| Ducati TT1, Ducati TT2 and Ducati 750 F1 Forum http://ducatittandf1.com/ |
|
| Swingarm needle bearing conversion http://ducatittandf1.com/viewtopic.php?f=25&t=10950 |
Page 1 of 1 |
| Author: | DarmahDave [ Tue Sep 09, 2014 8:57 pm ] |
| Post subject: | Swingarm needle bearing conversion |
So I am getting my new 650 engine ready for an upcoming track day. The bronze swingarm bushings are in decent shape, but as long as the engine is on the bench it might be a good time to do a needle bearing conversion. I have read in the DIOC newsletters about a conversion that Dr. Desmo came up with. It involved machining a new swingarm pin and actually installing the needle bearings in the swingarm itself. Is this the only option, or is it possible to just replace the bronze bushings themselves and press in needle bearings? Thanks Dave |
|
| Author: | 618F1 [ Wed Sep 10, 2014 10:59 am ] |
| Post subject: | Re: Swingarm needle bearing conversion |
Well, I will chime in: Sounds like a lot of effort for little gain. It seems few bother to do this, and I've never read of the TTs needing it (needle bearings). MikeV |
|
| Author: | DarmahDave [ Thu Sep 11, 2014 4:21 pm ] |
| Post subject: | Re: Swingarm needle bearing conversion |
Thanks for the reply. I had heard from a parts supplier that I should not bother with the bronze bushings and go with the needle bearings. I will stick with the bushings and just make sure that I keep an eye on wear. Dave |
|
| Author: | 618F1 [ Thu Sep 11, 2014 9:53 pm ] |
| Post subject: | Re: Swingarm needle bearing conversion |
I am sure the supplier of the needle bearings was willing to let you go to the effort. Many pantah-based engines are running around decades later, without apparent problems. But, who knows, maybe we will all fly off into the weeds some days after a mass bushing failure. MikeV |
|
| Author: | DarmahDave [ Mon Nov 10, 2014 11:32 pm ] |
| Post subject: | Re: Swingarm needle bearing conversion |
So I have decided against the needle bearings, but while the engine is out for performance upgrades I want to install new plain bronze bearings. Where do you guys get replacement bearings from? Are the original pantah units still available? 750 sport bearings? Or can I just go to a reputable bearing dealer and he can fix me up? Thanks Dave |
|
| Author: | fmcd92 [ Tue Nov 11, 2014 9:34 am ] |
| Post subject: | Re: Swingarm needle bearing conversion |
Up here in snowmobile country we're obliged to make our own which is actually not difficult. Cant be done that I know of without splitting cases which may be why the factory used to supply oversize pins, far easier to accommodate. I realise bushes is bushes but they do need line boring after installation for alignment. Pins are relatively soft so not difficult to replicate to your required dia. |
|
| Author: | wdietz186 [ Tue Nov 11, 2014 10:41 pm ] |
| Post subject: | Re: Swingarm needle bearing conversion |
As Fran said the bushings will need to be sized after they are installed. If you don't have excessive wear I'd leave them alone. A little side play really won't affect the handling to a noticeable degree. |
|
| Page 1 of 1 | All times are UTC - 5 hours [ DST ] |
| Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/ |
|