Any 350 owners with quick turn throttles? Advice needed

I didn’t notice much difference with their 20% compared to the stock fast cam, if you look under just the throttle cams available, they have an even larger one, that’s what I’m using now and it’s pretty quick

Motion Pro Rev-3 system is the way.  The only way to get a truly quick turn setup on that bike with legit big cams.  I have one on my one 350.  It also has like 6 different reels you can swap between.  The 2 largest are 45mm and 50mm which make everything else look puny.   For reference, the stock cams are in the range of 36-39mm.  Any setup that uses the stock throttle housing is going to be limited by the space in the housing.  Another benefit of the Rev-3 system is it is ODI lock on grip compatible.  Which is nice if you prefer to keep using lock on grips.

Good to know --- how "forgiving of mistakes" are the larger Motion Pro cams? That is, are they suuuuuper responsive and great when you're fresh but potentially dangerous when you're tired/sloppier?

I've noticed once I'm mid revs on the 350, it certainly is responding how I like and the larger cam is no longer my preference ---> But the low-end I want would benefit from a larger cam ---> Are the throttle cams all linear or are there a few progressive ones that focus on more initial hit and then standard/OEM throttle rate?

I’m running the 00K cam, they claim 30%. It did require me to hog out the throttle housing a little bit to fit, but it is an improvement. Not sure if I would go more personally, FGR01 must be a maniac lol 

https://www.motionpro.com/c/rev3-throttle

All the info, including a graph comparing the reels.  Some are progressive.    On my 350 with the Rev-3 I also have an XPR Vortex, 2-stroke filter cage, and vented airbox cover.   It rips pretty good.  I usually run the 45mm reel.  That with the Vortex makes for a very responsive bike that takes very little wrist movement to make a lot happen.  On a 350, it's not too bad since they are somewhat soft on bottom.  I imagine the 45 or 50 on a 450 would need a real delicate touch.  I've actually never tried the 50mm reel because I imagine it's pretty crazy.  But I want to just to know.  

Anyone ever try out differnt odi reels on their bikes like a like say ktms odi quick turn reel that comes in the kit on a kxf or yzf.

I was wondering about that the other day.

Tried to run YZF cam, too thick for KTM throttle housing, need to modify.

For the 23+ the white cam has the quickest turn. Part number A440.02.015.000.  I have one but have never tried it. The stock black cam is plenty fast for me. 

Just bought a few Motion Pro Titan throttle tubes for KTMs + all of the cams Motion Pro offers as well to solve this problem once and for all ... but the cams are too wide/thick for the OEM throttle-tube housing like the ODI Yamaha cam is, so I am going to have to go the Motion Pro Rev 3 throttle housing full-up route if I go Motion Pro ---> And the reason I like plastic throttle tubes is that I benefit from the lessened vibration.

Note: Motion Pro's website DID say that the Titan throttle tube fits the OEM housing - which it does - but only if using the OEM & ODI KTM cams. The Titan tube also fits the Rev 3 throttle housing with ALL Motion Pro cams as well, of course. I just got too hopeful and trigger happy. They are adding the following verbiage to assist future, idiot customers like me: "The Titan throttle tube works with both our Rev 3 throttle housing and all Motion Pro cams for the specific application as well as OEM snap-on cams, where applicable. The OEM throttle housing will not accept Motion Pro Rev 3 cams, however (they are too wide)." 

Also, I just learned from ODI that their "Cam M" for their lock-on grips is actually right in the middle between the OEM gray cam and OEM black cam, so there is additional snap to be had with the OEM black cam potentially.

SUPER interested in your results ^^^ ---- my hope is that this mod is AWESOME for you & I'll be on it, too!

