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Old 06-23-2008, 08:51 PM   #46
squish
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Joined: Dec 2003
Location: Where the Ghetto meets the sea.
Oddometer: 5,650
Yet another happy customer.

I just got the shaft into the bike.
After getting some tips and tricks from fellow inmates seems my swing-arm to shaft fit was very tight.

But Guy went out of his way to make sure it's ok.
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Old 07-03-2008, 01:21 PM   #47
ridepjride
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Location: Northern California
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Another Satisfied Customer

Put your shaft in the bike and rode to Montana, about 3k round trip. The old shaft was out of phase by about 10 degrees, and I sent it to you for a replacement. Prompt receipt, no problems at all. Nice to know I can grease the u-joints once a year along with the spline lube, and replace them when they do wear out.
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Old 08-24-2008, 01:50 PM   #48
rkjjeep
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Location: Ann Arbor, MI
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need to machine swingarm

others installing serviceable joints require swingarm machining. Does this joint require any grinding on the inside of the swingarm to fit? thanks
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Old 08-25-2008, 08:21 AM   #49
HPMGuy OP
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Quote:
Originally Posted by rkjjeep
others installing serviceable joints require swingarm machining. Does this joint require any grinding on the inside of the swingarm to fit? thanks
No, it will not require any grinding/modification to the swingarm. A few customers have reported snug fits, but a little bit of wiggling in the right spot has allowed the shafts to pass through without modification. The swingarm is a casting, so some variance in dimension is expected, but the overwhelming majority will not have any issues, and will find the shaft will slip through just like the original.
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Old 09-28-2008, 05:16 PM   #50
Matt the Wanderer
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Balancing?

I see the units have been modified significantly from the stock condition with additions of grease fittings and some welding, so it seems reasonable to wonder if they are still balanced. I doubt that you would be able to feel an out of balance condition over the Airhead's shaking, but the bearings would certainly know the difference and wear out sooner.

Fine looking craftsmanship, btw.
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Old 10-07-2008, 08:26 AM   #51
HPMGuy OP
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I do not balance the shafts...I do not believe it is necessary, but I regularly have customers remark on the reduction of vibration they notice after installing a rebuilt shaft, and the reason is that BMW staked in the u-joints, and were very inaccurate in how they went about it. Sometimes the joints are staked .02-.03" off center in the yoke....now this will cause vibration(not even mentioning the installation tolerances on the stock damper.) When adapting the yokes to use circlips, I correct these errors, and when done the joints are installed within a few thousandths of direct center.


Quote:
Originally Posted by bumblebike
I see the units have been modified significantly from the stock condition with additions of grease fittings and some welding, so it seems reasonable to wonder if they are still balanced. I doubt that you would be able to feel an out of balance condition over the Airhead's shaking, but the bearings would certainly know the difference and wear out sooner.

Fine looking craftsmanship, btw.
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Old 10-24-2008, 02:46 PM   #52
SOLO LOBO
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Joined: Mar 2004
Location: Shoreline, WA
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Repeat customer here... sold my R100GS and replaced it with a 1981 R80G/S... sadly the u-joint was notchy and tight...

So, as of a few days ago my G/S driver shaft is headed down to Guy to have the u-joint replaced.

Thanks for offering this great service Guy!
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your bike is suitably dirty. Well done.
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Old 11-10-2008, 08:19 AM   #53
bmwblake
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do you still have a core that i can use while i send mine in for work?
i'm thinking about heading this off at the pass while i have the cash.
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Old 11-10-2008, 09:06 AM   #54
HPMGuy OP
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Yes, I still offer the exchange service, though I don't have any cores ready to ship at this moment. If you want to do an exchange, I will get a spare in the works, let you know when it is ready, then ship your exchange unit.

Quote:
Originally Posted by bmwblake
do you still have a core that i can use while i send mine in for work?
i'm thinking about heading this off at the pass while i have the cash.
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Old 11-26-2008, 07:07 PM   #55
Milagro
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Hi HPM Guy,

Do you offer simple u-joint replacement for the old style driveshafts (R75/6?).

Thanks,

Steffan
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Old 11-29-2008, 04:32 PM   #56
HPMGuy OP
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Hello Steffan,

Yes, I do offer joint replacement for the early shafts. Cost is $170 + shipping.


Thank you for your interest,
Guy

Quote:
Originally Posted by Milagro
Hi HPM Guy,

Do you offer simple u-joint replacement for the old style driveshafts (R75/6?).

Thanks,

Steffan
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Old 12-01-2008, 01:01 PM   #57
bmwblake
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get a spare in the works. i'm pulling a pre-emptive strike on the driveshaft.


Quote:
Originally Posted by HPMGuy
Yes, I still offer the exchange service, though I don't have any cores ready to ship at this moment. If you want to do an exchange, I will get a spare in the works, let you know when it is ready, then ship your exchange unit.
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Old 12-02-2008, 07:01 AM   #58
gildo
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Any photographs of the shaft

Again, well done Guy for coming up with this service!
This is the mod I have been waiting for for some time, having gone through 2 drive shafts (one of which took out the housing as well!!, expensive!)

I'd like to see some pictures of the re-manufactured shaft if possible (can't see the ones on your initial message for some reason).

Also, what is the benefit of reduced damping for the 'intermediate' and off-road biassed urethane damper (I assume I would not actually feel the more 'direct' drive, as you mentioned to an earlier message)

Thanks
G
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Old 12-02-2008, 09:55 AM   #59
HPMGuy OP
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I am building up a batch of cores this week, one will be waiting....

Quote:
Originally Posted by bmwblake
get a spare in the works. i'm pulling a pre-emptive strike on the driveshaft.
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Old 12-02-2008, 10:01 AM   #60
HPMGuy OP
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Hello G,

Thanks!

I now only offer two types of damper options, standard and heavy duty (used to be intermediate), I have eliminated the off-road. I recommend the standard to everyone unless they are using the bike in an unusual way (very hard), the heavy duty damper uses a higher durometer damper, which is much stronger than the standard, but loses some of its ability to absorb shock.....so more will pass through the drivetrain.

I will respond to your email with a pic.

Thank you for your interest,
Guy



Quote:
Originally Posted by gildo
Again, well done Guy for coming up with this service!
This is the mod I have been waiting for for some time, having gone through 2 drive shafts (one of which took out the housing as well!!, expensive!)

I'd like to see some pictures of the re-manufactured shaft if possible (can't see the ones on your initial message for some reason).

Also, what is the benefit of reduced damping for the 'intermediate' and off-road biassed urethane damper (I assume I would not actually feel the more 'direct' drive, as you mentioned to an earlier message)

Thanks
G
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