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Author Topic: R80 gs rebuild  (Read 10599 times)

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Offline MellowJo

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Re: R80 gs rebuild
« Reply #80 on: March 31, 2017, 10:36:31 am »
As far as I know the 1100/50GS swing arm cannot work on the older G/S frames. Only on the GS frames. Also the 1100/50GS swing arms has the shock fitment on a different place so the donor frame needs to be customised for this to work. Have a look at Rocketeers build of the HPZA. There you will be able to see the mods he did quite easily.
Tx Scalpel, it was Rocketeer's vs Flex's builds that made me wonder. To me the top shock mount is less of a "risky" mod than the extension of an original swingarm.

Am I correct that the 1100GS swingarm is longer and therefore more desirable that the 1150GS swingarm for this ....?
« Last Edit: March 31, 2017, 10:50:06 am by MellowJo »
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Offline Scalpel

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Re: R80 gs rebuild
« Reply #81 on: March 31, 2017, 10:47:01 am »
You are indeed correct. If you have a look on the HPN website (www.hpn.de) you will see the different models they have and also the different swing arms they use on these bikes. Have a look at this diagram. This will also explain the method in the madness.

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Offline Poffmuis

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Re: R80 gs rebuild
« Reply #82 on: March 31, 2017, 01:29:28 pm »
There is quite a comfort difference in the standard extended vs R1100xx swingarm. Due to the single pivot joint of the extended swinarm there is quite a torque effect on the shaft that causes a the bike to lift. Essentially the shaft is pushing the rear wheel down and "firming" up the suspension.
The double joint and torque arm on the R1100xx swing arm minimizes this effect somewhat and creates a more comfy ride.
The downside on the R1100xx is probably the massive unsprung weight of all that driveshaft, swingarm, disk brakes etc, which means that offroad performance between the 2 is probably not that different.

Where I found the torque lift effect to be really handy is it provides really nice traction on technical rocky ascents as it keeps the wheel planted.
 
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Offline flex

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Re: R80 gs rebuild
« Reply #83 on: April 01, 2017, 10:29:57 am »
Pietas, jo slim kind!  ;)
So, can you do the diode trick & have the charge light working as well?

On the swing arm - some good info  :thumleft:
I did not put in all the detail of the mods on mine & had IanB assist me with the mod. Done pretty thoroughly on the lengthening of both the casing & drive shaft.
As you say, if its not it will be a weak point.
The travel on the rear wheel improves - simply because the wheel is further away. This calls for different rear suspension travel & positioning. In short should improve treacking (especially at higher speeds) off road.  ::)
It does make the bike a bit taller - depending on how much you chose to lengthen by.
You need to consider what to do up front with the suspension to cater for the raised rear as well.
At the end of the day, best to go for something that has been tested & proven because the geometry of the bike is altered. Part of the reason I only did the 50mm upgrade. There is quite a bit of technical info available to read through if you are interested.

On another score - I got my motor back from Doug Mac yesterday & have decided to pull the plug in trying to get ready for the gathering ........  :crybaby2:
I might be finished in time but, reluctant to hit the road with a bike that hasn't been "run in" sufficiently. Especially as this is a complete rebuild.  :P
So, next year ........ enjoy!  :thumleft:
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Offline flex

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Re: R80 gs rebuild
« Reply #84 on: April 01, 2017, 10:34:19 am »
Great table Scalpel, only saw it now.  :thumleft:
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Offline 1ougat

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Re: R80 gs rebuild
« Reply #85 on: April 01, 2017, 11:22:25 am »
Good show :thumleft:
Make mine a Boxer with a shaft!!!!
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Offline flex

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Re: R80 gs rebuild
« Reply #86 on: April 06, 2017, 09:46:45 am »
So I got my motor back  :thumleft:
Cranked over - oil coming out of all the right spots ... :3some:
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Offline flex

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Re: R80 gs rebuild
« Reply #87 on: April 06, 2017, 09:48:52 am »
Man this is just too good.
So the last time I posted a pic of my badly rusted battery box and some time later of the broken bean can plug .... and .... today in Postnet I get the followong from Dave.  ;D
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Offline flex

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Re: R80 gs rebuild
« Reply #88 on: April 06, 2017, 09:53:30 am »
Dave the "Rocketeer" - you are a star bud - thanks very much.
As I am not going to make it, I will get IanB to carry down the best opint of mead money can buy  ;D
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Offline flex

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Re: R80 gs rebuild
« Reply #89 on: April 06, 2017, 09:55:12 am »
How much can I pay you Dave?
"Nada, nutting, niks nie!"
What can I say :thumleft:
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Offline SparkMark

