HOW TO: Semi Auto Fixes/Cutoff Lever Explanation

[@RegArtwork]

8 years later you solved my problem dude. Many thanks

[@Kovahusky1013]

Same but not 8 years just one

[@austynburfeind3319]

Thanks for this video man, I've been having a lot of issues with my cut off and semi auto, and this literally helped me fix my issue. Many thanks!!!

[@mattwright9485]

Very good demonstration explaining about the loss of semi auto.and the operation of the cut of lever. Thanks mate.

[@michaelwiff2576]

Thank You for this video, I think the problem I had was the trigger switch, the 2 thin metal plates, I did what you recommended and my semiauto function works like brand new, Thank a lot man.

[@elblitzb]

y have NO idea what could be wrong with my hk416...and after seeing your video it's obvious: Nothing broken BUT worn, that's why i did not noticed anything. Thanks man...really, you saved me a lot of money. Greetings from Chile.

[@marcofreire]

Brand new Specna Arms SA-E19. Semi-auto issues out of the box. On semi-auto it will 2/3 rounds burst, full-auto or just lock the trigger like in safety. Great explanations. Thanks.

[@sogerc1]

Thanks, I'll check for these problems. I have a brand new LCT that has a hundred other problems beside this one. Everyone is so hyped about them and I received a piece of shit. This is the first and last LCT I bought. People say LCTs come with perfect shimming, my sector gear was so tight the gears barely spun, and the other two were too loose.

[@TFRangers1]

Hey man. Thank you so much for this video. I just learned a lot. Please keep making videos like this one!

[@austinaquaponics]

well done sir... I like how you stayed on point and explained everything short and sweet.

[@tommyjones1943]

thank you, new to the tech side , this video was an excellent trouble shooting video.

[@slidsarge225]

so my problem is, my FA works, but my Semi and Safety are both just safety, problem is, its a SR25 and I want a DMR not a saw

[@crazywyvern4704]

I have the similar problem, but both my semi and full auto are full auto lmao

[@papalisgaming5658]

So i bought my airsoft replica like 10 months ago haven't played too much since summer , came back from the vacation and suddenly the gun does this weird thing (M916G UTR556 the replica) i am a complete airsoft noob and i have no idea what's can cause this especially in a almost brand new gun with like 10 games on its head , So it starts with if i put the gun on semi the moment i connect the battery it does nothing the moment i put it on full auto it shots burst (obs cause i programmed it that way on auto ) but when i go back on semi it does the same thing shots in burst , A small remark i did damage abit of the cable when i was trying to change the spring and i applied electrical tape to fix the small wiring damage i caused maybe it the issue , but it was working fine after that so i really don't know, and i have tried to reset the mosfet burst setting and all that still does nothing any help

[@MarineSharpshooter13]

When I use semi, and fire many rapid shots, every once in awhile after many rapid semi shots, it just clicks when i pull the trigger. I resolve this by switching it to full auto, and firing, and it somehow resets. Would you know off the top of your head what could be happening and what to do to fix this? Personally i think the trigger is just mis engaging.

[@valleyriverarms]

its a little bit of overspin putting the cutoff lever in a weird position that locks up the trigger trolley. I can't really think of a good way to fix this besides AB which I don't recommend. Could try shaving some plastic off the trigger trolley so it stops quicker.

[@MarineSharpshooter13]

valleyriverarms Could this also be resolve by short stroking? My gun is not running too fast, its a 9.6 volt battery with Deans connectors, Standard 18:1 gears with an ICS turbo 3000 motor. Would taking a tooth off of the sector and piston help?

[@valleyriverarms]

possibly... but I'm not sure by how much. If you don't make full presses to the rear and "short stroke" the trigger it can cause this too.

[@MarineSharpshooter13]

valleyriverarms That makes sense, I guess when I take many rapid shots, I might not make full trigger presses. I'll experiment some more, I'll take many rapid shots, while making full presses, and see if the problem persists

[@valleyriverarms]

I would try that. You might be able to solve that problem with a higher torque motor in that case. Try to shorten the cycle time.

