The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Bob_Roller on August 28, 2010, 10:17:04 AM
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I had the front tire replaced on the '81 R65 on Thursday, on installation of the wheel assembly, I noticed the center stand is cracked on the left tube, around the weld for the tube that goes between the two leg tubes of the center stand .
Now I've hated this center stand since I got the bike going on 30 years now .
Does anyone know if the '82 model year and later center stands are compatible with an '81 bike ?
This center stand has been repaired four or five times already, if I have to, I'll repair it again, but I am at the point of replacing it .
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Bob, I recently replaced the bastid gawl danged piece of shite centerstand on my '81 with an eBay-scored stand from a 1983 R65.
"New" stand has the dandy foot pad and is oh so pleasant to use. Fits as if it were designed by a real BMW engineer. Not the faux engineer that fabbed the '81 model stands.
If the '82 stand has the foot pad, you're golden.
Monte
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Know if they'll fit on a '79?
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From the pictures in RealOEM, it shows the same center stand for all of the R65's, the LS version as well, so from that, I can't tell for sure .
I checked Motobins, they have a center stand for '82 and up R65's, looks like the one I have on my '81 .
Motobins part number : 91506 .
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Know if they'll fit on a '79?
Unless the chassis is different from the 81's and up -and I don't believe they are- it ought to fit.
Should you decide to take the plunge, Rob, I'll try to take some measurements for you if you think it might be helpful. I also have a 1983 R65. It has the same chassis dimensions as my 81. Of course, that's not too helpful for you right now...
Monte
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Last summer I put a later-model stand on my '81, and I love it. (BTW, I was under the impression that BMW changed the center stand design for the '83 and later models, not the '82. Am I mistaken?)
The only installation hassle I had was the return springs — the later-model stand requires springs that are about 1 cm shorter than those for the '81 and earlier. The parts dept at Bob's could not find a reliable part # for the springs you'll need, so it's something of a poke-and-hope proposition. Somewhere in all these center stand message threads is a message I posted within the past year or so, listing the lengths of each spring. My brain's mush tonight, and I can't find it, unfortunately.
Replace the old center stand. You won't regret it. JT
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The center stand broke this morning when I took the bike off of it going to work .
Couldn't get the remains of the stand retracted, finally it complied with my wishes, only problem, without the left part of the stand, the center stand retracted too far and contacted the clutch arm at the back end of the transmission .
Looked on eBay this morning, found a center stand from an '83 R65 .
Should be here Friday of next week .
I'm glad that piece of crap center stand is finally gone !!!!!!!!!!!!!!!!!
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Bob, after fitting the '83 mod centerstand, you'll wonder why you didn't replace the hernia inducing '81 model stand long before now. I r-e-a-l-l-y like it.
Monte
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Bob
Any chance you will be able to measure the differences between these stands ?
My 79 goes much too far over centre so I've just taken it off for welding of the end stops to see if I can correct the angle to something more vertical.
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Bob, after fitting the '83 mod centerstand, you'll wonder why you didn't replace the hernia inducing '81 model stand long before now. I r-e-a-l-l-y like it.
Monte
You guys need to work out more. Or give me a later stand for free, as I'm not buying one until mine breaks.
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Any chance of a photo comparing them so we can see the difference.
Lou
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Bob, after fitting the '83 mod centerstand, you'll wonder why you didn't replace the hernia inducing '81 model stand long before now. I r-e-a-l-l-y like it.
Monte
You guys need to work out more. Or give me a later stand for free, as I'm not buying one until mine breaks.
Ed, I really was suffering with the old stand... in spite of being on a regular running and exercise program. Only way I can enjoy my adult beverages and maintain 153 pounds for the last fifteen years.
When I recently installed new, stock length 13-inch Hagon shocks, I discovered the too stiff Progressive shocks were actually 12.25 inch length! So I was doing an almost dead lift of 450+ pounds just to get the scooter stand over TDC. That effort became part of my Phys Ed routine. ;D
Monte I'll take easy anytime Miller
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Only way I can enjoy my adult beverages and maintain 153 pounds for the last fifteen years.
Living in a metric world an wondering how heavy 153 pounds was I tried entering my own weight and came up with 297.3pounds.
Thats nearly double.
Does that make me twice the person ? :)
Hmmm time to start doing something about that methinks
John
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153 pounds isn't heavy, unless my cousin is only about 4 feet tall. It's 454g/lb, so he's a bit over 69 kg. I'm 175 pounds if I lift weights and eat enough protein. ...and consume adult beverages....
