1983 yamaha xv920 virago starter/flywheel info

[1983 xv920 virago]

I have 1983 xv920 virago mint, mint very low miles, under 3,000 for a long time the starter would slip? getting worse and now it would just slip not even crank over at all I've also bought new starter same thing and just so you know it's not the battery, not sure what to do and who to trust? I'm first owner and realy never use bike as you can tell by miles,bike is spotless and dont want anyone to work on it I do all the work myself I've had been automech so I think it's not hard 4me can u send me any info about this @ pphplumbing@hotmail.com ??shim kit?? flywheel??