[@greenfrog5647]

My cyma aks74un will have the seletor on semi, but when i pull the trigger halfway it shoots full auto. When i pull the trigger the full way it does semi. Ive added material to the moving part of the trigger (idk if its called a shuttle or a trolley) so it has material to interact with the cutoff lever

[@valleyriverarms]

I used to have this problem too. Might be worth trying to replace the trigger contacts and the cutoff lever and cutoff spring to be safe too

[@OTG_Zulu]

I've looked everywhere and i cant find anything on this problem.....my gun will not fire on semi, i mean if i pull the trigger back and find where it would usually "break" (real gun lingo for where it would start the firing process) and move it left and right while still pulling the trigger it MIGHT fire one shot. It never goes into full, it never bursts. Just one shot and thats it, if it does fire. However, in auto it works like a dream, no issues at all. Any ideas on that? Anything input would be helpful. Oh and just to rant a lil more......the gun is basically new, it hasn't even seen 5k rounds through it.....

[@ramrcadventures7168]

Awesome video, in semi i have to pull the trigger all,the way back fot a full semi cycle or it will work like a 3 round burst..or just not shoot full and or semi..thinking something is worn down?

[@lmJustGood]

Trying to install my shims and I noticed its incredibly hard shimming on ball bearings...? Anyways... My sector gear keeps hitting against the "pin" that connects the two shell halves together and just stops OR the cut off lever...? Don't know which as it only happens when both halves are on...? Is that the point of the cutoff lever (to completely stop the sector gear from spinning at the same point every time) or do i need to shave the gear or "pin" down any? (The Pin is part of the lower half of the gearbox and makes it so the two halves can't come too close together)...? Thanks!

[@Rzut-Oka]

Hi i have only full auto, when i change that part 2:06 now i have single fire only..?!? How set auto on a auto fire switch position?

[@valleyriverarms]

try cutting a coil off of your cutoff lever spring

[@tachanka697]

Sorry, I am very late, but in semi if I slowly pull the trigger back it starts shooting full auto however if i quickly pull the trigger all the way back it shoots 1 bb, like it's supposed to. Do you know what might be causing this? I am new to airsoft so would I be able to fix it myself or would I have to take it to a store to get it fixed?

[@valleyriverarms]

depends how comfortable you were with opening it yourself. it sounds like you needed new trigger contacts

[@minzy102]

When I select semi, sometimes it shoots semi, sometimes a burst and sometimes full auto. Is this the same concept? I have a high torque motor and high speed 14:1 gears fitted. I will replace the cut off lever anyway, but if it is overspin, how can I fix it?

[@valleyriverarms]

overspin is either fixed with shortstroking and a higher power spring or active braking on the mosfet.

[@ChasWG]

Great video and explanation of the cutoff lever and trigger contacts. I've been messing around with my son's AGM M16A3 for a while now. First I had to replace the crappy stock trigger contacts. I got a set of Modify trigger contacts and trolley. But after I put that set into the gearbox I suddenly had issue with it shooting full auto in semi. All the parts look fine, including the cutoff lever, but the plastic wedge that contacts the cutoff lever on the left side of the trolley doesn't appear to be as wide as the on the original trolley. Could that be why the gun shoots full in semi? I have messed around with the spacing of the trigger contacts quite a bit. Nothing seems to help. Any clues? Thanks

[@valleyriverarms]

Try the stock trolley in the modify contacts and see what happenes. If it works with the stock trolley yeah that's the issue. Although i think it is that.

[@ChasWG]

Thanks for the idea. I did try it in there, but the stock trolley kept catching and hanging up on the slide part. So I never fully assembled it like that. I Di end up spreading the two contact springs much wider appart and that has seemed to fix things. The trolley now has to fully engage the cutoff lever forcing it into the cam of the sector gear now to actually make the electrical connection and fire on one round.

[@Cninja.]

My gun is shooting full auto in semi auto fire mode, how do I fix this. I can't seem to find a solution to this problem

[@valleyriverarms]

did you try replacing the cutoff lever

[@ogitstigo]

is it possible that i need to change my sector gear and my selector plate to bring back my semi automatic? my micro switch broke so i changed it with a normal switch. but it's only firing full auto. so do i need to change my sector gear and selector plate? thanks!

