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If you have one of the 2020 and newer KLX300Rs do a search for KLX250 lowering links, or even make your own from flat stock. They are flat plate. If you buy links you need to know which years. The new 300 will match up with the 250/300 from 2009 up. I looked at Partzilla's parts schematic and found the same link part is used on all the 2009-2022 KLX250/300. click here
For a 2008 or older you need to figure out which length to buy, it may be stamped on the links on your bike.
To make your own, find what thickness of steel and how wide it is to get flat stock that is close to the same. Jack the bike up using a hydraulic jack that will allow you to lower the bike. Get the bike until the tires are just touching. Remove the link bolts. Carefully lower the bike the amount you want, probably no more than 2", then measure center to center on the mount points. Mark, cut, and drill a couple pieces to suit and bolt them on. I've known a few riders that have done this. I would say 1/8-3/16 thick would do the job well.
I want to lower my KLX300R. Suggestions for linkage please.
I used Koubalinks (gold links in pic) to lower the rear and raised the fork tubes in the triple to lower the front. You can tell it's lower because the rear swingarm is parallel to the ground instead of angled downward towards the axle. Cutting the kickstand shorter is required.
I also spun the lockrings almost all the way up on the rear shock. Then I installed low narrow alloy clipon bars directly onto the exposed tops of the fork tubes.
The bike has an unsprung seat height of just 30 inches, and even lower when I'm on it.
The bike corners super with a dramatically lower center of gravity for both bike chassis and rider.
The one picture above also shows just how simple the links are. If you have the capability to make them it's fairly easy. My brother did a set for his 250 and a rider I knew made them for his KDX220. They're just flat stock with the center area necked a bit, which isn't necessary. The Koubas will be thicker because they're aluminum, steel has around twice the strength in the application, allowing thinner stock than aluminum. If you have the necessary equipment to make them and want to be certain, you could do 1/4" stock, but that's a bit of overkill. You could support a pickup truck with that.
But not everyone has the time, the materials, and the necessary tools to make the parts so it is no reflection on someone for not doing so.
Links can be bought for around $35 for some from China up to around $90 for Kouba.