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Author Topic: DR650 Chain Guide - After-market?  (Read 1229 times)

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Offline Alphat

DR650 Chain Guide - After-market?
« on: September 15, 2015, 09:41:30 am »
Are there any after-market chain guides for the DR650 available locally? I seem to have smashed my OEM one somehow  ???
« Last Edit: September 22, 2015, 10:40:25 am by Alphat »
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Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #1 on: September 22, 2015, 10:39:42 am »
Well I've had no luck getting an aftermarket chain guide. Even tried a Yamaha one but it was too narrow, so I have designed my own.

The front and back plates are 6mm aluminium 5754 and the grey wear blocks are nylon. I will be making it over the weekend and will report back. If it is a success I am happy to share the design with any interested parties.
« Last Edit: September 22, 2015, 10:40:45 am by Alphat »
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Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #2 on: October 05, 2015, 10:06:52 am »
Here are a couple of pics of the homemade chain guide. In total it cost me R65 in materials (for the nylon and hardware, I had the aluminium already) and about 2 hours of sawing and filing.
Excuse the dirty bike  :-[ She did a lot of hard work this weekend between Chimes and Grutte.
« Last Edit: October 05, 2015, 10:10:15 am by Alphat »
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Offline Crab

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Re: DR650 Chain Guide - After-market?
« Reply #3 on: October 05, 2015, 10:16:04 am »
Very neat! I also need one.
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Offline chopperpilot

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Re: DR650 Chain Guide - After-market?
« Reply #4 on: October 05, 2015, 03:15:03 pm »
Nice work!


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Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #5 on: October 05, 2015, 03:45:25 pm »
Very neat! I also need one.

I was thinking of getting some plate laser cut to my original design (not hand made like this one). If I do then I will get a couple extra cut at the same time and let you know. Only problem is the fabricator does small jobs as a favor for me so it sometimes takes a while for them to fit it in with their paid jobs.
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Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #6 on: October 05, 2015, 03:45:42 pm »
Nice work!


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Thanks
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Offline chopperpilot

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Re: DR650 Chain Guide - After-market?
« Reply #7 on: October 05, 2015, 03:46:56 pm »
Very neat! I also need one.

I was thinking of getting some plate laser cut to my original design (not hand made like this one). If I do then I will get a couple extra cut at the same time and let you know. Only problem is the fabricator does small jobs as a favor for me so it sometimes takes a while for them to fit it in with their paid jobs.
Keep us posted please!👍


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Offline Ali

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Re: DR650 Chain Guide - After-market?
« Reply #8 on: October 05, 2015, 03:56:19 pm »
I would also like to buy one from you. :3some:
 

Offline Kykdaar

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Re: DR650 Chain Guide - After-market?
« Reply #9 on: October 05, 2015, 03:57:12 pm »
Good work :thumleft:

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Offline lecap

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Re: DR650 Chain Guide - After-market?
« Reply #10 on: October 06, 2015, 09:29:23 am »
I don't think it's a great idea to replace the broken OEM chain guide with one made with aluminium plates.

The breakage of the OEM part is rare.
I am worried that hard ground contact with the after market part will not break the chain guard as it happens with the OEM part but will instead break the attachment points on the swing arm :-\

I would try and get something made from nylon which is cheaper than OEM. If that does not work out use OEM and replace with OEM if you break it. As mentioned these things don't break a lot.
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Offline Crab

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Re: DR650 Chain Guide - After-market?
« Reply #11 on: October 06, 2015, 10:32:59 am »
What is the price of an OEM part?
Look for a shooting star and see Lynda's trail and remember all the great places you shared with her,she will never forget what she shared with you and will show you that in every starry night .
 

Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #12 on: October 06, 2015, 02:13:26 pm »
I don't think it's a great idea to replace the broken OEM chain guide with one made with aluminium plates.

The breakage of the OEM part is rare.
I am worried that hard ground contact with the after market part will not break the chain guard as it happens with the OEM part but will instead break the attachment points on the swing arm :-\

I would try and get something made from nylon which is cheaper than OEM. If that does not work out use OEM and replace with OEM if you break it. As mentioned these things don't break a lot.

I have thought about this and agree the chain guide is now stronger than the mounting points. As with most things the design will evolve and I intend to introduce a designed-in weak point to ensure that in the case of hard contact, the plate will bend/fail before the mounting points. And then you just replace the damaged plate and are good to go again. Otherwise it is entirely possible to replace the aluminium plates in this design with nylon sheet. I just like the look of the aluminium  :)

As to how the OEM broke; I actually don't know. I went for a spirited offroad ride and only noticed it had broken when I was washing the bike afterwards.

Incidentally lecap, do you know what aluminium the swingarm/guide mounts are made from? I need this info to properly design the weak point in the outer plate.
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Offline Alphat

Re: DR650 Chain Guide - After-market?
« Reply #13 on: October 06, 2015, 02:14:41 pm »
What is the price of an OEM part?


About R750; R500 for the main part and R250 for the bottom wear block.
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Offline oldred

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Re: DR650 Chain Guide - After-market?
« Reply #14 on: October 06, 2015, 02:21:58 pm »
Why not add polyurethane bearings to the bottom they are cheaper and last longer! Available at most bike and auto shops