I can’t believe no one has pointed out my (easter egg) grounding to the rubber valve breather yet 😂

Pro tip. some 1/4" rod with a slot cut in the end. cut a strip of sand paper and put it in the slot. Put the rod in your electric drill. Cheap as and effective for porting and polishing aluminium heads

Professionaly speaking: this is 1 of the most informative & down to earth how tos I've come across.Just tell people other than your sponsor where they can get parts etc.Cheers Trev New Zealand

I'm so glad You made this video on this engine. I've been waiting on a video like this for years... Thanks Bro.

Bro this is awesome been working on powers saws tuning and porting and modding and getting back into these small four strokes very well done were do I sign up for class love it bro helped me considerably

Solid video man. Love to see the 79 predator instead of the damn 212. I think it's super under rated because the size diff between the two is significant

Intro got me . The test bench ........ glad you’re good

Great tips for the DIY, And JB Weld to the rescue.

I would definitely change out that flywheel to billet just because that stock flywheel won't last long with the upgrades and will detonate eventually other than that awesome vid and I too followed ur port abd polish and made a significant difference in my 224cc pred so thanks.

I just put one on a mini bike called Microbikology. It's coming along rather well considering the displacement. I hit 22mph using a jackshaft setup from BMI. I'm 5'11 235 😏.

I'm about to have a Fully built 79cc Preddy. About 7hp. She's about 5.5hp now and on my Stand Up Scooter 😁 Blood Thirsty.

I don’t believe I’d be hanging on to that flywheel cover after the first close call. At least step out of the line of fire. Any idea where to get performance parts for a Honda G100 k2 or clone?

Love AGK they have everything you need for the p79-p212 and the tillotsons

Happy to subscribe my friend.❤

Great vid, just what I was looking for. Planning on doing the same thing to a 79cc Lifan, for a motorized bike. I even bought the same carburetor a couple weeks ago. I have heard that the 79cc Lifan and 79cc predator are very similar other than the angle at which the engine sits.

I wonder if you could find any cheap roller rocker arms that would fit. These would some great mods for one of those 79cc Phat moto bikes.

when i modded my 79cc predator about 6 years ago there was no after market parts for it but i am a fabricator so intake and exhaust was a breeze . only problem it has is valve float but it sounds wicked.

is the head springs rockers and pushrods able to be used from 212??

Чувак, тебе явно повезло! Хорошо, что кожух не пробило! Я свой раскручивал то держал ногой в строительных сапогах! 😂

Do you actually run that muffler for normal riding? It seemed very quiet. Where can I get something similar for my 212? I was sure happy to see a flywheel blow up. Been wanting to witness that for a while. Thanks for wrecking a flywheel for us.

I had a rod break on a mini bike before part of the rod came out so violently it landed in the neighbors yard. I wouldn’t be Reving the engine like the being so close to it

If I were to send my 97cc motor can you upgrade it to a stage 1 with removing the governor and polish and port the head upgrade the carb n jet and update the fly wheel

A $20 tachometer might be a good investment!

What makes you think you're now making 7hp? How do you know? I don't see that big a gain without a cam change.

do you sell ready to go motors ? Looking to upgrade the motor on my Phatmoto with the upgraded predator 79cc

Can you tell me if the built right? Amazon 3 horsepower is the same as the other 79 c, c's, including yours.

Didn't see it in the vudeo, did you plug up the hole for the govener arm?

I would also suggest aluminum welding the compression section of the head for even more compression.

I'd love a video on Honda GX270's and the like! I've got one just sitting waiting to make good power.

Hello,why at 14:25 the engine is damaged? Why did you modify the timing key,right? Thanks,sorry for my bad english.

You need to make a Video on "HOW TO MAKE A PREDATOR INTAKE MANIFOLD" save us some money and teach us so that we can subscribe 😉

why dont you move the magneto plate on the flywheeel instead of modifying the timning key ?

Glass is a smooth surface for those looking to DIY the head surface

After tie governor was removed did you tap the hole and use a bolt or use a properly sized sheet metal screw to seal the hole?

