if the kickstarter is not returning completely or weak spring tension is causing it to drop upon acceleration , the pawl (which is locked out in completely up position) will be dragging inside the layshaft low gear .
could also be the kickstarter stop plate is damaged or come loose . it holds the pawl down when the kickstarter is in the up position .
when you take the kickstarter in hand , can you push it up further ? is it not returning to fully up and /or being held there with reasonable spring tension ? if it's not then it might just be the spring which is accessable by removing the side cover . anything else you need to remove the gearbox which requires removing the primary cover dimantling the clutch and removing the main shat nut .
another thing i though of is it could be the layshaft needle bearing in the kickstart spindle going . you really need to deal with this problem before anymore damage is done .
The kickstart does come back all the way. It doesnt rotate back when I hold it with my leg. Spring tension seems good but maybe not enough tension. I noticed when I put the bike in first gear the kickstart shaft moves out I will have to order gaskets before taking side cover off.
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