[@spencerhurley8359]

I'm pretty savvy on all this stuff, but my ver2 gearbox is half-cocking after every shot on semi, what's the likely culprit? all the parts are good on my build

[@valleyriverarms]

you're probably experiencing overspin. You need to slow your gun down or put in a stronger spring to induce more of a mechanical drag.

[@Wzrd850]

My semi auto works, but when I put it on auto, I get a two or three round burst. I can't find any info on this, and wanted to know if you might have any insight. I have a springleft over that is slightly larger than the one between the selector and cut off lever, and have no idea where it goes. Thanks.

[@valleyriverarms]

Logan Brooker So... your cutoff lever spring is installed or is that what's missing?

[@Wzrd850]

I have an extra spring that is larger than the spring between the cutoff lever and selector plate. Same compression style spring, but too big. I have no idea where it goes.

[@MrAsianAirsofter]

When a normal sector gear rotates 360 degrees it engages the cut off lever once. In a DSG it engages twice in that 360 degrees. Is it possible to make a DSG build that shoots a 2 round burst (like an AN-94) on semi auto? Possibly ground down one of the points where the gear engages the cut off lever?

[@valleyriverarms]

Yeah you could grind off one of the cutoff cams and get a two round burst if you wanted to I suppose. I personally wouldn't ruin a set of riots like that but if you needed 2 round burst that's a way to do it.

[@MrAsianAirsofter]

Where do you get your DSGs? the only place i've found that has them is ASGI adn they charge 115 for the entire set. Do you have a alternative?

[@valleyriverarms]

clandestine airsoft, hivemind airsoft, and direct through riot.

[@vladislavtyshkov6607]

You said that if we have an issue with overspin I should look at the video on overspin, but I am not able to find it. Can you please add in the description the link to it?

[@valleyriverarms]

+Vladislav Tyshkov kzbin.info/www/bejne/aZmQlX2le7ahq6c covered here

[@e-man4967]

Trigger jams in semi. It's just not firing and clicks about halfway. It works fine in auto. What could be wrong with it?

[@valleyriverarms]

E- Man +E- Man timing of your cutoff could be off. What battery are you using?

[@e-man4967]

valleyriverarms 11. LiPo. Thanks.

[@fuckdat6207]

hey Ryan I was wondering my gun has really wired problems it acts like low battery when I have a full battery do you think that's the problem I always use semi

[@iilimato18]

Nice video, but can you tell how the trigger gets jammed some times when semi auto? I have tried to find reason for that. I understand usually the problem is to fast trigger pull, but what makes the trigger jamm like it is on safe? Is the cutoflever preventing the trolley to push forward, if so should in go away just switching to full auto what lifts the cutoff allthe way upp but it does not i have to shoot burst to make it go away.

[@valleyriverarms]

yeah it's bad timing with the cutoff lever which is why switching it to full then back sometimes solves the problem.

[@iilimato18]

Is there something that can be done to solve this issue? And i have AB mosfet + HT motor in my system.

[@detaildemon2904]

My sector gear does not move the cutoff lever when i put them in the gearbox and spin the sector gear? Would that be the cause of only full auto?

[@valleyriverarms]

yeah. make sure you're spinning the gear in the right way too.

[@Gattobuono]

Nice clearly explained video, thanks

[@brandon1770]

What if I am having this problem but with a green gas pistol it will shoot on full auto but not semi. Please help me. Thank you.

[@valleyriverarms]

Brandon Henk lol totally different mechanism and a million other possible issues.

[@damiangilliam]

If I press my trigger to hard on mine it will not fire it sounds like the gears don't make a full rotation but it only does it when I press a little to hard

[@valleyriverarms]

+damian gilliam Check to see if you're trigger contacts are in good condition

[@nainch5860]

Thank you very much for this tips, I've finally found why this f***ing guns doesn't work^^ Very usefull

[@valleyriverarms]

glad it helped

[@jose-desmenriveraortiz4654]

Hello, thank you for your time doing the video, having trouble, m4 v2 when putting the battery goes full auto. .thanks to this video now I know why my semi isn't working but still having the problem that when the battery is connect to the m4 goes full without pulling the trigger. . Do you know something about it?

[@valleyriverarms]

your wiring is shorting somewhere. Check your wires to make sure that your wires are all properly insulated and your trigger contacts are not too close together.

