Ok, the 97 is about to roll over 30,000 miles so I figure I should start replacing some often neglected parts. My first project starts at the front with new head bearings and I was wondering whether anyone here has used Thurn. I just saw them on ebay and wondered whether they'd be better than ordering OEM from Ron Ayers. It appears that even with shipping the German Company may be cheaper. Any thoughts?
Note: when installing tapered rollers, the factory specified torque for the roller type bearings is no good.
IIRC, the VFR800 specs 17 or 18 Ft/lbs for the OE rollers, but tapered head bearings like around 3-5 Ft/Lbs.
If you try using the factory torque spec with tapereds, the steering will be super-heavy and you'll think the bearings are crap!
Go ahead and tighten up to the factory recommended torque 1x, rotate the bars back and forth several times to seat the bearings, then back off to 3-5 ft/lbs afterwards.
Note: when installing tapered rollers, the factory specified torque for the roller type bearings is no good.
IIRC, the VFR800 specs 17 or 18 Ft/lbs for the OE rollers, but tapered head bearings like around 3-5 Ft/Lbs.
If you try using the factory torque spec with tapereds, the steering will be super-heavy and you'll think the bearings are crap!
Go ahead and tighten up to the factory recommended torque 1x, rotate the bars back and forth several times to seat the bearings, then back off to 3-5 ft/lbs afterwards.
Thanks Veffer, i'll check into that site. I believe they are tapered, is that a good thing or does it really not matter? The originals have been fine thus far but its more a preventive thing than anything. The fact that they've been fine I figure means the OEM ones have done there job so I'm not sure if there's any benefit with the tapered. Thanks for the info on torqueing.
If you've ever seen the roller bearing races after 30,000 miles and see how they've brinelled over time, you'll appreciate the greater contact area of the tapered rollers.
Instead of being point contact, there is contact on the entire length of each roller, spreading the load and avoiding brinelling.
ditto on all balls racing! Tapered bearings and races top notch gear!! Not too expensive, Thurn will be more just because of the distance shipping, all balls is good stuff!
HispanicSlammer, Jan 30 2007, 12:53 AMditto on all balls racing! Tapered bearings and races top notch gear!! Not too expensive, Thurn will be more just because of the distance shipping, all balls is good stuff!
(IMG:style_emoticons/oldemoticons/fing02.gif) Thanks for all the input guys, you've given me all the info I "should" need. I'll be yelling if I get into trouble, which is entirely possible and likely.
End of thread · 9 posts recoveredWayback Machine snapshot 29 Mar 2007