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Old 06-04-2011, 11:45 PM   #1
Spud Rider OP
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XR650L: Spud Rollers for Your Chain Guide

I have never liked the chain guide slider on my XR650L. Therefore, I decided to replace the chain guide slider with two chain rollers. After employing two different, commercial chain rollers, I decided to experiment with polyurethane tubing. You can read the details of my chain roller modification in the following thread.

http://www.advrider.com/forums/showthread.php?t=667646

My polyurethane Spud Rollers have proven to be far superior to the commercial chain rollers I have experimented with in my chain guide. For example, here is a photograph of a sealed bearing chain roller, and an unsealed, Delrin chain roller after 2,400 miles of wear in my chain guide.



The chain guide is a dirty, harsh environment for chain rollers. Besides rolling friction, the drive chain impacts the chain rollers, subjecting them to further abuse. Therefore, it is not surprising my sealed bearing chain roller fractured after 3,800 miles of wear. At that point I decided to replace the sealed bearing chain roller with another unsealed, Delrin chain roller.



The unsealed, Delrin chain rollers have sustained chain impact better than the sealed bearing chain roller. However, rolling friction from the drive chain still wears the commercial, unsealed chain rollers at an unacceptable rate. In the following photograph, the front chain roller, on the left, has 1,200 miles of wear. The rear chain roller, on the right, has 5,000 miles of wear.



After observing this wear, I decided to experiment with my polyurethane Spud Rollers. I am pleased to report my polyurethane chain rollers are performing superbly; they are far superior to the commercial chain rollers I have previously employed in my chain guide. After 1,850 miles of service in my chain guide, my Spud Rollers are showing virtually no wear.



I bought my polyurethane tubing from a local, industrial supply shop.

If you decide to perform my chain roller modification, you will also need to purchase two, 3/8 x 2-inch, hex head bolts, two 3/8-inch, nyloc nuts. These bolts, nuts and washers are readily available in almost every local hardware store.

If you are interested in buying one or more of my Spud Rollers, please send me a personal message, and we can arrange for payment. I accept either personal checks, or payment via my PayPal account.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-27-2011 at 10:53 PM
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Old 06-05-2011, 09:00 AM   #2
hogdoc
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That's cool spud, where locally did you find the poly tubing? Are we locally in the same area, Boise/Meridian?
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Old 06-06-2011, 12:54 AM   #3
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Quote:
Originally Posted by hogdoc View Post
That's cool spud, where locally did you find the poly tubing? Are we locally in the same area, Boise/Meridian?
I live on the other side of the state, Doc. I prefer to keep my material source confidential.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil
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Old 06-16-2011, 10:07 PM   #4
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Today I inspected my Spud Rollers. After experimenting with two different types of commercial chain rollers, I installed my polyurethane Spud Rollers in my chain guide. Here is a photograph of the "left" side of my Spud Rollers after 3,000 miles of wear.



Here is a photo of the top view of my Spud Rollers. As you can see, my Spud Rollers have virtually no wear after 3,000 miles of riding.



My Spud Rollers are virtually maintenance free, and have survived a lot of punishment in the dirty, harsh environment of the chain guide. For the purposes of comparison, here is a photo of two, commercial, chain rollers after 2,400 miles of wear in my chain guide.




Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-11-2011 at 01:26 PM
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Old 06-16-2011, 11:16 PM   #5
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Installing my Spud Rollers requires a slight modification of your XR650L chain guide. I recommend you follow this procedure.

Spud Roller Installation Guide

1) For each pair of rollers purchase the following items from a local hardware store.

Two 3/8 x 2-inch, hex head bolts (any grade metal is fine)
Two 3/8-inch nyloc nuts

2) Loosen the two bolts, and remove the chain slider from your chain guard.

3) Using a 3/8-inch drill bit, enlarge the two holes in the chain guard to 3/8-inch.

4) Install the polyurethane rollers using the hardware purchased in step 1, placing the nyloc nuts on the wheel side of the chain guide.

5) Tighten the bolts securely, but not so tight you can't rotate the Spud Rollers by hand.

6) Every few hundred miles, inspect the bolts to ensure they are still tight.


If you are interested in buying one or more of my Spud Rollers, please send me a personal message, and we can arrange for payment. I accept either personal checks, or payment via my PayPal account.


Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-27-2011 at 10:54 PM
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Old 06-21-2011, 11:47 PM   #6
michael.brat
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I'm glad you're selling these! I was just thinking about asking you when I got back from my mini trip.
How do I pay? Send me some!

Btw, can you post a picture of the spud roller set up installed in the chain guide? I'd like to get a visual. Do you find that the bolts tend to loosen? I'm wondering if thinner bolts with a 5/16 sleeve would be a better permanent solution so it can be fully tightened. Or maybe I'm just over thinking it.


Mike B
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Old 07-01-2011, 10:32 AM   #7
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Yesterday I decided to change the mounting hardware for the Spud Rollers in my chain guide. For the last 4,700 miles, I have been using two, 5/16 x 2-inch bolts, nyloc nuts and washers to secure the polyurethane chain rollers in my chain guide. Yesterday I switched to to two, 3/8 x 2-inch bolts and nyloc nuts.



