Possible Bad Radiator Cap??

Little event history first:
During our Idaho Trail Machine State Ride in July, I washed out on a rocky trail, guard protected radiator slammed hard into rocks.
Bent it all back to the water pump smashing a small section of radiator from the backside and put a small slice in lower hose.

Without really looking, got up, attempted to pull radiator back out a bit and take off down the trail. Coolant quickly sprayed everywhere.....I use Engine Ice and gee, no Engine Ice dealer on the trail at 7500ft, so after near worthless tape job on hose, in goes the drinking water to top it off and I limped back to camp.
(FYI: many wraps of electrical tape will only slow tiny hose leak....now pack a roll of radiator repair tape, which slows to a small drip just in case)

On the ride out I dead engine coasted where I could to keep water in and heat down.
(actually kind of fun coasting down single track at 15-18mph....& almost run into a wolf doing so)
Once back at camp was able to find some heater hose and auto antifreeze, some of the guys use, and water flow thru tanks appeared good, so it keep me riding the next two days.

During that time I learned that our coolant overflow tanks work pretty much like a car. When it gets hot it blows out to overflow tank, on cooling sucks it right back up and gurgles when empty as if asking for a drink (which it got my water again)......but when it blows too much out, that very hot fluid sprays out the overflow tank vent like Old Faithful right on the inside of your leg......real attention getter. I quickly learned how to stop on our tight single track with my left leg up over the bar.
My bike boiled over several more times during the those 2 days, which is very unusual for this bike

Now the Problem/Concern:
Since replacing radiator, hose and refilling w/Engine Ice, I've been on two, more or less advanced mtn trail rides and the bike is boiling over.....again - not typical for this bike, and has not done that before on these trails. Most I ever needing in the past was an ounce or two in the recovery tank

My initial fear was a blown water jacket seal in the head gasket, but no coolant in oil, no oil in coolant, clean plug, clean pipe and bike runs great, except for the boil overs happening too quickly once on slow single track.

I'm now thinking it's not getting that hot and after a couple years and extra abuse it took on the State Ride, that my stock radiator cap has weakened and blowing off at low pressure.........anyway I have order a new CV4 20psi (1.4) cap.

Thoughts??

Yeah, I knew that, but speaking of which. I read that a few of the KTM's are going to a 1.8 cap, and when picking up my new cap at my dealer, they had the new Husaberg FE390 on the floor (nice looking bike) it also comes with a higher pressure 1.8 cap

Yep......all the same, except new CV4 cap is 20psi (1.4) instead of stock's 16psi (1.1)

Talking about this again, one of my riding buddies recalled my bike/cap did blow off once on a slow steep section prior to the crash and they didn't.......I give these guys crap about their (KTM) tea kettles, so if mine goes, they remember and are quick on the payback.
This is making me even more convinced that the stock cap went bad on me and not a heat issue. (but not convinced enough to not pack extra Engine Ice w/me)

Now I just need to find time to get back out on some of the same technical stuff and prove it, before weather starts cooling off too much.

Question

Once the bike overheats is the cap toast? I overheated mine for the first time and it looks like the little plastic inset (in the cap) is melted??????

I wouldn't have thought so, at least not from one overheating, but not sure.......I do think that several boil overs as I had effected the cap. However, due to work load and now cold snowy weather here, I was never able to go out and see if my problem was the cap as I suspect.

If scott summers tells me to get a 1.8 cap then I think its a good mod. Higher pressure in the system will keep the o2 bubbles at bay and let the coolent work better.

Ty Davis sell a coolant which is waterless So no water no boil you can darn near run with out a cap Boiling point is way up there In 4 year of using it i have never lost a drop Both in 2 strokes or 4 No water no rust so it last just about forever .

UPDATE: Sorry it's taken so long, but finally able to out and ride again.
Two rides now and zero problems, so appears my boil over issue was a bad radiator cap.

This last Saturdays ride with friend on a 525EXC was the ride that convinced me the cap was the problem, and that it is fixed now.
We went on a couple steep loose single track trails with some tight technical sections where I intentionally worked the bike at slow speed. Stopped at the top and my Husky sat quiet, while we listened to the KTM spit/gurgle into his catch tank. (the KTM has a fan added but wasn't working that ride for some reason.....suspect blown fuse problem we had earlier)

UPDATE No.2: Started seemingly having boil over issues again with hot coolant spraying out of recovery tank and cooking my leg.
Right up front I'm going to admit these were warmer rides where some blow off thru cap could be expected, but not the geyser effect out the tank.

After 2-3 of these events, I took bike to shop for pressure check because I was worried about bad head gasket...........compression check hot and cold was fine.
Turned out that clear back on my many boil overs after crash mentioned at top, the overflow tank cap had melted inside and was no longer hold pressure or collant, so everytime the cap released a bit it would shot right out the vent onto my leg............replaced cap, rode last weekend on hot slow sections where I knew bike was getting hot. It did puke into coolant tank as it should, but only dibbled a little excess out of recovery tank and sucked back out of tank like it is suppose when cooling..........NOW it's fixed and back to normal