Tips on loosening the adjuster screw

There have been others that have broken the chain adjuster bolt. One problem is a small drain hole in the swing arm just forward of the weld plugs and water stays in the arm, and rusts end of the bolt.

Clear the drain, spray your favorite penatrating/rust buster and work the bolt in a out carefully.

found the hold under the arm injected a lot of oil and loosened the nut and new oil there will do so for a few days while I drive so hopefully it will come in and "dissolve" the rust. then thought of trying to tap it for a while and maybe heat it a bit with a heat gun. Afraid that it will go off and that the first season will take a long break

DO not try to remove it. It is too late. I have already broken mine (same bike) and replaced with repair kit.

Years ago I read about this issue while having some resistance there.
I removed it, re-tapped the threads, greased the hell of it.

More importantly, I no longer lock the adjuster nut tight, just enough to avoid rattling.
ALSO the adjuster bolt is not touching the slider after the axle nut is torqued (I screw it a few hairs away on purpose).
The axle nut torque is 108 N.m; I never seen the axle move to compress the adjuster bolt.

This avoids unnecessary pressure on the adjuster bolt threads.
It's been fine ever since, though I can't conclude if it is the grease, the thread re-tap or the slider separation that helped.

DmitryS said:

DO not try to remove it. It is too late. I have already broken mine (same bike) and replaced with repair kit.

Click to expand...

but at some point I have to adjust the chain again. what kit did you use?

I'd recommend you to screw the bolt in, add some nut between the bolt and the adjuster, make your work, and remove the nut. By the time the nut will not work anymore, it's time to replace the chain.

M8x50 Swingarm Chain Adjuster Bolt Screws Repair Kit Saver For Honda Kawasaki Suzuki Yamaha CR CRF KX RM YZ CR125 CR250 CR500

The kit is good, but bolt is 13mm instead of 12 in original.

unfortunately I can't screw it in any direction right now, when I started to adjust the chain it was slow but could be screwed a little, had I known this I would have unscrewed the whole thing straight away. I thought it was going slow because I tightened the chain (first time on the first bike 😭) I think I have the right setting right now, it varies a little in different places of the chain.

Look. Do not hurry. Spray a lot of wd40. Let it sit for days. Then try again to screw it in. Maybe this will work. And you can adjust the chain without those bolts, but it is a bit harder.

going to lubricate a little every day not in a super hurry but when I find something wrong I want to fix it right away. probably it was just in its extreme position without the rust setting in and when I unscrewed a few turns it snapped. nice to know there are kits to fix it in the worst case scenario

DmitryS said:

I'd recommend you to screw the bolt in, add some nut between the bolt and the adjuster, make your work, and remove the nut. By the time the nut will not work anymore, it's time to replace the chain.

M8x50 Swingarm Chain Adjuster Bolt Screws Repair Kit Saver For Honda Kawasaki Suzuki Yamaha CR CRF KX RM YZ CR125 CR250 CR500

https://a.aliexpress.com/_EI8cR4h

The kit is good, but bolt is 13mm instead of 12 in original.

Click to expand...

Does this fit the version 650 2008? Can't find the model in the list.

Yes. It is pretty universal. But - you need to drill a hole in your bike!

A tip , heat gun to loosen + penetrating oil. I use a metric thread chaser after. Then the magic anti seize I used in the gravel pit on all threaded fittings, without using it, nothing comes apart after 2 months!!

Note the temperature rating

JET-LUBE HIGH TEMPERATURE ANTI-SEIZE COMPOUND, GENERAL PURPOSE, BRUSH-TOP, 227 ML - Anti-Seize Compounds - JTL10202 | 10202 - Grainger, Canada

Find your JET-LUBE HIGH TEMPERATURE ANTI-SEIZE COMPOUND, GENERAL PURPOSE, BRUSH-TOP, 227 ML at Grainger Canada, formerly Acklands-Grainger. We have been Canada's premiere industrial supplier for over 125 years with superior service and quality.

www.grainger.ca

Canadian tire

General PDP Template

www.canadiantire.ca

General PDP Template

www.canadiantire.ca

I would suggest this version of Permatex, noting moisture resistance and temperature rating