[@jose-desmenriveraortiz4654]

Thank you, yes checked that and re solder, but yes a have to keep checking cause has to be a short something touching the gear box

[@TannonRounsaville]

So when you plug in your battery your gun is ghost firing? Cause that's what happened to me recently

[@valleyriverarms]

That means that something is shorting and completing the circuit. Check your trigger contacts or mosfet

[@rasmushenkel4444]

When i shoot too fast in semi, the gun will sometimes stop shoot for a while. Imagine like its overheating, and it needs some kind of cooldown, it feels like that... So cant figure out why its doing this. i have a 25C 11.1 lipo 1300 mah, and i recently installed a high torgue motor. I was wondering if it had something to do with the battery or something idk. Its wierd

[@valleyriverarms]

weird. hard to say, you might have a loose connection in your wiring somewhere

[@thegetstuffdoneguy8120]

I have a problem where my aeg fires a double burst sometimes in semi and when I put it in full auto my gearbox seizes with the piston stuck all the way back. Inside the gearbox I found 1 of the trigger housing trolleys has broken. Could this cause the double fires in semi? Also I know the cut off lever moves out of the way to around 45 degrees in full auto but if the trigger trolley broke is it possible for the contact block to bump the cut off lever enough to engage the sector cam and hold up the sector gear and seize the piston in the rear position? Stock 18:1 gears, SHS 15 tooth piston, piston head and air nozzle. Thanks

[@valleyriverarms]

yeah that's probably your problem. The cutoff isnt interfacing correctly with your contacts

[@mandrakevermilyea7488]

I've got an LCT Ak74m, I had a gear box lock up u fixed by removing the motor and disengaging the anti reversal latch, re assembled my gun shoots only semi auto, meaning in the safe, semi and auto posistions my gun fires in semi auto. What's up how do I fix?

[@valleyriverarms]

might be your selector is broken or the cutoff lever is locked or something

[@monteray25]

My g&g fn2000 has this problem it will just click when trying to fire in semi and sometimes it will fire two bbs at a time but full auto works just fine. I've been researching a bunch and alot of people are having this problem with the fn2000 the gearbox in it is a version 6

[@Monotonous]

Andrew Miller I'm having this issue with the cybergun version, did u ever find a fix?

[@nicolas7183]

thanks for the info you fixed my problem

[@kenba96]

hey i just change the cutoff lever to an prometius, and innstaled a SHS V3 trigger unit, 13:1 SHS gears pluss a SHS hightorqe motor and am using a M100 spring and i still have the problem that it wont fire semi any sugetions? this is on a LCT AS VAL

[@valleyriverarms]

It's probably overspinning. The gears are moving too fast to stop after the shot with that weak of a spring.

[@beastairsoft3888]

My trigger gets stuck in semi auto... What could cause this?

[@valleyriverarms]

BEAST Airsoft trigger spring is broken maybe

[@beastairsoft3888]

valleyriverarms I wish it was that easy... But trigger spring is good I'm going to try a few things but this gearbox I built from scratch so who knows what it is

[@ariesaguilar6442]

Hi! My gun has v3 gearbox and it shoots full auto in semi auto when it is loaded but when its not loaded it shoots fine,i even remove the thing that conects for the full auto but still it shoots full auto in semi auto mode could you help me to fix it? Sorry for my english Hope you understand what i want to say.thanks

[@valleyriverarms]

strange. Have you checked to make sure no wires are being pinched?

[@patticromer9369]

I keep putting new trigger trolleys in and they keep wearing down, even lonex triggers are doing it within 100 cycle's. I have had a lot of problems with guns but never this. There's no hair trigger mod its just the basic trigger assembly. But I do have a lot of experience with guns and have built a lot of different hair trigger mods and messed with the trigger before I'm just saying I know what I'm talking about but I cannot figure this out for the life of me. It does have a gate active breaking mosfet and I think that may be the actual problem somehow not too sure.

[@valleyriverarms]

Try smoothing out the top of the trigger where it connects with the trigger trolley to keep the abrasiveness down. I doubt it has anything to do with your mosfet though.

