|
|
Post by christer on Oct 15, 2006 7:08:07 GMT -5
Hi guys and dolls! Very much unlike many of you. I'm rebuilding a '78 SR, on a tight budget. This bike will be my everyday ride during the "warmer" months in Norway. I will certainly build another one when this is finished. Use longer time and more money. Being used to BSA's working on the SR is heaven. Have made a web site to record the rebuild: home.online.no/~cfolkeI would be very thankful if you send me pictures of your SR, so I can post it on my site!!!!  Several forum members have done this already. Christer |
|
|
|
Post by hopwheels on Oct 15, 2006 9:35:51 GMT -5
Christer, you're site is really coming along nicely! Great stuff!
Gary
Hopwheels
|
|
|
|
Post by christer on Nov 20, 2006 15:31:22 GMT -5
Finally! Stuck swing arm pivot finally out. No way I am going to buy this assembly new and refit it. NO! Old fashioned bronze bushings and a new pivot must be fabricated. Few hours over the lathe ahead. And of course...fit a grease nipple. Click on small image on the website to see the horror big size: home.online.no/~cfolke/chassis.htmlRide on Christer ;D |
|
|
|
Post by hopwheels on Nov 20, 2006 15:43:22 GMT -5
Yeeeks christer! That's one ugly pivot.
|
|
|
|
Post by wizz954 on Nov 21, 2006 4:37:49 GMT -5
I've had my swingarm pivot shaft (the threaded rod) snap and as a result I took the whole lot out and found a few things that might help you.
First I just need to clarify the part names as I understand it so we don't get confused. The pivot shaft is the threaded rod that goes right through the frame and has a large nut holding each side. This rod has a diameter of 16mm. The swingarm bush is the long tube that you see in your picture and this tube runs inside the roller bearings. The pivot shaft slides inside the swingarm bush.
I bought a swingarm bearing kit on eBay and it was a different design to the genuine Yamaha stuff and none of the parts are interchangable (flat bearings and swingarm bush). That would not be a bad thing, but the swingarm bush was manufactured to poor tolerances, with excessive play between the pivot shaft and the swingarm bush. The end result was a sloppy swingarm amd kinda defeats the object of replacing swingarm bearings. Moral of this story is stick to genuine parts or fabricate your own.
I think you have the right idea, making bronze bushes but there is also a new development from Yamaha that will help. I recommend you buy a new pivot shaft from Yamaha. The new version of the pivot shaft from Yamaha now has holes drilled into the pivot shaft and these are threaded so you can fit grease nipples into each side and pump grease between the pivot shaft and the swingarm bush and the thrust bearings. Add this to the grease nipple you are going to fit to the swingarm, this should help keep things well greased and avoid any future seizures.
|
|
|
|
Post by christer on Nov 21, 2006 6:17:04 GMT -5
Thank you for input. I am going to fabricate the shaft and bushings myself....... hence the title.....buildup on a budget. Nevertheless, I reckon that this soulution combined with proper greasing facilities will do. I think needle bearings in the swing arm is an over engineered solution, specially when you can't grease the bearings, and that water and dirt finds it's way into it. By fabricating this assembly myself, I will have full control over the tolerances. Will keep you posted. Going to dig out the lathe tonight. Tanks Christer  |
|
|
|
Post by christer on Dec 16, 2006 12:04:35 GMT -5
Hi!!!! Ah...finally some progress. Finally finished fabricating new swing arm shaft and bushings. home.online.no/~cfolke/chassis.html......and a new Mikuni VM 34 has arrived. Now I'm going to paint the frame and start the rebuild. Ride on Christer ;D |
|
|
|
Post by StewRoss on Dec 17, 2006 4:55:07 GMT -5
Hi Christer, Keep up the good work... SR |
|
|
|
Post by christer on Feb 6, 2007 15:55:24 GMT -5
Jeepiii....  My old Jeep Cherokee has stolen quality time from me and my SR build up, but now I've finally started reassembling it. Newly painted frame, and the home brewed swing arm assembly came together real nice. The Jeep also dug a large hole in my SR budget.....doh... 1st of May, the bike will be finished.....? home.online.no/~cfolke/chassis.htmlChrister |
|
|
|
Post by wotavidone on Feb 6, 2007 17:57:49 GMT -5
Looking good Christer, especially for a budget builup. I too like to keep things on a budget. I'm on a yearly salary - it doesn't matter how much overtime I do, there is no extra money, so the only way to get ahead is do as much as possible myself as cheaply as possible. An old bloke trold me once that "how much money you have coming in is only half the battle son, the other half is what you do with it once you get it." The frame looks outstanding, too. Make me feel better, tell me that's an old sheet in the background, and behind that sheet your garage is just as messy as mine Mick |
|
|
|
Post by wotavidone on Feb 6, 2007 17:59:43 GMT -5
PS.
I reckon you could start yourself a little business fabricating bits for bikes. Definitely a tradesman quality job.
Mick
|
|
|
|
Post by christer on Feb 7, 2007 3:22:58 GMT -5
Hi. Thank you for the kind words. Christer |
|
|
|
Post by christer on Feb 12, 2007 16:16:31 GMT -5
|
|
|
|
Post by christer on Mar 22, 2007 17:44:42 GMT -5
|
|
|
|
Post by christer on Jun 13, 2007 16:24:22 GMT -5
|
|
Several forum members have
