ARO 137 on 2014 YZ 450 chain

Aug 31, 2013
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Hey guys.

2014 Yz450 with an 18 ARO 137 kit. I replaced the stock front chain slider as it was broken and worn right through during the preseason checkover.

With the kit back installed I'm starting to notice some things. The replacement slider after a 5 mile test ride is wearing quite severely. Almost like the center rib of it is off by about 1/8" to the center of the chain.

This got me looking into seeing if the kit spacers were installed correctly. They look perfect. Can't see any part numbers to confirm but I cant see them fitting any other way. I also took some measurements and the kit doesn't seem to be quite centered on the bike. But are my measurements point centered on the frame???

Can someone with a similar set up check their measurements to mine and let me know if I have something potentially installed incorrectly. Left side from the outside of the wishbone mount to the outside of the kit side panel is 3 5/8". Right side is 4 1/8"

Thanks in advance
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BigAir

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You should post this on the Timbersled Facebook group and you would probably get more replies. I am in the process of installing a 2018 ARO on my 2014 YZ right now. I'll try to get you some measurements from mine.
 

ravenous

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Oct 21, 2013
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You didnt install anything wrong. We found the same thing here on two Aro 3s mounted to a KTM and a Husky, and an Aro S mounted to a 450 Yammie. Right now it kinda looks like they messed up on the front slider.
 

BigAir

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Mine is 3-5/8" and my buddies 2019 is also 3-5/8". The slider just seems to sit about 1/4" out of line. Ravenous must be right that the slider is just built wrong.
 
Aug 31, 2013
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Thanks for the replys guys. That's exactly what it looks like is the center rib on the slider is made 1/8" to far out. I think the articulation from the TSS is exaggerating the wear as well. That slider has maybe 5 miles on it and the center rib is damn near worn half down. Anybody try the chain mod by flipping the secondary slider? I personally don't think their would be enough clearance from the chain to the track, and dont know how the Chain would react when the TSS compresses. I guess the $35 slider is cheap to replace yearly, just a pain to do.

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Jan 18, 2018
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Thanks for the replys guys. That's exactly what it looks like is the center rib on the slider is made 1/8" to far out. I think the articulation from the TSS is exaggerating the wear as well. That slider has maybe 5 miles on it and the center rib is damn near worn half down. Anybody try the chain mod by flipping the secondary slider? I personally don't think their would be enough clearance from the chain to the track, and dont know how the Chain would react when the TSS compresses. I guess the $35 slider is cheap to replace yearly, just a pain to do.

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I just ground that center ridge off. It is meant to line up centered on the chain, but I have yet to see a kit where that works out (I have a YZ as well).

You should also make sure to check your chain clearance at full stuff with the TSS. Most chain breakages are from folks running chains too tight and then big hits compressing the TSS and pop there goes your chain.

Kits are usually not perfectly centered if you measure carefully. Yours is close enough you won't notice it.
 

CB-BLR

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Apr 22, 2019
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You should also make sure to check your chain clearance at full stuff with the TSS. Most chain breakages are from folks running chains too tight and then big hits compressing the TSS and pop there goes your chain.

--The chain loosens as the TSS is compressed.
- Chris
 
Jan 18, 2018
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CB-BLR, yes I am probably wrong. I was told that as something to watch for, but that was with kits from 4 years ago? Higher rear sprocket now, I see that you are more likely right than I.

I hate it when I don't think before typing.
 
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