Roller upgrade for Doc Humphries Vibration Damper

[eddieshep999]

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

 

[trikermutha]

Is that new roller hitting the Switch in the back now? Its in your third picture.

 

[eddieshep999]

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

 

[eddieshep999]

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 🕷

 

[Lew L]

Is this item available in the USA??? Shipping costs more than the part. I looked around and couldn't find a US supplier but I'll keep at it.
Lew L

 

[Grandpot]

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.

 

[trikermutha]

Lovejoy has a compatible roller on amazon

 

[Snowbelt Spyder]

I interpreted that to mean he drilled out the hole in the arm from 6mm to 10mm, to accept a larger diameter bolt.

 

[Grandpot]

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.

 

[Snowbelt Spyder]

Dah! Yes, I see it now. Thanks.

Which begs the question - is that all it will take to make Lamonster's roller work - to drill out the hole to fit his bolt?

 

[Lew L]

opcorn:

Watching This thread.

 

[eddieshep999]

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

 

[eddieshep999]

I have found the dimensions of the roller if it helps as he purchased his from e bay UK site and you may find in your country with the same dimensions

 

[PW2013STL]

Looks like Rosta 06580002 is identical in size. Lowest price I found with shipping is $52 on Ebay.

 

[eddieshep999]

Looks like Rosta 06580002 is identical in size. Lowest price I found with shipping is $52 on Ebay.

This gives details on that roller
https://www.usarollerchain.com/Rosta-06580002-R15-18-Tensioning-Roller-p/06580002-r15-18-roller.htm

 

[troop]

Looks like Rosta 06580002 is identical in size. Lowest price I found with shipping is $52 on Ebay.

https://www.ebay.com/i/183403634534...1291&msclkid=071fe2e1905e1c1e8121bc2a572e2877

 

[trikermutha]

Lovejoy 68514453028 R-15/18 Tensioning Roller

 

[Lew L]

Thanks Troop, for doing all the" leg" work. Seen them as high as $90.

 

[BajaRon]

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.

 

[T.P.]

https://www.rosta.us/en/products/docs/Tensioning-Technology/ROSTA_Produktkatalog_EN-low 5.pdf

The R27 is bigger in diameter but that cuts it down to a 6000 rpm max vs 8000 rpm for R-15/18
scroll down to page 5.12 for specs (page 13 0f 16)

https://www.ebay.com/i/183403634420...403634420&pmt=0&noa=1&pg=2386202&algv=Default

T.P.