Here are the next steps in the hopper for me to improve the 350 SX-F's "snappiness":
(1) Quick-turn throttle cam
(2) Rekluse Torque Drive clutch pack --- I am told these REALLY hookup vs. stock
(3) 2-stroke air filter cage
(4) 2-stroke intake tract (on-the-fence about modifying the bike to this level TBH ... currently no time anyway)
(5) Play with Vortex ECU low/mid/high fuel trim levels --- I am generally good with TD's high-elevation map, but I need to tweak it a bit
(6) Try out an Akropovic "Evolution Line" full titanium system I have that I haven't used because it doesn't have a spark arrestor
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For ref, things I've already done to the 2022 KTM 350 SX-F to make it snappier (I'd say I'm 90% there):
(1) Full FMF titanium system with KTM 250 SX-F model header (shorter) for more low-end
(2) Twisted Development programmed Vortex ECU --- running "High Elevation Map 2" and now and adjusting fuel trims
(3) 53/14 gearing (stock is 51/14)
(4) ODI "M" throttle cam (it's halfway between OEM gray and Black ODI told me)
(5) 110/90-19 rear tire --- but I was ACCIDENTALLY running a 100/90-19 (previous owner used that size for some reason) and it ... was ... GOOD --- the bike was honestly more fun/flowy on the track & trail and snappier, especially on mountain singletrack ... hmmm, never thought I'd be considering this

It's not that they are trying to force you to buy their housing.  The Rev-3 reels are just plain too big to fit in the stock housing.   They are huge compared to the stock reels.   That's why you cannot get a very-quick turning throttle no matter what if you limit yourself to the stock housing.  You just can't fit a really big reel in there.

I ordered all the quicker-than-OEM cams Motion Pro (MP) offers for KTM mx bikes as well as a new OEM throttle housing to explore modding options to see if I could get there (knowing the MP cams are designed for their Rev 3 system, NOT OEM) and the mod was just too aggressive for me, leaving very little throttle housing wall left. Same for modifying the cam thickness as well. See pics below. Had to see it myself.

I'm now going down the G2 Ergonomics throttle path and have purchased the +10%, +20%, and +30% cams to try (these fit in OEM throttle housing). 

I've also purchased the KTM OEM grip set to get the black/quicker cam that I was missing from the beginning.

More to come on how this experiment pans out.

I'm puzzled why you didn't get the Motion Pro Housing that is intended for these reels.  They are specifically designed for that housing and are not intended to be used with the stock housing.

2 reasons:
(1) I wanted to see if the stock housing could be minimally modified to accept the Motion Pro cams --- if it was less invasive, I'd have done it. I've heard of others going this route, so I thought it warranted a look and it ended up not being for me.
(2) I am not a fan of Motion Pro cables generally - personal preference. I wasn't interested in going down that path unless necessary.

Oh - and I am stupid, as you elude to. 😁 (just kidding ... and here come the downvotes)

A refresher on why I personally am pursuing quicker throttle cams on KTMs (that may help other new-to-KTM riders):
(1) I am coming from Yamahas and Hondas - I immediately noticed that the KTMs are less responsive on the bottom. My riding style has become very dependent on low-end snap and after research, I now realize the KTM's default throttle-pull rates are slower, by design.
(2) Given my Yamaha and Honda experience, I found myself holding the throttle open when I didn't want to because my brain/wrist thought I had closed the throttle on the KTMs, when in fact I was still holding it open slightly --- which led to some hairy moments as I was learning these new bikes. I'd like to eliminate this difference between the bikes.

Wow those motion pro cams are much wider rhan the stock style cams. To fit the G2 00K cam (30%) I had to dremel off this nib in the stock housing

Yep - that's the path I'm on now: G2 Ergonomics

I wanted to see what level of modification I was looking at w/ the Motion Pro approach, just in case it was minimal, and I also wanted these pics available to others looking into this path to know what they're up against if they were playing with thoughts of modification.

If you ordered the 2023+ grip set it should have came with a white cam that is faster than the black or gray. It is used in the 2 strokes. You will need a 23+ housing too. 

Are the 2-stroke and 4-stroke cams interchangeable on KTMs?

I always thought 4-strokes had the 2nd cable as a safety to ensure the throttle slide couldn't get stuck in its travel anywhere due to the higher intake vacuum levels, whereas all 2-strokes I've ridden only had one.

2023+ TBI two smokers have dual cables, like the SXF line, now. One more design worth testing!

Outstanding info - thanks @wrc777 and @crc245!

Just purchased a 23-25 throttle housing and will work the 23-25 cams into the experiment soon.

