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boomerguy · #71 8th September 2020

My oil tank dipstick is accurate and it shows my engine oil never going above 220F. I assume (dangerous word) that the primary oil would be somewhat less since it isn't near the combustion. Anyway, my clutch lever is lighter and smoother and hopefully, the FAG 7200B will last much longer than the stock bearing.

Does anyone else in the forum have any positive or negative experiences they would like to report with either bearing?

Nibelungen · #72 9th September 2020

Shanneba wrote on another forum to have done some tests about primary oil temps...

he drained the primary oil after a run... measured it... and the temps of the oil (if I remember well) were about 150 F...

then there are somewhere in that forum even infrared captured temps... of the engine of a BT... on run on a dyno for an hour... and the primary cover (not the oil... and not the clutch inspection - regulation cover) was around 260 - 270 F...

Tomcatt · #73 9th September 2020

I installed the TVP version 7200B a year plus and 8,000 plus miles ago when I got rid of the grenade plate. A precautionary thing as the bike only had maybe 1,500 miles on it and neither had failed. So far so good. My rear cylinder head temp doesn't go over 355F so it's hard to believe the clutch release bearing sees 250F. I need to get an infrared temp gun.
Using a radial ball bearing, even a deep groove version in this application just seems like a lousy way to save a couple bucks. I think the guys who have had theirs fail at inconvenient times would agree.

Nibelungen · #74 9th September 2020

we have to consider that the specs stated by FAG about their cages are intended as continuous usage of the bearing... on a spindle for example... meanwhile in the application on our bike it's not...

another thing stated by FAG is that additives in oil can shorten the life of the TVP cage... i don't think it's synth vs mineral... since nowadays additives are put everywhere... maybe they simply stated this to stay "on the safe side"

anyway for future upgrade... if at disposal... better way to go is the FAG 7200B JP suffix with steel cage...

so this morning (my last day of holiday) i was been at SKF headquarters in my city and ask about FAG 7200B JP
they searched and found that in Italy there aren't...
some present in some warehouse in Germany... they cannot order few pieces though...
they took my cell number to call me if... and when... them were possibly at disposal

i did not bought nothing today... but they confirmed me it is VERY much better a FAG 7200B TVP than an all metal FAG 6200 for the kind of job i described

that's the reason i posted all this... to improve knowledge about this upgrade... since Hippy quoted this thread in sportsterpedia

boomerguy · #75 9th September 2020

[QUOTE=

i did not bought nothing today... but they confirmed me it is VERY much better a FAG 7200B TVP than an all metal FAG 6200 for the kind of job i described

that's the reason i posted all this... to improve knowledge about this upgrade... since Hippy quoted this thread in sportsterpedia[/QUOTE]

Good info!

Nibelungen · #76 21st September 2020

post this page of a FAG specs document who claim max temps for JP suffix

bye

Daniele

boomerguy · #77 21st September 2020

Considering the oil temperature in the Sportster, combined with oil additives, is there an estimated life span for each of the two types of FAG bearings?

Nibelungen · #78 21st September 2020

Quote:

Originally Posted by boomerguy

Considering the oil temperature in the Sportster, combined with oil additives, is there an estimated life span for each of the two types of FAG bearings?

who know...???
only experiences of who replaced them time ago can be useful...
anyway
that 7200B TVP is designed to be subjected at intensive use... like on a dremel...
in our clutch it's not the case... forces in play are lighter isn't it?

like said in previous post I think so:
personally I will keep the 7200B
temps are sure not higher of 120 C
additives are everywhere and no one can know the ones that can damage a polyamide cage overtime...
time will tell...
but I see no other options since the 7200B JP is not available in Italy...
and definitely I don't want to buy it on the net

yeah... sure... you can reinstall the OEM 6200...
but I won't... at least for now...

i have bought for mind sake... a spare 7200B TVP and a OEM brand new FAG6200
so now I can wait and see... and then... in case... I will do what I prefer

boomerguy · #79 21st September 2020

Yeah, that's kind of what I think. Only time will tell. In the meantime, I am very happy with my 7200B in terms of smoothness and lightness when compared to the stock bearing I removed which only had 15K miles on it when I removed it.

Hippysmack · #80 21st September 2020

Here is the plastic cage service life chart from Nibelungen's earlier PDF link.
I didn't see one for steel cages.