Since both the bolt heads, and the nyloc nuts of my new, 3/8-inch hardware are much larger, I decided not to use the washers shown in the photograph above. I'm pleased to report the hex head bolts and nyloc nuts hold my Spud Rollers very securely in the chain guide.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-11-2011 at 01:35 PM
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Old 07-03-2011, 11:37 PM   #8
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The rear of my chain guide had a few cracks in the plastic when I acquired my used, XR650L. Also, my chain guide has recently taken some punishment in the Idaho rocks. Since a new chain guide is relatively inexpensive, and because my Spud Rollers are wearing so well, today I decided to trim the rear of my chain guide, and experiment with a single Spud Roller installed in the front of the chain guide.







My original objectives for this modification were to reduce chain guide maintenance, drive chain friction, and the replacement cost of wear items such as the "chain slipper" and the chain guide slider. I am very satisfied with my success regarding these objectives. However, I now wish to discover if a single Spud Roller in the chain guide works as well as two. Two chain rollers will cost less, make less noise, and induce even less drive chain friction than three chain rollers.





So far I have ridden about 150 miles with a single Spud Roller in my chain guide, and all looks well. I will continue to keep you updated regarding the performance, and durability of my single Spud Roller.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil
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Old 07-06-2011, 10:28 PM   #9
michael.brat
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Quote:
Originally Posted by Spud Rider View Post
Yesterday I decided to change the mounting hardware for the Spud Rollers in my chain guide. For the last 4,700 miles, I have been using two, 5/16 x 2-inch bolts, nyloc nuts and washers to secure the polyurethane chain rollers in my chain guide. Yesterday I switched to to two, 3/8 x 2-inch bolts and nyloc nuts.



Since both the bolt heads, and the nyloc nuts of my new, 3/8-inch hardware are much larger, I decided not to use the washers shown in the photograph above. I'm pleased to report the hex head bolts and nyloc nuts hold my Spud Rollers very securely in the chain guide. However, if you are interested, for an additional cost I can also supply my Spud Rollers with two, 3/8-inch sleeves which span the chain guide.

Spud
I should of thought of that
I noticed a good amount of play with the current 5/16 bolts. It's also pretty noisy. Doesn't bother me but I notice it.
I'll run to the local hardware store tomorrow and pick up some larger ones.

Btw; installed that RK chain, front chain roller (spud recommended special ), and a Renthal XRR 15T. Nice design to their sprocket; I'll let you know how it holds up. Had to grind down about 2mm on the backside inner splines to get it to fit (like the Primary Drive one)

Mike B
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Old 07-07-2011, 12:23 AM   #10
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Quote:
Originally Posted by michael.brat View Post
I should of thought of that
I noticed a good amount of play with the current 5/16 bolts. It's also pretty noisy. Doesn't bother me but I notice it.
I'll run to the local hardware store tomorrow and pick up some larger ones.

Btw; installed that RK chain, front chain roller (spud recommended special ), and a Renthal XRR 15T. Nice design to their sprocket; I'll let you know how it holds up. Had to grind down about 2mm on the backside inner splines to get it to fit (like the Primary Drive one)

Mike B
Thanks for the report, Mike! Please do keep us updated regarding the performance, and the durability of your Spud Rollers.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil
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Old 07-11-2011, 02:56 AM   #11
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Several days ago I installed a new drive chain, and new sprockets. Therefore, I took the opportunity to inspect my Spud Roller. Here is a view of my mounting hardware, and the port side of my single Spud Roller after 5,700 miles of total wear, and 600 miles of wear as the solo roller in my chain guide.



Here is a top view of my single Spud Roller after 5,700 miles of total wear, and 600 miles of wear as the solo roller in my chain guide.



When I installed my new drive chain, I switched from a 13T/45T sprocket combination to a 14T/48T sprocket combination. Since the larger rear sprocket has lowered the bottom of my drive chain, I am glad I switched to a single Spud Roller. The single, forward roller allows more clearance from the rear sprocket, and facilitates removal of the rear wheel, et cetera.





Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-11-2011 at 03:09 AM
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Old 07-19-2011, 02:10 AM   #12
Spud Rider OP
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The following photograph shows the clearance between the drive chain and a single Spud Roller when the rear wheel has a 45-tooth sprocket.



This photo shows the clearance between the drive chain and a single Spud Roller when the rear wheel has a 48-tooth sprocket.



As you can see, the 48-tooth rear sprocket significantly reduces the clearance between the drive chain and the chain roller. Therefore, I think it's best to use a single Spud Roller mounted in the front position of the chain guide when employing a 48T, or larger, rear sprocket.

The next photograph shows the clearance between the drive chain and a pair of Spud Rollers when the rear wheel has a 45-tooth rear sprocket.



I think a pair of Spud Rollers works best when a 45T sprocket is mounted on the rear wheel. Consequently, I am now offering the option to purchase either a single Spud Roller, or a pair of Spud Rollers.

The cost of a single Spud Roller is $7.50, delivered. Each additional Spud Roller will cost $5.50. If you are interested in buying one or more of my Spud Rollers, please send me a personal message, and we can arrange for payment. I accept either personal checks, or payment via my PayPal account.

Spud
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2005 XR650L: Shorai Battery Relocation, Spud Oil Cooler, XR650R C/S Sprocket, Reinforced Subframe, Chain Slipper Roller, Performance Design Lowering Link, Baja Designs Headlight, FMF Hi-Flo Header, ManRacks SD Rack, ManRacks Front Fender Farkle, CST Surge I Front Tire, D952 Rear Tire, Tusk D-Flex Handguards, Uni Air Filter, No-Toil Evolution air filter oil

Spud Rider screwed with this post 07-27-2011 at 10:55 PM
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