86 V65 Clutch problems!!!

[Five-0]

Looking for advise here.  I have never had any clutch issues until now, but the 86 keeps getting air in the system somehow.  I put all new fluid in the bike and will ride fine for about 50 miles.  Then clutch starts to slip.  I can bleed the system again and then go another 50 miles.  Bleeding through the bleeder at the bottom doesnt seem to get it.  I get it by cracking the bolt at the lever???  Seems to get air up high??  
Any ideas??  No leaks anywhere that I can find.
Is it heat related or something old and letting air get in??

Thanks,  Bryan

[silveradocowboy]

The banjo bolt on the reservoir is a good place to bleed trapped air. The tips and tricks page has some info on doing it.

Check the slave cylinder seals and piston and the line especially where it may rub against the frame or engine for leaks.

Does the bleed valve have thread tape on it? This will help in bleeding the system.

Might also check the clutch discs, plates, and springs for excessive wear.