good.

Whilst it is true that the motor "could" be re-built with said
'surfaces', it would lead to very premature failure !! 

There is ZERO chances of me doing the above without a full break-down, 
complete cleaning [dip BUT remove Engine I.D. Plate<G>], and NEW  
bearings at minimum  for my own or customers' motor(s) !!

Ed