[@jaskamakynen7766]

Have you fixed L85 type gearbox semi? It's a bit of it's own world it seems as semi is completing the circuit not through these 2 contacts but another contact on the side and one of the metal plates. The metal plates are of different length on purpose

[@valleyriverarms]

unfortunately I've never worked on an l85.

[@raincityairsoft9727]

I put in a brand new lonex cut off lever into my gun but it still shoots 2 shots on semi. Pretty positive it's overspin. Any idea how to fix it??

[@valleyriverarms]

heavier spring and shortstroke

[@raincityairsoft9727]

I currently have 3 teeth short stroked. I also have an M110 spring in it. Was gonna bump it up to an M120. Would that do the trick?

[@valleyriverarms]

m120 should help a lot. Possibly adding an AB mosfet too if you end up needing it.

[@raincityairsoft9727]

Ok thanks. My build is pretty high speed so I don't think I'll need an AB fet

[@oporigamiesport_mlbbsquad4339]

Bravo thanks bro for the info..,👍

[@boombots74]

cant seem to locate the video on overspin link plz

[@valleyriverarms]

It's the shortstroking video i think. Just browse though my videos for the shortstroking video

[@zacharycollins9171]

Hello, I have a krytac trident mk2 crb and it is a fairly new gun. Being in SoCal I have to stay indoors to play and that means semi only, but at times it automatically switches to full while still on the semi setting, any suggestions on what to do?

[@valleyriverarms]

your trigger contacts might be sticking? hard to say though without seeing it.

[@zacharycollins9171]

valleyriverarms Thankyou for the response, ill take it into my local shop to see what is up. It only seems to happen with my 11.1 lipo

[@Trevh3]

What are your thoughts on Tienly motors? The new gt45000 seems pretty good?

[@valleyriverarms]

I've always thought they they weren't bad but kinda pricey. Always been more partial to Lonex myself but I've seen what Tienly's can do and they're not bad.

[@Zetrow555]

Hello, my semi auto wont work, and i have checked the Cut off lever and it looks fine, But when i put every thing together it only shoots Full auto, you have any suggestions ? :)

[@valleyriverarms]

+Zetrow555 makes sure the nub on the sector gear that contacts the cutoff lever is working correctly. Also make sure the cutoff lever spring is still there.

[@Zetrow555]

Its working correctly :/ and the spring is there :( its pretty sad ? do you have any other suggestions ? :)

[@benjiusa6324]

Look at your trolley and see where the cut off lever hits and see if it hooks on it or slides off. That could be your problem(if it slides off thats is bad :) )

[@AbuGuroza]

i bought one from E&C for my dboys m4 v2 gearbox, turned out it loose too much and wiggle, when i put the gun it just semi twice, and after set to auto, it back to full auto again, the shuttle "triangle" is looks good tho

[@valleyriverarms]

try and find another brand. Something from another cheap chinese gun might hopefully work.

[@AbuGuroza]

valleyriverarms yep turns up an unknown cheaper chinese branded military action got a bigger teeth even though the hole finish coulb be risk and for now single shot works flawlessly Saving for steel one from guarder currently

[@BAHABMENJAMAN]

hey man what brand has the longest lasting cutoff lever, the zinc ones dont last me very long at all

[@valleyriverarms]

guarder

[@khougar]

thank you for saving me! :D

[@vsuryaR]

How about semi auto issues that inherently plague v6 gearbox? (P90) Whats the problem?

[@valleyriverarms]

not as familiar with that issue. I'd say its a trigger contacts issue

[@bb9120]

Thanks...

[@whatamess1226]

Once again, i arrive back @valleryriverarms to solve my problem. thank you!

[@valleyriverarms]

glad to hear it

[@jesuisFORTIO]

a mosfet can protect your trigger contacts, but soon or latter this problem will apear because of the cutoff lever? Correct me if I am wrong. Nice video btw sir, i wish i could work on a aeg like you sir, i invite you to check mine.

[@valleyriverarms]

trigger contact wear has nothing to do with the wear on the cutoff lever. There's no real way to prevent cutoff lever wear other than getting a stronger cutoff lever.

[@Scrufboy]

Spellcheck that title bro.

[@RekzysTheTitan]

Asked a friend for help fixing my g36. Thought he knew mine was gas blowback.

[@valleyriverarms]

no idea how to work on those