I will buy a new motor anyway as it?s the only thing left to replace, however...
I gave my motor to a friend who is a motor specialist and rewinds motors for a living. He stripped it down and found two issues. The resin was starting to degrade on the windings and the positive brush was tracking to earth. He re-dipped the windings and sprayed the inside of the casing with anti-tracking spray and reassembled and apparently the motor now tests fine. I got it back off him this evening and was really hopeful that it would fire right up, but on fitting to the Bike, it?s exactly the same, which is worrying.
I think I?ve ruled out it being any thing mechanical as when I remove the spark plug, the motor will turn the motor over all day so it?s almost like the bike has too much compression for the motor to turn it, leading me to believe the motor has somehow got weak. I have read on various KTM forums that you can buy a 410w starter as opposed to the 350w model fitted to the 14-15 gasgas models, so I think I?ll get one of those and see how I go.
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