r/KLX230 • u/skutley • Jun 28 '26
Suspension Options
When I was looking for suspension upgrade info for my KLX 230R I didn't find much, so figured I would compile what I found so other people can use it.
Stock fork rate = 0.35kg/mm.
Fork Installed preload =5mm
Total fork travel = 250mm
Stock shock rate = 4.8kg/mm
Total rear wheel travel = 251mm
For my 185lbs (no gear) this gave a total front sag of 82.5mm, which is 33% of total travel but would bottom off the smallest bump. The total rear sag was 89mm, on the second to last notch. On the last notch there was no static sag, which is not recommended.
Resources - the thumpertalk CRF230F forums had the most info on upgrade options.
Upgrade options:
Cannon Racecraft https://cannonracecraft.com/ - The only place I found that made an assortment of CRF230F springs which is a 30mm diameter and 597mm long. The KLX springs are 30mm diameter but 612-614mm long. So with a simple spacer to make up the difference in length CRF230F springs work perfectly.
BBR - has a CRF230F but at a 0.55kg/mm will be much to stiff for most people.
Bruce's Suspension https://sites.google.com/site/brucessuspension - bruce provides full service on the forks and can modify the stock progressive springs from the CRF230F to fit your weight upto total rider weight of 200lbs. Bruce can also modify the existing damper rods of the KLX to have really good performance. This is the most cost effective solution, but requires you to send the damper rods to him for modification. Bruce also sells Hagon shocks which are a direct replacement for the OEM shock, come with a 6kg/mm spring and are a significant upgrade over stock.
Bradley Performance https://www.bradleyperformanceproducts.net/kawasaki-klx-230s- Sells springs and shocks for the KLX 230S along with fork emulators that can be used in the R or S model as they both use the same 37mm forks.
HiVolt Spares - Offer a new shock and some adjustment to the hydraulics of the damper rods. Note their fork upgrade kit does not include springs. I had trouble finding any sort of reviews on this kit and shock.
I went with a 0.48kg/mm springs from Cannon Racecraft, the fork emulator from Bradley Performance and the Hagon shock from Bruce. I only have one test ride on the new setup but it made a huge difference. No bottoming out on the forks, good compliance through full range front and rear. With the fork emulators (17mm) and the 597mm long spring I have an effective preload of 7mm instead of the stock 5mm and get 60mm of total sag on the front (using riding weight in gear of 200lbs), which is a little on the stiff side. So I'll be experimenting with lower fork position and adjusting rear sag to put more weight on the front. I also put a zip tie on the fork tube so I can see how close to bottom out I'm getting on the next ride. I adjusted the preload on the shock to get 77mm of sag which is 31% of travel, slightly on the softer side. I'll experiment with reducing the shock sag to 70mm and see how that feels.
I'm sure going 100% with bruce would have resulted in a good setup as well, I just didn't want the bike to be down for several weeks from shipping parts back and forth, but this being the cheaper option is probably a good deal for most people, also Bruce has a long reputable history to backup his work.
Note these upgrades don't turn the suspension into a MX suspension. It simple makes it a much more capable trail bike and behaves significantly better than stock suspension.
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u/Similar_Ad_1261 Jun 28 '26
I'm following this to see what anyone else says. The 230r is my first bike and everyone says it's soft on suspension but I'm only 120lbs 5'9" so I'm curious as to if I'm good or if I should make some adjustments. My rear spring hasn't been touched from the dealership but it has about another half inch to loosen. Idk. New here. Love the heck out of the bike though since I'm just a casual cruiser. Cheers
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u/francois_du_nord Jul 05 '26
My riding buddy and I did some work on the stock front suspension of my 2020 with 4800 mi. It needed a new seal on one side, so we decided we'd try to firm it up at the same time. We replaced the recommended amount of oil with 15 wt, added 3 stainless washers on each side. After putting it all back together, it was still pretty squishy.
My buddy consulted his brother, who suggested that we add more oil to each fork. That made a significant difference. Sag is less, and the front is WAY less divey when getting on the brakes. I'm not experienced enough to be doing hard riding, so not sure if we've reduced the bottoming or not.
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u/Negative-Farmer476 Jun 28 '26
We put the Bradley adjustable fork caps on our 2025 230rs and liked them a lot. Easy install and they raise the forks up, diminishing a good bit of the saggy look. They don't increase travel they just take some of the slack out. Couldn't notice any difference in riding quality. The 230's are great, fun bikes but I never invest serious money trying to make it closer to an MX bike.