Valvoline VR1 oil - why not recommended for wet clutches?

I had the original scored/pitted cams for my 1983 VF750F hard-welded and reground but then chose instead to install the updated cams from a 1985 VF700F. They are working very well but I've received conflicting advice on which oil to use to help minimize future cam/rocker wear. One cam shop recommenced Valvoline VR1 and another advised I use Maxima Break-In Oil.
Initially I used VR1 and the engine felt smooth and the transmission shifted effortlessly. However, VR1 is not recommended for wet clutches so I switched to Maxima. Unfortunately the transmission is difficult to shift with the Maxima oil until run for about 20 miles so I'd like to go back to using VR1.
Has anyone had long term experience with VR1, has it caused any clutch problems, and why does Valvoline not recommend it for wet clutches?
Thanks!

 

This is what they write:

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SPECIAL FRICTION MODIFIERS help minimize friction, keeping heat at bay for maximum power and torque at high RPMs
2X MORE ZINC FOR EXTREME WEAR PROTECTION for even greater film strength and anti-wear protection on critical engine components such as pistons, cams and bearings

Friction modifiers isn't described but could be teflon which likely cause clutch slippage. I am not sure what the zinc will do to the clutch but it may cause problems if it rubs into the friction plates. If it contains teflon I recommend finding another oil.

 

Thanks for your input. I believe zinc works as a lubricant. My main concern is whether the zinc or other material will build up on or deterioriate the clutch plates. I've put about 300 miles on the bike since using the Maxima oil and no problems so far. It does need to be thoroughly warmed before the transmission shifts smoothly. I'll post more info after another few thousand miles.

 

I've tried a bunch and always come back to Mobil 1 4T. It is cheap, available, and works in the street and track bikes. I've sent oil off to be tested and it always looks great and has plenty of miles of additives in it when I change it. Buy it during the rebates twice a year and never look back.

 

Maxima:

Code:

2X Zinc system that ensures immediate and lasting protection.

Contains apparently also zink of some kind (2 times something). In any case stay clear of teflon. Teflon spoils the static friction which is why it is good where you want to eliminate that but bad for wet clutches.
You could try to ask Valvoline if it contains teflon and/or why it is not recommended for wet clutches. They should know whats in it.

 

HP4S and forget about it.

 

Oh - and besides - isn't a "break-in" oil something you use for a limited period and then change to "normal" oil.

 

Many decades ago...yes. Today...not on anything regular people own.