A friend of mine wanted to renew his roller on Doc Humphries Vibration Damper
Unfortunately Doc Humphries is no longer trading
He did see if he could fit Lamonster larger roller to it but was advised it wasn’t suitable
He has found a replacement and posted this on our UK Spyder Website Facebook page
As this information may be useful to others with Doc Humphries Vibration Damper he has given me permission to post the details here :-
DRIVE BEŁT ROLLER UPGRADE
For information of Paul Phillips and Duncan Parker.......Re Eddie Sheppard post last week regarding belt tensioner roller upgrade ...
I have today fitted the Dunlop R15/18 larger roller to my Doc Humphries tensioner arm.
Had to drill out the 6mm hole to 10mm but the end result is a decent two bearing roller with larger diameter and good coverage of the belt.....well up to the job 👍
Is that new roller hitting the Switch in the back now? Its in your third picture.
I posted this of behalf of a friend so I had passed the question on to him
But knowing how experienced he is on working on his RT
I reckon he would ensured there is no clearance issues
I posted this of behalf of a friend so I had passed the question on to him
But knowing how experienced he is on working on his RT
I reckon he would ensured there is no clearance issues
I have his response now see:-
Eddie Sheppard Polenty of clearence ALL around and for full
swing of the arm. The only close part was the roller bolt, but the Doc Humps was just as close. I ground a bit away when I fitted Docs arm. This pic is better angle 👍🕷
Did he actually drill out the ID of the bearings from 6mm to 10mm? I don't see how that is possible. The bearing should be hard and it is too much difference in size.
2011 RTS (Sold to a very nice lady)
1998 Honda Valkyrie
2006 Mustang GT. Varooooom!
US Navy Veteran
SC Law Enforcement Boat Captain
CNC Machine Service Technician
President: Rolling Thunder SC1
Member: Disabled American Veterans, Rock Hill, SC
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Experience is recognizing the same mistake every time you make it!
F4 Customs SWCV, Ultimate, Lidlox, Adjustable Side Vents, Leather Like Grips, SS Grills, Centramatic, Garmin XT2, BajaRon Original Sway Bar w/ Lamonster links, P238
I interpreted that to mean he drilled out the hole in the arm from 6mm to 10mm, to accept a larger diameter bolt.
Dah! Yes, I see it now. Thanks.
2011 RTS (Sold to a very nice lady)
1998 Honda Valkyrie
2006 Mustang GT. Varooooom!
US Navy Veteran
SC Law Enforcement Boat Captain
CNC Machine Service Technician
President: Rolling Thunder SC1
Member: Disabled American Veterans, Rock Hill, SC
Member: American Legion
Experience is recognizing the same mistake every time you make it!
F4 Customs SWCV, Ultimate, Lidlox, Adjustable Side Vents, Leather Like Grips, SS Grills, Centramatic, Garmin XT2, BajaRon Original Sway Bar w/ Lamonster links, P238
I interpreted that to mean he drilled out the hole in the arm from 6mm to 10mm, to accept a larger diameter bolt.
Yes you are correct it was the arm that was drilled out
There were no mods done to the roller
I think the roller takes a 10mm bolt I believe Lamonster roller takes a 6mm bolt
He did ask if he could Lamonster’s roller to the arm but was advised it was not suitable
I don't use a vibration dampener. But if I did, I'd try to go with as big a roller as I could get. Reducing RPM would go a long way towards longevity and a problem free device. I kind of liked the idea of adding O-Rings to the roller. Does anyone know how that approach worked? Not sure if O-Rings could stand up to the abuse. But there are a good number of silicone compounds making for very tough O-Rings out there. Swapping out O-Rings, if necessary, might be less expensive than the complete roller. And would add just a bit more diameter reducing RPM as well.
This brings up an interesting question. What is the RPM that these rollers are turning on the drive belt? The belt speed would be the same for every application. But roller speed is greatly affected by diameter.
I don't use a vibration dampener. But if I did, I'd try to go with as big a roller as I could get. Reducing RPM would go a long way towards longevity and a problem free device. I kind of liked the idea of adding O-Rings to the roller. Does anyone know how that approach worked? Not sure if O-Rings could stand up to the abuse. But there are a good number of silicone compounds making for very tough O-Rings out there. Swapping out O-Rings, if necessary, might be less expensive than the complete roller. And would add just a bit more diameter reducing RPM as well.
I had Docs damper on my other 2013 RT with the orings. The worked fine, I put new orings on each season and that was about 10,000 miles average. definitely got rid of the loud whining of the ribbed belt on the 13"s. Now the 2013 RT Limited I now have. i used the BRP tensioner with Lamonsters roller. I has a quiet whine, but not that noticeable. Very good combination.
Roller upgrade for Doc Humphries Vibration Damper
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Originally Posted by trikermutha
