Hi All
New member here from Stockton CA. Last summer I bought a R100RS Motorsport (a bike I've always wanted). The bike is in great condition, all major engine work and routine maintenance performed by Ted Porters shop. I've checked the points, changed the plugs,.synced the carbs and changed all fluids. It.s a blast to ride.
With all that going for me I still have one particular problem that I need some help with. That would be getting this thing up on the center stand.
Thanks to my current medical conditions and chemo treatments I've lost a lot of weight but still,I believe that this is more of a mechanical problem than a strength issue.
Rear tire is a 120/90 which is a bit smaller in dia. and isn't helping but it's almost new and I hate to trash it.
I've change the rear spring preload to the middle of three settings hopping to raise the frame a little.
Bushings could be shot (85K miles), Boxer Metal Works has a bushing kit but is temporally out of stock. Looks easy to install but requires removal of the exhaust on both sides as well as a way to support the bike with out the stand (which I don.t have). BTW I hate the stock side stand and most always use the center stand
So, I'm looking for any suggestion to fix this?
Scot
Thanks for the reply. I think I'm using the same procedure you outlined to hoist Big Bertha (weight related pun) up to the center stand, maybe I'm not pushing down hard enough with my foot. I've found that if I roll the rear wheel on to a board about 3/8" thick the bike is easier to get up on the stand but who whant's to carry around a board to park a bike. It appears that the bike frame is too low to the ground or the stand is too tall. Rear shocks are Icon (14")
IIRC the Boxer bushings are larger in outside dia. than stock and requires drilling the holes in the tabs to 1/2" dia. for installation thus the need removed the the exhaust to get a clear shot with a drill.
I had planned to make the tech. day you referenced but that Saturday followed a chemo day on Friday and I wasn't up to the trip. Sorry I missed it. as highway 70 is one of my favorite roads.
I've been ridding my 1994 K75S for the last 8 years and getting used to an airhead again is quite an experience. Kind of like comparing a Massey Ferguson to a Ferrari.
Thanks for your offer to help. If I can't get this sorted out on my own I may take you up on your offer. :S
On another note I'm still running points and have been considering going to an electronic ignition ie Dyna III any experience with these or other make you might suggest?
On another note I'm still running points and have been considering going to an electronic ignition ie Dyna III any experience with these or other make you might suggest?
I installed a Boyer on my 1979 RS and have been very happy. The installation instructions were exceedingly clear. Installation took me about 3 hours because I have one of the "points in a can" models which requires more disassembly. All the wire lengths were correct and it fit like a glove.
One Note: Whatever EI you install, you'll need to have a strobe timing light. That's not a suggestion, you absolutely MUST have one to set the timing. Many people confuse this. The "static setting" detailed in the instructions simply allows the bike to crank so that a strobe lamp can be employed to finish the job.
Hope this helps.
Owning an old Airhead is easy.
Keeping an old Airhead running great is the true test.
In a previous post I noted the rear shocks on my 1978 R100RS as Icon (14")
Actually they are Icon but 13" (330 mm) in lieu of the 14" noted. Just wandering if they may be a little short. Does anyone know what the stock BMW pin-pin dimension should be?
Also the diameter of the stock rear tire @ 4.00 X18 vs. 120/90 X18 Metzler marathon. This info used to be published by the tire manufactures but currently can't find. I suspect that lower profile tire dia, and possibly a shorter shock could be aggravating the situation of hoisting the bike to the center stand position. Just trying to sort out the obvious first berore making modifications. Any help/input would be appreciated.
In a previous post I noted the rear shocks on my 1978 R100RS as Icon (14")
Actually they are Icon but 13" (330 mm) in lieu of the 14" noted. Just wandering if they may be a little short. Does anyone know what the stock BMW pin-pin dimension should be?
My 1979 R100 RT is 340mm.
Also the diameter of the stock rear tire @ 4.00 X18 vs. 120/90 X18 Metzler marathon. This info used to be published by the tire manufactures but currently can't find. I suspect that lower profile tire dia, and possibly a shorter shock could be aggravating the situation of hoisting the bike to the center stand position. Just trying to sort out the obvious first berore making modifications. Any help/input would be appreciated.
I'd like to know that myself. Either diameter or circumference. It's my suspicion that the metric sized tires may be the same width, but are smaller circumference. This can affect the gearing, speedometer, and center stand action.
Owning an old Airhead is easy.
Keeping an old Airhead running great is the true test.
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