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who rebuilds airhead transmissions?
- Thread starter Roguetek
- Start date
ISAMEMON
Grammarian no, Rider yes
oak, tom , steve prokov, do a search
expect to pay 500+ to do it right
my 85 he ( steve) replaced all seals, machined the shaft for the circlip, replaced all bearings, supplied ( but not installed) new netural switch, and a list of all tolerences before and after, ran me 675 2years ago
expect to pay 500+ to do it right
my 85 he ( steve) replaced all seals, machined the shaft for the circlip, replaced all bearings, supplied ( but not installed) new netural switch, and a list of all tolerences before and after, ran me 675 2years ago
F
From MARS
Guest
I had mine rebuilt by Anton Largiader in Virginia. He did the circlip, seals, bearings, and some other stuff for $615. I've put about 8000 miles on it since rebuild with no problems. This is his website: http://www.largiader.com/
Tom
Tom
lkchris
Active member
Matt Parkhouse in Colorado Springs is closest to you.
hobomatt@aol.com
719.636.3633
Since you're in OK City, you should be a member of the OK Airheads.
Former prez John Wood had one done by Matt, IIRC.
http://autos.groups.yahoo.com/group/OKAirheads/
If you feel up to doing the transmission re-build yourself or just want to see what is involved - there is a nice video available from Cycle Works -
http://www.cycleworks.net/index.php?main_page=product_info&cPath=29_35&products_id=243
The video covers both the 4-speed and 5-speed airhead transmissions as used in the /5, /6, and /7 bikes (likely newer as well, but I haven't gone there - yet). I watched the part on rebuilding the 5-speed transmission several times and then jumped in and re-built my /7 R100RS transmission.
I was able to go to Re-Psycle BMW for bearings, seals, and a good used intermediate shaft (damaged engaging dogs on original transmission). I got the parts to upgrade the shift mechanism (sometimes referred to as the "shift kit upgrade"). I was also able to talk to the folks at Re-Psycle about the disassembly / assembly process. Re-Psycle sells re-built transmissions for about half the price of a new unit.
I obtained the shim kit from Cycle Works. I was able to borrow the plate used to make measurements to determine the amount of shimming necessary - the local BMW dealer where I've purchased many bikes loaned me the plate. I've since purchased my own plates for 4-speed and 5-speed transmissions.
My re-built transmission has worked very well. I routinely use Dow Gear Guard M with Valvolene 80W-90 transmission oil for smoother shifting.
In a couple of weeks from now there is going to be a tech day at a fellow airhead's house in Columbus, Ohio. Featured in the tech session will be the re-building of a 4-speed transmission. With the kick starter, the 4-speed transmission is a bit more fiddly than the 5-speed unit. Here is a link to the Airheads.org website with the announcement of the aforementioned tech day -
http://www.airheads.org/component/o...agid,323/year,2010/month,04/day,10/Itemid,40/
http://www.cycleworks.net/index.php?main_page=product_info&cPath=29_35&products_id=243
The video covers both the 4-speed and 5-speed airhead transmissions as used in the /5, /6, and /7 bikes (likely newer as well, but I haven't gone there - yet). I watched the part on rebuilding the 5-speed transmission several times and then jumped in and re-built my /7 R100RS transmission.
I was able to go to Re-Psycle BMW for bearings, seals, and a good used intermediate shaft (damaged engaging dogs on original transmission). I got the parts to upgrade the shift mechanism (sometimes referred to as the "shift kit upgrade"). I was also able to talk to the folks at Re-Psycle about the disassembly / assembly process. Re-Psycle sells re-built transmissions for about half the price of a new unit.
I obtained the shim kit from Cycle Works. I was able to borrow the plate used to make measurements to determine the amount of shimming necessary - the local BMW dealer where I've purchased many bikes loaned me the plate. I've since purchased my own plates for 4-speed and 5-speed transmissions.
My re-built transmission has worked very well. I routinely use Dow Gear Guard M with Valvolene 80W-90 transmission oil for smoother shifting.
In a couple of weeks from now there is going to be a tech day at a fellow airhead's house in Columbus, Ohio. Featured in the tech session will be the re-building of a 4-speed transmission. With the kick starter, the 4-speed transmission is a bit more fiddly than the 5-speed unit. Here is a link to the Airheads.org website with the announcement of the aforementioned tech day -
http://www.airheads.org/component/o...agid,323/year,2010/month,04/day,10/Itemid,40/
OK, I"m looking at trying to rebuild a 77 5 speed. the 3/4 shifter fork rod is sloppy, and has wear, and rust pits. which means it has to be replaced. ( this is the same one that my boss drove out of the case cold... ) So. the case appears to be fine, no cracks, or any signs of damage from my employer's enthusiasm.
I have access to a machine shop, so I'm thinking of making a new 3/4 shifter fork rod from scratch. as far as the case hole not being the right size, I can clean up the hole in the case, and make a new fork rod.
my other thought was to drill and tap a hole in the back of the fork rod, and put a flat bolt in it, to keep it from being able to creep into the case.
thoughts?
or just buy a new case, put all the bits in a box, and ship it to someone who knows what they're doing?
I have access to a machine shop, so I'm thinking of making a new 3/4 shifter fork rod from scratch. as far as the case hole not being the right size, I can clean up the hole in the case, and make a new fork rod.
my other thought was to drill and tap a hole in the back of the fork rod, and put a flat bolt in it, to keep it from being able to creep into the case.
thoughts?
or just buy a new case, put all the bits in a box, and ship it to someone who knows what they're doing?
lbrackr756
Little Egypt Airheads
I concur. I've know Dave for 50 years (yes, we're both that old) and, ahem, I'm the one who introduced him to BMW's in 1975 when he worked for me and I bought a brand-spanking new R60/6. Grass Roots BMW and Dave are highly recommended.
Little Egypt Airheads
1952 R51/3
1966 R50/2
1977 R75/7 - for sale
1980 R100RT
04r1150rs
ONE LESS HARLEY
manicmechanic
ABC,AMA(LIFE),MOA,RA,IBMW
John did the tranny for my /6 very recently and it does so much better than an Airhead trans usually does.