Did u weld those pieces back on the Block?

I think if you were to put a degree wheel on your flywheel, that you'd find you've probably advanced it a lot more than 10°. I would guess that you've gone as far as 20°-30°. The easiest way to check is to print a degree wheel the diameter of the flywheel and mark somewhere on the engine how far 10° is. You can then index your flywheel accordingly.

What should be the value lash.

Is there any other company that makes a flywheel for the 79cc predator engine?

same thing happened with my stock rototiller engine magnet exploded and took the coil right off the block with it

the trick for me was a better head & gasket matched intake & exhaust ports by grinding both open and then sanding followed by a final buffing which leaves a mirror like finish. I made custom gaskets from scrap tin I had left in a roll from a previous task and it worked like a charm. Then I upgraded my ignition coil & spark plug. Then I tuned in my carb whih I customized the intake port of as well. The china doll engine loves to be carb tuned in to the air fuel mix aka ratio and the pin in it from stock I never removed I just used a flat screwdriver to fine tune the the one already inside. With my mods I clocked on a straightaway surface from start @54 mph and with a different sprocket setup Id probably get more top end speed but I like the torque in the mid range area that you dont lose that much speed with. Remember the larger your sprocket it the more initial acceleration will be present as the able torque that is also there on uphill angles. The smaller your sprocket expect less take off less climbing power/torque or pull based all on physics under the dynamic of a power source applied. It gets tricky and for me the best for my life is based on the roads nearby my home they are super rural and just got paved from rock/dirt FM roads to now newly ride worthy for any Huffy-Davidson you build Just make sure you buy parts from a good source and not Bikeberry. They are pride stricken on their price as much as they are stuck on their service which is lips as far as I can tell this far. Stay safe make sure your BRAKES WORK! or youll have scars like me for life. Regular bike brakes are NOT for added power so make the upgrades to the stopping ability the bike can have and enjoy your speed and power never stop experimenting! stay hungry yall! Great video good experiencing and knowledge is baseline keys to the kingdom!

Did you use stock flywheel key for billet flywheel or put in the advanced key?

What oil do use to brake in your motor?

I exploded one of the aplastic fans on those motors but never blew the magnet off like that

Any links to the follow up video?

How bad were the internals hurt when the flywheel tore shit up? It didn't sound to good after the flywheel replacement lol.

Didn’t you vac up the shaving when you shaved off the intake to Mach the head ? Think that would suck into the engine and boom 💥

Forged Iron crank and rod would be better for durability, especialy for that engine that care bout torq in low to mid RPM would be nice to

how do you get to the links for the parts used?

Can you tell me what my problem is? I did everything you said but it doesn’t move under its own weight and it just dies when it gets going

You have more faith in J-B Weld than I do

wasnt even revving that high when the magnet broke thru the screw hole/came unglued? i wanted to take the magnet out and re epoxy it after grinding the back of magnet and the face of flywheel and cleaning it with alchohol wipes for a FIRM BOND with the epoxy, but cldnt get the screw out... without damaging it. so gave up on that idea. superglue around the edge, for what good that is? as the $165 billet flywheel puts it in the 212cc price range

Where's the follow-up vid that you said you were gonna do showing the prformance difference between stock and mod?

What is the approximate percentage of increase in power with your mod.

awesome video. I have the same engine and stripped the 2 bottom crank case bolts and was wondering if there was enought room in the thread to heli coil it or whatever might work someone said use sum jb weld lol

can you tell me the heavy duty valve spring part number or what size and where to get it at?

When will u make a nother video of the built engine

Do you use that oil to break in your motor? If not what do you use

What's the name of the music in this video. ( 2:13)

Did not find the follow up vid???

Great video but Ebay and Amazon have the billet flywheels with adjustable timing without messing with the key the go kart company's try to resell them adding their 40% markup

Wow. Got to the flywheel failing and said, "Okay. This is what I'm not supposed to follow".

Couldn't you have turned the stator coil the other way instead of compromising the structural integrity of the Woodruff key? Just asking.