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Re: R80 gs rebuild
« Reply #90 on: May 17, 2017, 11:55:37 am »
Flex ... whats happening with the build ... its been too quite  :biggrin:
 

Offline flex

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Re: R80 gs rebuild
« Reply #91 on: May 17, 2017, 12:55:40 pm »
So bummed at missing the gathering that I crashed into depression & feeling very sorry for myself....... :-(
IanB got back from holiday yesterday & I was dreadding his call - so, he called this morning & reved me up good...
So, now I am going to lift the sheet & pick up some spanners asap .......
Update coming soon.
Still undecided about what to do with my freshly blaster hubs & final drive etc.
Should I clearcoat or not.......
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Offline zacapa

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Re: R80 gs rebuild
« Reply #92 on: May 17, 2017, 09:21:52 pm »
Good to hear you are back getting motivated for the G/S challenge 2018  :thumleft: Your G/S will be left with plenty time to get the planning done for the next one.
Clear coat on aluminium parts no ways in my opinion. Just keeping the parts clean from time to time should work well. Especially with a German boxer twin. The
castings are good quality with a rough kind of finish on the main parts so don't require much to keep 'em looking good. The rest can be blinged for the right parts.
Keep it simple and honest with a touch of the right stuff. Still looking for that too..... It seems elusive to find it at times  O0

G/S looks nice with a flat/satin finish to the frame - same for aluminium castings - and shiny stuff for the rest. I guess it depends on how the bead blasting was
done but I advise against any overcoating of aluminium parts so as not to create a future maintenance item.

If you need some satin black - what has worked well for me is the Duram NS range of paints (NS4? or NS5?) the solvent based one preferably. Can be brushed
with good results - I use it mostly on fork stanchions, frames and so on.
« Last Edit: May 17, 2017, 09:39:02 pm by zacapa »
 

Offline flex

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Re: R80 gs rebuild
« Reply #93 on: May 18, 2017, 11:38:18 am »
Thanks Zacapa,
Zacapa the Spanish (is that correct?) name for a very high quality Rum..... :-)   :-)

Ron Zacapa XO rum - rated #280 of 5085 rums: see 356 reviews, photos, other Ron Zacapa rums, and similar Aged rums from Guatemala
Confirmed - I googled it .......... ;-)

Ok, ok I'll stay clear on the aluminium. Its just the old coastal thing - EVERYTHING oxidises......
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Re: R80 gs rebuild
« Reply #94 on: May 25, 2017, 06:49:20 pm »
Good to hear you are back getting motivated for the G/S challenge 2018  :thumleft: Your G/S will be left with plenty time to get the planning done for the next one.
Clear coat on aluminium parts no ways in my opinion. Just keeping the parts clean from time to time should work well. Especially with a German boxer twin. The
castings are good quality with a rough kind of finish on the main parts so don't require much to keep 'em looking good. The rest can be blinged for the right parts.
Keep it simple and honest with a touch of the right stuff. Still looking for that too..... It seems elusive to find it at times  O0

G/S looks nice with a flat/satin finish to the frame - same for aluminium castings - and shiny stuff for the rest. I guess it depends on how the bead blasting was
done but I advise against any overcoating of aluminium parts so as not to create a future maintenance item.

If you need some satin black - what has worked well for me is the Duram NS range of paints (NS4? or NS5?) the solvent based one preferably. Can be brushed
with good results - I use it mostly on fork stanchions, frames and so on.

Nice job so far :thumleft:
A mate of mine had some aluminium cylinder heads blasted with some kind of plastic bead that polishes the surface and leaves a protective layer to guard against oxidization. I'll follow up and see what I can find out.
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Offline billy-joe

Re: R80 gs rebuild
« Reply #95 on: June 14, 2017, 02:19:43 pm »
any progress here?
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Offline flex

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Re: R80 gs rebuild
« Reply #96 on: November 14, 2017, 08:27:43 am »
Some progress pics in the next day or two gents - I'mbacl on it .......  :peepwall:
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Offline flex

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Re: R80 gs rebuild
« Reply #97 on: January 04, 2018, 01:32:17 pm »
Dave, thanks bud.
Herewqith the reworked batt box.  :thumleft:
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Offline flex

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Re: R80 gs rebuild
« Reply #98 on: January 04, 2018, 03:53:26 pm »
Blooming internet link is so slow I cant get the pics to upload  :eek7: - more tomorrow.  :3some:
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Offline flex

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Re: R80 gs rebuild
« Reply #99 on: January 05, 2018, 10:55:07 am »
Putting the final drive in.
Short of hands.......
New bearings - flat sealed bearings, quite expensive ......  :P
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