Which Primary oil to choose? stiffer clutch spring
#22
What he said...................................
Harley Davidson, the most efficient way to turn gas into loud noise without the side affect of horsepower!
#23
Seasoned HDF Member
#24
Outstanding HDF Member
#25
you guys using ATF.how old are your bikes?ive got both ATF and syn oil.im torn on which to put in the primary.i want to run ATF for the wet clutches but am worried about bearing damage.i know AT's have roller bearings in them and never seen any bearing damage done but there small roller bearings.and some thrust bearings.i bought a quart of valvoline 4t today but now i see its not enough im 6ozs short.has anyone used the belray type primary fluid?is it thin like ATF or thick like MO?
#26
Outstanding HDF Member
you guys using ATF.how old are your bikes?ive got both ATF and syn oil.im torn on which to put in the primary.i want to run ATF for the wet clutches but am worried about bearing damage.i know AT's have roller bearings in them and never seen any bearing damage done but there small roller bearings.and some thrust bearings.i bought a quart of valvoline 4t today but now i see its not enough im 6ozs short.has anyone used the belray type primary fluid?is it thin like ATF or thick like MO?
#28
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From: People's Republic of Boulder Colorado
The oil in your primary is not for oiling any bearings, it's purpose is to oil the primary chain, nothing more, that's why it matters very little what kind of oil you use and has a long interval between oil changes. On the old bikes, we would seal off the return sump from the primary and run 90w gear lube in there to keep the chain lubed. Never has an issue .......
#29
Seasoned HDF Member
The point is though, that everything in my primary is original, ( even the clutch plates,) and I've just turned 105,000 miles.
It would seem that that's about all you need in there.
Mobil 75-90 Tranny, Mobil 20W-50 V-Twin in the motor (if you're asking.)
#30
Outstanding HDF Member