Headstock bearing question - SV650.org

26-01-11, 10:38 PM

Changing the bearings on my SV from ball to taper ones as that's what's in my new frame.

Got the races out of the frame ok and got the new ones in.

Had some issues with the lower bearing on the stem though. Had to grind the old bearing off and managed not to mangle the seal. Good I thought til I fitted the taper bearing to find it catches. This is despite the bearing not sitting flush on the bottom of the stem which is another issue. Only fitted the seal as the race I got was without a seal. I went off the part numbers for the ones I took out of the new frame.

Have now read on here that the seal doesn't go back on when you fit taper roller bearings. Out with the grinder again for me. Good job I met a man today from SKF who offered me a good deal on bearings.

When I get the new taper bearings I've read that I need the ones with the integral seal as I'm guessing otherwise the grease leaks out the bottom? What do I do for the top yoke bearing?

To see what it feels like I've assembled the stem and it moves freely but is sluggish like the grease is very high viscosity. Is this normal or should it be free moving with no resistance?

Anyway, this is almost a what not to do post so lets hope it goes better for round two.

Jody.

andrewsmith · 27-01-11, 07:54 AM

New bearing should be lock to lock with little resistance with the front is off the ground.

If your needing the info quickly PM Spanner man or sid as they both know SV's backwards

yorkie_chris · 27-01-11, 04:49 PM

If seal is catching (as they do sometimes) then they will not move free.

Pretty much no resistance, if it is hard to turn it is usually because an idiot has torqued the lot to death.

28-01-11, 12:51 AM

Cheers for the replies guys.

I'll get some more bearings next week and try again.

The headstock is barely hand tight so its not been tightened up too much. Its full of grease which will add a bit of resistance but it doesn't feel right to me. Might well be the seal catching too.

Hopefully second time round will be better.

Got a 3 week deadline to get it all back together and running. Wish me luck.

Cheers.

Jody.

Sid Squid · 28-01-11, 08:45 AM

Quote:

Originally Posted by yorkie_chris

If seal is catching (as they do sometimes) then they will not move free.

Pretty much no resistance, if it is hard to turn it is usually because an idiot has torqued the lot to death.

Both true, also if the races aren't in square then the bearing will do odd things.

28-01-11, 09:04 AM

i used a bottom seal on my tapered races and mine works fine ?

26-01-11, 10:38 PM	#1
harry_hyde Guest Posts: n/a	Headstock bearing question Changing the bearings on my SV from ball to taper ones as that's what's in my new frame. Got the races out of the frame ok and got the new ones in. Had some issues with the lower bearing on the stem though. Had to grind the old bearing off and managed not to mangle the seal. Good I thought til I fitted the taper bearing to find it catches. This is despite the bearing not sitting flush on the bottom of the stem which is another issue. Only fitted the seal as the race I got was without a seal. I went off the part numbers for the ones I took out of the new frame. Have now read on here that the seal doesn't go back on when you fit taper roller bearings. Out with the grinder again for me. Good job I met a man today from SKF who offered me a good deal on bearings. When I get the new taper bearings I've read that I need the ones with the integral seal as I'm guessing otherwise the grease leaks out the bottom? What do I do for the top yoke bearing? To see what it feels like I've assembled the stem and it moves freely but is sluggish like the grease is very high viscosity. Is this normal or should it be free moving with no resistance? Anyway, this is almost a what not to do post so lets hope it goes better for round two. Jody.

27-01-11, 07:54 AM	#2
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: Headstock bearing question New bearing should be lock to lock with little resistance with the front is off the ground. If your needing the info quickly PM Spanner man or sid as they both know SV's backwards __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

27-01-11, 04:49 PM	#3
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Headstock bearing question If seal is catching (as they do sometimes) then they will not move free. Pretty much no resistance, if it is hard to turn it is usually because an idiot has torqued the lot to death. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

28-01-11, 12:51 AM	#4
harry_hyde Guest Posts: n/a	Re: Headstock bearing question Cheers for the replies guys. I'll get some more bearings next week and try again. The headstock is barely hand tight so its not been tightened up too much. Its full of grease which will add a bit of resistance but it doesn't feel right to me. Might well be the seal catching too. Hopefully second time round will be better. Got a 3 week deadline to get it all back together and running. Wish me luck. Cheers. Jody.

28-01-11, 09:04 AM	#6
barwel1992 Guest Posts: n/a	Re: Headstock bearing question i used a bottom seal on my tapered races and mine works fine ?

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