Predator 420cc Performance Mods! 

people doing diy project in youtube should exactly follow your way to do it, clear video, no noisy music and does not have other bs unrelated to the project, good job kid.

Best DIY video I have ever watched. Not just showing how to do something, but also explaining exactly what everything is. I learned in this one video everything I had questions about. Anyone who is looking to mod a 212 or 420 should watch this video before even looking at a screw driver or drill. Thank you, sir!

Thank you for the video bud. There's a lot of 420 mod videos out there but yours was by far the best and easiest to follow and I appreciate you sharing your time and knowledge 👍🏻

Tip: put grease on your tap then it will both lubricate the threads being cut and the grease will hold 99% of the shavings too.

Confident in knowledge, well structured content and presentation style coupled with excellent photography made this a great video to watch, well done.

Again I have no idea why this kid doesn't have more subs, such an engineer giving this vid a heavy like.

The throwing the paint on it bit at the end amuses me. Nice video. Well done. Your experience with these kinds of engines really is apparent.

It is practice to put air pressure into the sparkplug hole to keep the valves seated while replacing the valve springs. Very nice video, thanks for sharing.

Watching you using that vice-grip to push down on the spring, I just was waiting to cringe when it slipped and either smashed your finger or sent the vice-grips into your face, glad it all went good!

Get yourself a valve spring tool and save yourself potentially serious injury with either the spring or retainers shooting up into your face, or the vice grips pinching the devil out of your thumb. You can also save a fishing expedition into the crankcase for the retainers that way as well. You can also get a truck brake spring driver (used on drum brake barrel shaped springs that hold the shoes to the backing plate.) It has a screwdriver handle and shank with an open ring at the end that compresses the spring as you push down, while allowing you to rotate the retainers. The retainer tool for trucks should be the right diameter to cup the spring and the retainer cup on top of your valves so you can place the retainers in the cup and stem of the valve.

Probably the best video seen for mod 420 Predator thumbs up

This guy is like 24/7 in his garadge!!! Love your work dude! Keep it up!

Your delivery of this informative video is second to no one. Fantastic presentation.

That was the best DIY mod I ever seen! I'm referring to you painting the shroud to make it look cool!!!!

this channel is so underrated

the paint edit was pretty good not going to lie

So cool ! Can't wait to see how does the engine run !

I spent an hour looking for one of my keepers didn't have a good grip trying to put the spring back in and shot out with everything in it I almost cried. Wish I woulda watched your video first.

Really interesting video by a young and upcoming engineer! Really enjoyed it! No bullshit, a true professional! Thank-you!

Took me years and years to learn how to hold a drill straight and plumb when hand drilling a hole. I’m 50 now and can only now promise that I can drill a hole straight in! Don’t let that bother you especially if it WORKS when you’re done.

That thing you did with the red paint can was pretty cool👍👍👍

"Because... I can". I love that.

u did a nice lil video here. u taught me something. now ill have no problems doing these same mods when its time. im impressed. i love working with engines and metal. like welding. i worked at a lil aluminium boat factory and taught myself how to tig and mig aluminium. even anodized aluminum. i thought aluminium was tricky to weld. took a welding class in school to weld mild steel and iron. i have alil mig, tig and stick welder combo. i can even gas weld. again. nice vid lil brother. never stop learning and showing ur skills. u have a nack at it

I thought I was doing good tuning up my GX390 on my pressure washer. You Rock young man . :)

"Because I Can" best reason ever

Just throw that paint! Too cool. Enjoyed it. Natural communicator, you are. Well done. I see a video series for sale in your future. A lion in the chase never looks back

I have a 420 in a Ducar wood chipper and was wondering why I couldn't get full throttle --- it was the governor -- thank you as your video helped explain it!!

Really glad I found your channel. You really explain everything and you still manage to make the video have a steady pace to it. I got into small engines by watching the channel Cars and Cameras, but recently I'm liking your channel much more. Keep it up and you'll do great things.

Lots of good editing and tricks. Really liked the string at the end.

I love how you where spinning the engine around with string

Those thingies that you're calling "pegs" are studs. You're welcome. 8-)

again, this kid is great! I like the custom adapter for the air filter. also props to the paint job. that had me laughing! keep up the good work real steel.

Laughed at the painting :D And awesome tip with the spongy rope thingy! I might use that some day

Great video sir. Will use this as a reference when I move to a stage two for my 420! Thank you!

Just to let you know the other method of holding the valves in place is air pressure by installing a modified fitting with a air hose hooked to your compressor to the spark plug hole.

yes i'm looking for a tool for the valve springs. i am having trouble on my predator 301....great video young man!!!!

Thanks for the lesson on how to do this correctly in the process of changing my golf cart to gas engine

This is a very informative video awesome job man.

Good explanation and informative 👍

great video! instead of removing governor, cant you just disconnect the linkage? instead of removing low oil sensor, cant your just disconnect the wire?