Tpi cams were the 4 stroke cams and the enduro tbi bikes use the current four stroke cams. The xc/sx tbis have that new white cam which is a lot bigger diameter than the 4t cams. As far as I can tell the only reason the throttle housing was changed was to fit that bigger cam.

White cam diameter is about 44mm

Gray is 37, black is 39.6. 

Wowser- that jump to 44 - will compare to the G2 Ergo parts when they arrive (I ordered the +10%, +20%, +30%).

It'd be great if I can finally get these bikes dialed!

Appreciate the info being shared in this post! I'm on a '21 FE350 and find that while the low-end is very forgiving for techy, rocky riding, it doesn't give much in the way of snap when trying to boost over small trail doubles or other air time features; instead it requires being wrapped on the upper end of the throttle / rpm range, which amplifies the engine braking effect if the throttle is chopped. I was okay with this arrangement at first as I had been off motos for nearly 20 years when I got this bike, but now that I have enough riding time to start to feel comfortable with the bike, I'm wishing for some more snap off the bottom end. 

Interesting insight on the skinnier tire size; I'll keep that in mind for future tire considerations! 

@Rider 5280 Any update on these tests? 

I am currently running the following setup / differences over stock:
(1) +20% G2 Ergo throttle cam
(2) Twisted Development programmed Vortex ECU running 91-octane premium pump fuel
(3) Full FMF 4.1 RCT system
(4) 2-stroke air filter cage (no screen)
(5) 53T rear sprocket (on recommendation from Keefer's site)

The above setup got me close to the "snappiness" level I like ---> I'd say 85% there ---> Then I started adjusting the fuel trim dials on the Vortex ECU. This is where most of my gains are coming from for the engine feel I am seeking. Specifically, I started them all at 5. From there I lowered them each -1 step at a time. After chasing the power I liked by trying different maps, I settled on a few specific maps that were snappiest and then further tweaked the trim dials (I'll have to go look at what maps those are).

For my elevation of ~5,280 feet at my local MX track + ~6,500-8,500 for the mountain singletrack I ride, I've found all trim dials set = 4 is closest to what I seek.

With this ^^^ above setup, I am ~ 90-95% satisfied and intend to try the +30% G2 Throttle cam and some VP T4 fuel to see if I can get there.

Again, my baseline elevation of just over 5,000-ft where you lose ~3% power for every 1,000 feet of elevation means I am down 15% for starters.

If I were at or near sea level, I am sure I'd be happy with this engine already --- even with the "slow build" power these 19-22 generation 350 (and 450) engines seem to have.

Hopefully this helps and as always, I'll add more details when rides/time permits.

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NOTE #1:
The 19-22 KTM chassis bikes are still the best handling bikes I've ever ridden. I may honestly prefer them over my 2008 CRF450R - TBD (the ergos on the Honda aren't as good IMHO, but Honda has better "wheelie-ability") --- which feels like blasphemy. And they totally put my Yamahas to shame ... but the Yamaha suspension is oh-so-sweet in stock or A-kit form, so it narrows the gap. I still haven't tried the KYB spring-conversion forks on my bikes yet, so maybe Nirvana is around the corner, dunno (yet). But the KTMs are sooo good chassis-wise that I've been just focusing on riding when I can without mods because they are "good enough" stock and hella fun.

NOTE #2:
I would probably choose the Yamahas for MX given their ability to punish you less via the excellent suspension + more forgiving aluminum frames. The KTMs are my favorite for off-road riding, especially singletrack --- at current time. I expect to close the gap on comfort with the Yamahas, but honestly, we're talking apples & oranges when you get down to chassis philosophy I think. I've talked with a few KTM design engineers about this and they really are after a very specific feel that I've not been exposed to before. It's intentional, for sure.

NOTE #3:
These 19-22 KTMs (350 and 450) are the only bikes I've ever owned where I frequently and accidentally keep some throttle open when I expect it to be fully closed. THIS IS SCARY. This has happened even with the quicker-turn G2 Ergo throttle cam, so I suspect (don't know yet) that the throttle-turn rate on these KTMs is STILL slower than my Hondas and Yamahas. If true, this explains, in part, why I am not fully gelling with the engine feel yet.