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Yes Bob, pictures would be great. Mine has not broken yet but probably just a matter of time. Most importantly, I am wondering if the 81 version can be modified to operate like the 83 model. There's nothing like a preemptive strike. I have a welder and I am not afraid to use it!
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Got the center stand today, it was waiting for me at the front door courtesy of FedEx .
Got it installed, a few minor problems, the holes that the spacers that the center stand rides on needed to be chamfered to fit the lip on the spacers .
As altritter mentioned the springs are now about 1cm too short, the loops that are welded to the new stand are about 1 cm longer than the the ones on the old stand .
I'll take the bike into work on Saturday, remove the springs cut them with a high speed die grinder, then pull out one coil of the spring, that should shorten it to the correct length .
Other problem, the old stand had rubber plugs in the tube ends, the left one contacted the frame and acted like the 'up stop' for the stand .
The new stand has a ridged foot plate you step on the raise the bike on the stand no rubber stop .
I looked at the '84 LS, it has the same stand, on the LS there is a tab of sheet metal welded to the frame tube around where the left foot peg bolts through, there is a hole in the tab, and a rubber stop is attached through it .
So it looks like I can fabricate a bracket and use the bolt that holds the left foot peg on, it has about an inch of thread protruding through the nut, should be able to put the bracket on the bolt and add another nut to secure it .
The center stands are identical dimension wise .
What a difference the new stand makes .
If I had known it would work this well, I would have replaced it before I made the first welded repair on it 20 years ago !!!!!!!!!!!
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What a difference the new stand makes .
Bob
What do you attribute the improvement to if the dimensions are the same ?
I've got the end stops on my stand built up with weld and I'm at the trial fitting stage, grinding back a little more each time until the stand position seems right. Currently it's too upright and far too easy to push off the stand and therefore not safe. Easy does it with the angle grinder from now on I think.
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The ridged foot plate that takes the place of the 'tang' that was welded to the other original stand .
You are actually stepping on the end of the center stand tube, instead of 3-4 inches (8-10 cm) farther up the tube with the 'old' style center stand .
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Right, maybe I should think about welding a plate weld on while I've got the stand off.
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Just got home from work, moved the R65 to the front of the garage so I don't have to move bikes around tomorrow morning at o'dark thirty .
Took a good look at the center stand .
With the bike on the center stand, the plate welded to the end of the the tube, is about at a 45 degree angle to the ground with the top forward .
The plate is about 1.75 inches wide and about 2 inches long with the 90 degree corners snipped off .
The plate material looks to be around 3-4 mm thick .
The bottom edge of the plate is just lower than the tube, just enough to get a couple of good welding beads on there .
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Thanks for the description Bob.
With the bike on your new stand which wheel is in the air ?
Mine used to be the back. Now its the front although I'm still grinding away at the end stops a bit at a time. It's gradually getting more stable but I think I should keep going until it sits on the back wheel or at least needs more of a shove to roll it off the stand.
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The front tire is off of the ground .
The contact points on the frame are quite worn as well .
Bike doesn't need much effort to get it off of the stand .
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Bike doesn't need much effort to get it off of the stand .
Mine, also. Since there's no free lunch, the payback is that it takes a bit more of "step-and-tug" to get the bike onto the stand. But that I can live with, and it has not been a problem.
Having the front wheel off the ground when on the stand is really nice, but I can't be complacent. On the stand, the bike's weight is almost perfectly balanced. It takes very little pressure to rotate the bike on the axis of the stand, putting the front tire on the ground. (A full tank of fuel puts the bike right at the point of equilibrium.) Therefore, relying on parking in gear to stabilize the bike on the center stand is unsafe if the bike is pointed down even the slightest slope. If there's no other way to orient the bike, I use the Brown's side stand with the bike in first gear and accept the risk of an "airhead smokescreen" from the left pipe on startup.
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You are actually stepping on the end of the center stand tube, instead of 3-4 inches (8-10 cm) farther up the tube with the 'old' style center stand .
Correct. Moreover, with my old stand on the '81, I got much less rotational force from stepping down on the stand, because most of the force generated by my weight was going straight into the ground. (I suspect that the stepdown might have generated a slight counter-rotational force as well.) The foot plate on the later-model stand is far enough off-axis to generate force on the stand itself to aid the rotational force generated by tugging the hand grip and mid point of the handlebar to the rear. Much more efficient.