The video is inaccurate. There's no clear threshold where a crank suddenly goes from unbalanced to balanced-stock cranks are technically still "balanced." Drilling random holes at a certain depth isn’t the way to achieve proper balance. I’m not here to plug my content, but the calculator I uploaded is what’s actually needed. Do the holes need to be perfect? Not perfect, but close. Drilling too high or low on the web affects the factor. Uneven holes between webs throw it off. Poor factory QC doesn’t justify poor work. For example, there's no minimum balance factor for cranks-I’ve seen them range from 20% to 32%. Going from 20% to 40% requires less mass removal than 20% to 50%. If your reciprocating mass is heavier, the required mass removal changes. Based on the video, I estimate: 1/2" bit at 13mm deep removes ~26g (both sides). 5/8" bit at 8mm deep removes ~16.6g. Total: ~43g removed. But you don’t know your starting point. If your 47mm top end averages 140g and your crank started at 30%, you'd now be around 63%-65%. You can’t justify misleading info by saying, “So-and-so did it, so I trust them,” or claiming “my engine magically gained 5k RPM.” Balancing a crank doesn’t increase HP or RPM-just smooths operation. To do it right, you need to: A) Determine your current balance factor. B) Calculate how much mass to remove (e.g., going from 23% to 50% with a 140g reciprocating mass means removing ~40g: 140g × 0.27 = 37.8g). I believe you mean well, and I respect that. But this kind of misinformation causes confusion. If you ever need help or clarification, I’m more than happy to assist-I love MBs and math.

Great Job 👍 Question ❓ did you make the rear swingarm from scratch? Or is off something else? Also what size & brand is that 2 stroke motorcycle engine? You probably built the world's first 2 stroke, knobby tire, off road, hard tail cruiser motorcycle 😂

Will these work on an avenger 85?

I recently tried to upgrade to the 100cc 4 stroke. I loved it's power to get up hills. I put about 12 miles in a three day period. Only to the store and back. On the third day the clutch jammed up. When I got it home and looked inside the clutch was almost worn out the brass bushing was also worn. I think things were assembled incorrectly having too many spacers in the wrong place. I have the chain drive transmission. I don't want to return it and wait for replacement. I would rather rebuild it myself. The problem is I can't find the replacement parts ie: clutch, brass bushing and the washer spacers. Or if I must; an entire replacement transmission. Do you know where I can buy the parts?

Does the expansion chamber burn leg?

Huge mistake ❌ Huge opportunity ✅

2 stroke 85cc "avenger 85" motorized bike kit would go so hard on this frame, I'm building one on a 1958 Murray beach cruiser hoping for 60mph+

Can’t wait , it’s actually a very clean bike, once polished up that thing would look sickk

Aww dude I know that feeling in your stomach after you do something like that😂💯

You can get a jackshaft plate from BMI karts that will work for your torque converter.

wish you luck, cant wait to see it man. everything happens for a reason

Only in WV lol 🤣

Mine is the fastest in France 😈

WE NEED MORE OF THESE

we need more food videos

this video is fire! i love the food videos! we need more of them!

5:02 Does the yd 100 vibrate heavy? Because i am planning on buying one. Even though you say they can overheat but it is how proper the mixture is

Oops!

I've been trying to build a similar set up. I can't find the CVT you are using. All others I see don't have the sprocket to the rear wheel on the place yours is. I would appreciate if you can help me find where you got yours.

man....love the build. can you tell me if the sprocket mount is a rag joint type, of let me know how you mounted it. i cant a setup i like. wish they made left drive wheel set ups.

💯👍🏾

Cant wait to see it 😊

Breaking in an engine really does have a lot of different views but the biggest factor is if you're the one paying for the engine then it's best to honor what the manufacturer says. That said, I'd treat engines by their value meaning I'd not have as much worry over a motorized bike as like a Harley or expensive car. That said, most the bike engines I've seen(I'm no expert) are basically junk from the manufacturer but that might even be more of a reason to go easy on the break-in unless you're able to tear down & repair an engine. I'm not so I'd treat an engine w/ kid gloves but if I had the tools/ability to tear down the engines I'd ride the piss outta my motorized bike & replace parts. I still have not found an engine for bikes that I trust which means I'll have to find a man like you to help me build a worthy motor. I'd never buy a bike berry motor but I'm still looking at motors/engines for a decent one. peace

Dude this is a masterpiece! 👏

Chain looks too tight when you put your hand on it. It should have 1-2 inches of play.

