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Twinpot Brake upgrade on 78 Skunk
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13969
- London, UK to Redondo Beach, California
Got it. Will send them early next week.1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/
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Jamie
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RustyStuff
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Originally posted by RustyStuff View PostDo the brackets fit the Single brake GS450's?
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Originally posted by bwanna View PostI have one on my 82 gs450 and it works very well
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bwanna
Originally posted by tkent02 View PostDid you find that 450 needed better braking? I'm just curious, mine seems very good just pushing it around, rolling it down a hill and trying the brakes, but I haven't ridden it yet.
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Salty,
Do you know if anyone has had any issues with the CBR900RR rotors - the center bore on these rotors is 62mm - larger than the stock hub bore.
This will cause the rotor to no longer be hub-centric.
These are the rotors I purchased:
Last edited by philosopheriam; 05-27-2014, 08:36 PM.Cogito ergo sum - "I think, therefore I am"
René Descartes
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13969
- London, UK to Redondo Beach, California
The bolts are shoulder bolts & as stated above appear to hold everything in place just fine.
We are going up from M6 to M8 on the bolts for a start & the forces are around the axle not across the hub so the bolts take all the forces whether the rotor is tight to the hub or not...
Many people on here with lots of miles on this upgrade. As ever fit at your own risk, if you are not confident you can send them back to me no problem.
1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/
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Salty,
I did not mean to cast aspersions on your work - I was simply concerned with the possibility of radial runout.
I suppose the key here is to make sure that the bolt holes are drilled/enlarged correctly and proper torque is applied to the rotor bolts.
Also, you mentioned something else which is important - the stock bolts have a shoulder on them, and thus, the shear surface is distributed on the shoulder, not the threads.Cogito ergo sum - "I think, therefore I am"
René Descartes
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Forum LongTimerGSResource Superstar
Past Site Supporter- Oct 2006
- 13969
- London, UK to Redondo Beach, California
No problem & no offence taken, response not meant to sound defensive just honest.
The key is:
1. Make sure the rotor spacer is fixed centrally to the rotor when you drill the holes.
2. Drill the holes straight & true to size.
In honesty I have measured these & I have also drilled some I've used personally where I have "eyeballed" it & then put a hand drill through. No problems experienced either way. I have a reasonably calibrated eye. There is some room in the caliper for minimal run-out at the edge so although not ideal I don't think it would cause too many problems. I usually balance the wheel with the rotors fitted (although again I suspect it would have minimal effect that close to the hub).
For sure the shoulder bolts are important. All rotor bolts I've seen to date have some kind of shoulder - presumably because that takes the torque on the rotor when the brake is applied.
Last edited by salty_monk; 05-28-2014, 04:49 AM.1980 GS1000G - Sold
1978 GS1000E - Finished!
1980 GS550E - Fixed & given to a friend
1983 GS750ES Special - Sold
2009 KLR 650 - Sold - gone to TX!
1982 GS1100G - Rebuilt and finished. - Sold
2009 TE610 - Dual Sporting around dreaming of Dakar..... - FOR SALE!
www.parasiticsanalytics.com
TWINPOT BRAKE UPGRADE LINKY: http://www.thegsresources.com/_forum...e-on-78-Skunk/
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