Why doesn't anyone ever mention the correct fuel to put in tank for engines. Great video but I would highly suggest an engine stand not a good idea to turn on an engine without it being stable

Dude... your grinding on your intake with it assembled?....

I was wondering why you didn't put a cam in it

that timing key blew this thing up

What web site is that ?

I dont get that thing about grinding the timing key. Yeah, I understand OFFSET keys, like an offset bushing on a timing chain. But if ya grind it thinner and put it in the original slot, wont it rattle? Wont the timing bounce around?

What do you guys think. Predator 79 or Huasheng 144? For a 1940s Hiawatha bicycle. I’ll cry if the bike gets ruined because the engine was too powerful

Another great way to not spend a fortune on high zinc oil. Rotella T4

Can you build me one if i send you my 120cc engine?

I've since learned that only polishing lightly on the intake is best. This motor actually benefits from fuel/air distortion created by turbulence. The reason being that it is such small displacement that most modifications to the carburetor will result in running too rich. The turbulence helps retard the flow so that the motor can catch up to the excessive air/fuel mix. Let it flow the best you can out of the exhaust. Also your best to run stock 196 clone springs to get the best possible torque curve while building rpm, lash them loose to .003 but keep the exhaust snug to grab that decompression.

Was ever any follow up of this video?? 17:10

Still waiting for the sequel

I'm sure it gave it a little bit more power made it run smoother and attack higher and yes I could be wrong but I highly doubt your modifications doubled the horsepower

No camshaft, huh?

Yikes! This video has some really dangerous shit in it! I appreciate the effort and some of the knowledge and explanations for sure. I don't make videos and really respect people that put work into sharing their knowledge and helping. That being said, holy cow! That woodruff key mod is really scary, dude!

No rascal update, bummer

The same thing happened to me I just don't have the money to repair

Why don't you bolt it down and that was cool when it broke

15:30

9 months and still no video of this back on the scooter?

Those springs are very off sized for a 79cc build. Stock is 7.8lb @12lb starts feeling like your starting a Harley. @18lbs you might as well toss you cam directly in the trash and save time reassembling lol. Plus you should be running 20w 50 with zink in a motor your about to abuse that is not designed for anything above 3500 rpm.

Why the hell tuned key

I think the 79 predator is faster than the 212, just the 212 has a faster take off

Put it back in car!!!!

You know 1/2 measures avail nothing. That scoot needs a Mitsu 3 Banger.

11:58 lol what?

DARN LUCKY IT DIDNT TAKE YOUR HAND... HEAD OFF!!!!! BOLT THE MOTOR DOWN...... U GOT 3 FT OF THROTTLE CABLE SO U CAN GET AWAY FROM THE MOTOR IN CASE IT BLOWS UP

The fly wheel broke because you pried on it to get it off. You broke it.

You know what? The company will probably never make billet flywheels for the public...I seriously doubt they will be selling them to the public. EVER. Meaning if they had them all this time they would sell them. But.. If they did, it would eat into their huge $500 dollar labor charge for tuning one of their motors they offer up for sale. So don't look for them putting their flywheels on the menu! Thanks for the info. I wanted to tune up my new 79 Preditor and your video came in handy. But since the thing will fly apart once it gets the extra rpm...OMG> why bother!

DO NOT GRIND THE FLYWHEEL KEY. That thing is barely holding on to that flywheel. 100% that key is in the trash by now.

Wow you should know better than that. NEVER run a stock flywheel after mods, especially with heavier valve springs. You're lucky it didn't end up in your face. You should be more careful with what you tell others to do. Someone could get hurt.

I would NEVER RECOMMEND sanding down your head. It doesn’t matter if your engine is upgraded, you have more risk of Valve Float at the RPMS you are wanting. DO NOT DO THIS you’ll wonder why your engine failed and blew up because of something so stupid.

No boost. You are dead to me.

How bout you stop playing around with an unmounted motor? Then you act surprised when crap blows up! It looks hella ghetto now.😒

My governor blew apart, parts got wedged in the compression release on the cam.

You definitely don't want to rev an engine unloaded that's what breaks the connecting rods and destroys the flywheels