The filter I bought came with the adapter and a hold down for the choke, the spacer (I bought separate) had the correct holes in it. Also came with a bigger jet...I can't recommend using the bigger jet , the engine runs better and comes off of choke faster with the OEM jet it came with.

he knew what lash caps are.....well done

This video was awesome 👌 no bullshit straight forward good job thank you for making this video

brasil- rio de janeiro: faltou ligar , pra ouvi o som! ( missed calling to hear engine sound!) I saw that you are building a motorcycle with this engine! congratulations .. you are a smart guy!

Do they still have small engine class in high school? They did when I was a kid (35 years ago). This kid would be a great teacher for it.

A+. Extremely well done.

You can use air pressure to hold the valves back using a compression guage hose & air hose nipple ,Get yourself a round brake anchor pin tool great for doing valves too .

When tapping the Governor hole put a tac cloth in there and / or hold shot glass under the hole to catch the metal shavings.

thank you for the quality step by step!

your vidios are so good that i can watch them again again again...

You the best paint thrower I ever seen ,,,,,,,damn

you are the same as me. 24/7 working on cool shit

Thanks for an informative and nicely produced video. One question, though: couldnt you just replace the spring from the throttle arm to the governor arm to raise the rpm while thus raising the max rpm while keeping the limiter function? Thx.

Young Master, Thank you! I have liked and subscribed.

Was hoping we would get to hear it run

Dude you’re awesome

One of the Best Videos.

Great video 😊

Could fill the cylinder w air through the spark plug hole compressing when removing n installing the valvebsping n valve spring seals . But all in all. Awesome job

Like the paint ending !!

excellent presentation. Well done.

This was fantastic. Do by chance have part numbers for anything?

23:20 - "This Old Tony" - Awesome!

Great job !! very well executed nicely explained.. Just Subbed

Good job you will go far!

Good job. Those areas where small parts fall into are called "hell holes"...always plug/cover them before taking stuff apart that could fall in there....I think you figured that out though.

[ On the choke lever ] i drilled a small hole in the lever like you would for a screw. Then i made a few grooves angled downward in the shaft. I mixed up a little JB Weld ,fingered it into the shaft grooves then shot some into the lever with a crack filler syringe. When i pushed the lever down some epoxy came out the top hole and i finger molded it over like a little cap. that was 10 yrs ago and it's still on there. PS i used my dremel for the grooves.. I knew if i tried to drill and tap that shaft i would F#%k it up..lol

Paint job straight outta "This Old Tony", lol

THANK GOD you bought a pre-drilled ported Main jet Bc given your drilling skills you probably would have gone through 3 of them before you got it right

Nice video man thanks a lot

Thank you for this nice video and explanation

Good job mate

nice editing on the paint

Nice video, very helpful 🙂

GET YOURSELF A SPRING COMPRESSOR AND A FLEXIBLE MAGNET

Just a thought, a small putty knife, very thin and flexible work well to help save gaskets.

awesome video bud thanks

I've never thought of inserting lots of small pieces of metal into the carb body? P.s. good video thx

A brass soft plug is my preferred mod for the governor shaft plug.

Nice tutorial

cant u just remove govenor link on outside of engine,without removing internals?,if it dont close butterfly valve it dont govern it ??

You'll find a nice performance increase by using an offset flywheel key to advance the timing by about 2 to 3 degrees.

That, because I can line is my favorite to use 😂

All that work you should have put a bigger cam in and removed the balance shaft !

If you’re worried about not being able to get all the backer rod (sponge thingy) out of the cylinder, you can use an air hose fitting to screw it into the spark plug hole and apply 100psi air to hold the valves in place. I’ve done this multiple times when replacing valves springs on Chevy LS motors while it’s still in the truck. This was a great video, and I doubt you’ve put it on a dyno to see the power increase, but do you have any idea how much power increase you got, or how high you can rev the rpm’s?? I know the factory governor had it at 3600 rpm’s.

If you don't change the emulsion tube that drilled jet won't do shit. I'm not being mean I'm just giving advice.

Very clever and well presented, knows his stuff.

Tight is right. Too tight is broke!

I fucked up big time. I watched the whole video. I’ll never get that time back. It’s gone forever.

Can you just leave the governor arm and rod on if you just remove the flywheel? Or does it all have to go?

He's got a Lathe - But he Does'nt have the proper size wrench to set the Valve Lash.!.!.! I hope that you've got one by now - - - And invest $12 dollars on a Spring Compressor. . . Why did I comment on your Video ? ? ? Because I like you. . . Good Stuff Man

Where's. Your valve spring compressor?

bro your the man

Great stuff

imma use his method of painting the next time I paint😂

Great vid very helpful

LotSa Extra steps but really nice job on the adapter.

Good info... thanks.

13 hp to 20 just with those mods ??? I dont think so

That thick carbie gasket can also be found on the Honda Buffalo lawn mowers