Upgrade to enjoy this feature!
Vital MX fantasy is free to play, but Premium users receive great benefits. Premium benefits include:
- View and download rider stats
- Pick trends
- Create a private league
- And more!
Only $10 for all 2026 SX, MX, and SMX series.
I used the mylers one on rocky mountain.
I always use the Kawi 1.6 or 1.8 on my Honda's, I can get you the part number if you need
Twin Air 1.8 (177900) or 2.0 bar (177903)
Stock KTM cap from 2019 gives you a 1.8. I've never lost a drip.
The Shop
Free shipping: VITALMX
Luxon 4-Post Bar Mounts
$189.95 - $239.95
DeCal Works Huge Plastic Inventory of UFO and Polisport kits.
I use a 1.8 from twin air on my 250 and it’s perfect.
Stock Japanese is a 1.1 so any upgrade from 1.3 - 2.0 will be step in the right direction.
Just remember that Higher PSI will also reveal any weaknesses.
I went with a cv4 2.0 on mine.
Thank you everyone I appreciate all of you!
I'm stupid about this kind of thing. What weaknesses? Like how tight the hoses are sealed up, or how much pressure the radiator can take?
Some of these caps will allow the system pressure to almost double; so, what Hoser is saying is that if there's a weakness/potential leak in your system...? Well, a higher pressure cap just might help you find it...sooner.
Tusk one with the gauge. Its super useful if i have any doubts if im running hot or not. Just one look down and I know.
Gotcha. Thanks dude!
Update just got a tusk 1.6 for my 23 crf 450 👌🏻
As a random data point, I've only seen 2 rad caps go bad while in our adventures. And both were Tusk...
I would suggest you replace with a quality branded rad cap of your choice in desired pressure rating.
Yes and my thinking is more about head gaskets and water pump bearings and seal wear.
I just spend close to 10 grand on a new bike the last thing I wanna do is spend more money than I have to lol. The stock cap has been doing well so far I just wanna make sure it doesn’t boil over on long rides
For long rides, a solid idea might be an over-flow catch tank...aka, over-flow-bottle. From the bad-ass Ti version as seen at Pro Circuit to incorporating a std plastic bottle from the X/RL that goes under your motor behind the skid plate.
Tusk cap and engine ice antifreeze
Pit Row
Race Tech Titanium sells these bad boys as well. Pro Circuits coolant catch tanks are on back order for who knows how long.
I just got mine about two weeks ago for $165.
This is exactly why I would spend the extra money for the piece of mind.
We see a good handful of bikes roll through with issues due to those tusk caps not releasing or releasing too early so keep an eye on it!
So you’re telling me it’s worse than a stock radiator cap? If it’s not I don’t need your drama bro
It's your bike and your money. You asked for opinions and are getting them. Yes, it's worse than a stock radiator cap. Tusk products are typically lower quality to achieve a lower price point.
With that said, Tusk products have their place. I've purchased Tusk stuff and will continue to but I stick with levers, the occasional tools, etc. Nothing ever for critical engine function. Just an opinion...
Enjoy that new bike. My son just brought one of those home, I'm jealous. Been thinking of going green to red!
Most aftermarket products, not just tusk, are inferior to oem.
Can confirm. If you knew the severe pains the OEM goes through to select just the most mundane of parts, you'd understand why.
Now, aftermarket parts often have performance improvements which are useful enough to trade off the quality standards. For instance, I'd be fine going with an aftermarket exhaust, which saves several pounds. It won't last 15 years like the stocker would, but who cares if it's lighter and makes your bike faster?
Radiator caps are one of those parts which are not made by the OEMs, and the aftermarket companies often source them from the same sellers but with different specifications. I'm actually surprised that Tusk was able to find a manufacturer that made an inferior cap. They must have looked hard!
Well shit,
just ordered a cv4 2.0 lol. Yea man not gonna lie Honda stepped up fat since my piece o shit 2011 crf 450. The new 24 kawi 450 looks sick but at the same time it’s a first year model and you know how those can be you know? I can tell you for sure this bike is the best bike I’ve had out of the box. I just had to change the rear spring because it was way too soft for me. Green or red you can’t fail
Any updates on how its been working?
It worked great. Had it for probably a year now. No leaks. Holds pressure fine
Post a reply to: Radiator cap upgrade 23 crf 450