right have just fitted a new freewheel - quick change over and only took two hour
had to dremel grinder cut the old one off as it wouldn't shift and had a bad way to lock on tool to get off
i beat the fooker
so put the back wheel on again and still had a tight spot on the chain
I have come to the conclusion of why you get a tight spot in the chain
two parts : 1st when lining up a back wheel we always look at the tire to see if it spin straight - tire is not always made true / throwing it out a bit - axle side may not be equal in drop outs on each side - but i think that the thing that throws it out most is the chain ring !
the chain ring may be flat and round but when putting it on a 1pc it is at a slight % out when spinning it without a chain on - it may be less them 1-2mm wobble when turning and this may not seem much, but it will make a difference
freewheel may have a wobble in it - can be more with cheap FW
so if a chain ring spins round it could be the ring is not at it's centre point and /or the one piece crank is not spinning true - if looking down on the chain ring and seeing it turn then you may see the wobble, and with a chain on and the freewheel also moving with a wobble it can all throw it out
this is what i think that a tight spot is on a bike chain - any thoughts please welcome
cheers B