I cannot feel any play out of my swing arm, I know that most Yamaha 2t twins get there swingarm bearings replaced with the bronze bushings.
I've always thought my old R5 handles pretty damn good for what it is.
How do you guys determine when these bearings need to be replaced?
You'll get side to side play.
I can't imagine any of the original nylon ones are still holding up.
I finally got around to this. I wish I didn't! Got the bushings pressed in. Now the little stubs won't fit.
Should I get the bushings machined? It's like .2mm off. :bang:
Quote from: Czakky on November 19, 2020, 08:33:06 PM
I finally got around to this. I wish I didn't! Got the bushings pressed in. Now the little stubs won't fit.
Should I get the bushings machined? It's like .2mm off. :bang:
If the bushings are fully seated in the swing arm, a long reamer, preferable with a pilot at the other end is an exellent tool to correct the inside diameter. I am sure it can also be done in a good pillar drill, or a milling machine.
Needle roller bearings are the way to go.
Quote from: Dvsrd on November 19, 2020, 09:01:35 PM
Quote from: Czakky on November 19, 2020, 08:33:06 PM
I finally got around to this. I wish I didn't! Got the bushings pressed in. Now the little stubs won't fit.
Should I get the bushings machined? It's like .2mm off. :bang:
If the bushings are fully seated in the swing arm, a long reamer, preferable with a pilot at the other end is an exellent tool to correct the inside diameter. I am sure it can also be done in a good pillar drill, or a milling machine.
I always used an automotive brake wheel cylinder hone to relieve the clearance problem. It doesn't need to be precise, just a good snug fit between the bronze bushing and the steel sleeve. I used an electric drill and probably cutting oil as a lubricant but that was years ago and I can't be sure about that.
Lyn Garland
Quote from: rodneya on November 19, 2020, 10:02:05 PM
Needle roller bearings are the way to go.
+1
I'm in the process of converting all my bikes to needle roller bearing swingarms at the present. I'll get the swingers powder coated after installation of the bearings and some taped threaded rod with appropriate washers/ nuts to seal up the business internals.
Thanks lyn. I'll see what I can find for tiny hones.
Needle bearings would be sweet, but I just need to get this thing back together. I need the space for a 900cc bevel head in my shed.
tbh, bronze bushings will provide more support but be mildly less responsive. Ive never had an issue with good bronze bushings.
why do they provide more support? more contact area. But bearings are sexy. anythings better than the factory plastic sleeves.
7/8" brake hone on its way. I never knew such a thing existed. This place is awesome! :patriot:
Quote from: m in sc on November 20, 2020, 09:57:15 AM
tbh, bronze bushings will provide more support but be mildly less responsive. Ive never had an issue with good bronze bushings.
why do they provide more support? more contact area. But bearings are sexy. anythings better than the factory plastic sleeves.
Bearings are also easier to install
These days I need supportive over sex appeal though... ;D
The needles see way more load to have the same tolerance as a plain bushing.
I'd think larger bearings would be required to generate much if any loss of friction.