Which Schaeffer oil is best to use in Harley Davidson Primary Drive
I have been using your Schaeffer #705 20W-50 racing oil in my primary drive for some time now in my older Harkey. I have purchased a '07 Harley and want to continue using it but I am wondewring if there is somethig better. What do you recommend I use in the transmission and the primary drive? I have no problem using the #705 20W-50 in the transmission, but what do you recommend for the primary drive? Any other information related to this would be greatly appreciated. Thank you too for your assistance.
There are several choices for the primary drives on Harley Davidson motor cycles. The optimum product would be Schaeffer #707 20W-50 but it is also okay to use Schaeffer #705 20W-50 , 239S 30W, 40W or 50W depending on temerature. Most Harley owners use the 239S 30W in their primary. Schaeffer's #707 V-Twin approved oil has been slightly reformulated as an upgrade from #705.
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