From a 10-44 (4.4:1) to 8-48 (6:1) should be drastically different. Less max speed but way more low end torque. Assuming you’re using a centrifugal clutch. For example let’s say it’s a bike with 26 inch wheels. A 212cc at 4000rpm at 4.4:1 should get to 70mph on a light weight bike. Keep everything else the same except switch to 6:1 and looking at like 51mph. Assuming you’re using a straight chain set up. I wouldn’t even trust 4.4:1 on a bicycle with a pressure washer/mini bike engine- I’d be worried I’d burn the clutch out because even 19 inch mini bike wheels recommend 6:1.

My bones officially feel small now 😢

Make an AI song about how Taylor Swift always makes songs about crying over her ex boyfriends.

This was awesome brother!

Haha💀🐢🧄that was so funny, tehe☺️ This guy is massive, he should get a low taper fade

Guy i wanna buy a kit but i found one from ali baba 85cc is it worth or no

RDM PIAGGIO?

Am looking to build a bike that can do long distance trips. And preferably would like to just put normal gas into it. Would the avenger 85 work for that? Or is there another engine that would better suit my needs( perhaps the Honda gxh50 ?). Please let me now if this is within the realm of possibility and hopefully point me in the right direction. ( and I know an actual motorcycle would be the answer but for various reasons iam dead set on a bike. )

Actually the 49cc engines are excellent engines when built right. No they arent speed monsters, but I have one that did 26mph out og the box with a 41T sprocket on a 26" wheel. The 49cc engines used to be widely used and they can be ported, balanced and geared right to achieve 30+ mph and super reliable. I have a friend in Georgia that had bike with the Gubee 49cc engines and he's gotyen 1000s of miles out of them. Not being a peckhead here, but I been biilding and tinkering with these engines since 2009 and I know for a fact the 49cc engines can be good little engines, yeah not neatly as powerful as the 66cc engine, but theyre reallly not any junkier in my experience they just seem that way because they dont have good power out of the box typically...

First off I wanted to say you made a good video and I agree with all you said about the engines performing better overall grom simply have a better balance. After getting them balanced all the other mods make more difference and the better balance is gonna give the engine better longevity unless there is just a failure that was gonna happen regardless of the balance. on the "triple 40" engines I drill all the holes with a 1/2" bit. I drill a hole in between the existing holes in the crank 14mm deep rhen I space over 17mm from center of each factory hole and drill another 14mm deep.

this is amazing lol

can you tell me the inside diameter of the cylinder or the outside measure of the piston? THANKS

Impressed with the thoroughness of your presentation! Excellent video.

Ive snapped 4-5 chains, if you have that leg forward its safe from the chain

No minareli hybrids😢

Hi I the same kit are the connection colored the instructions is confusing when come to the wiring

This is the Skar Audio SDR series 15in subwoofer in Skar's ported/vented enclosure. The sub is rated for 600 watts RMS and a peak of 1200, but the current amp is only capable of 500w max with an RMS of 300. It's crazy that this below-$200 subwoofer at less than half capacity shakes the whole house.

I squeezed 37mph out of my first 50 2 stroke but that was just a fluke lol idk how I did it. (Blew up shortly after)

Next episode?....

if you vertically mount the engine, how do you modify oil pick up?

Menace 85 build by big brother can only handle little over 8 hp😢

What is a super pk 80 (pk( is power king never seen a pk that is not 40 mm stroke and low hole piston a 49mm piston is high hole how you get rotation only a 38 mm stroke can work

❤

my avenger 85 is doing 52mph stock but watch the piston ring pin mine came out and messed up the cylinder i lost all compresion i had to do a rebuild and my phantom 85 is doing 58mph stock but i want a menace 85

phantom 85 v3 im doing 58mph stock on 38tooth sproket