Thank you.

Hey man that link in the description isn’t any good anymore

what is the song at the start? i like how it sounds!

And cutting piston skirt makes the engine loose low end rpm power. Thats what he didnt tell you.

Sorry about my typos. You get the gist though right?

Adjustable timing plate & retard the timing and she'll SCREAM!

20% more fuel with the same jetting. A givin carb jet is gonna deliver the same amount of fuel on the same engine even with a different head. A larger combustion chamber isn't going to let it suck 20% more fuel in, the slant head just won't squeeze it as hard bro. Low comprehension engines like 80's/90's 5.0's are 9.1:1 & will take a ton of ignition timing compared to a high compression 289 hips but the 289 made 271hp & the 5.0 made 225hp. Apples to Oranges?

So the intake (downward) stroke will still pull the same amount of fuel. You are losing combustion chamber volume but it will still pull in the same amount...get me so far? As the piston goes top dead center its gonna SQUEEZE that intake charge more hence "higher compression". To alleviate detonation/ping...what has always been done it to reduce ignition timing. Polishing the combustion chamber like chrome helps a little also by reducing hot spots in that squish area. Furthermore that Puch/pool head obviously has more cooling just by the amount,size of fins and also its air flow down caricature of said fins. A great way to sell your parts is to try and show fault with others products. PUCH has been around the 2 stroke business since probably late 60 but definitely the 70's. Not to be a grump but stick with what you really know. Thank you for turning me onto that PUCH head. With a lil love on that squish band (just polishing) it's a great alternative to alot of high priced cnc poopoo

Pronounced "POOK".

Can i put one of this on a flip folp hub be for i buy one 1.25 hub will it work

I'd like to see some work done,,,

Hey dude do you guys pronounce chamfer like Camphor (cam-for) like the wood as here we say (sham-fer) chamfer Tomatoes tomatos

I must have a modified nt carb, because my fuel line connector sticks out the side at a right angle and doesn't leak. Guess I got lucky!

Can you spare an old cylinder and 49cc piston to an old man in West Virginia please Thank you?

More compression equals more power more generally across the range. And adjust your timing and increase your fuel octane.

The head gasket on a pouch motor is 5 times thicker than on a motorized bike, ouch did that to lower the compression

the wee thing you were on about was a"wood ruff key", i would like to get an 11-tooth for the front but you`d maybe need to modify the casing at the top. it would be easier to change than the back one.?

What you are saying is somewhat correct. But also not. It's true that having less volume of cylinder head space will reduce the amount of air and fuel that can be drawn into the chamber. BUT the opposing result of having the combined volume of total that can be drawn into the Chamber and then compressed into a smaller area is whats important here. By using the smaller volume head you are increasing your compression ratio. And there for power output should climb almost always. As long as you are using the correct ignition timing and fuel for it. Usually with higher compression you will need to retard the ignition to prevent pre detonation. So basically I am saying you are correct. Except you are worrying about a minute detail that in the bigger picture matters little.

I leave my choke open all the time and have zero problems

Omg this guy is clueless

Great video man im having some problems with my head Leaking I have a brand new 80CC motor that ran fine at first. Ran through a 1/2 a tank.. Tighten the head And I haven't got up to start since So I took the head off and there was a lot of oil in between Is the head in the gasket I cleaned everything up Put the headback on and noticed that there's light coming through it I'm hoping I didn't warp my head just can't figure out what's going on And I don't want to Is overtite in my head Is android my engine Is any help would be much appreciated

time to make a new video

Bro, you need to readjust the engine so the carb float is level. It needs to go down and tiltedup, front up some, and same for back. It ill run much better, trust me I have built over 42 bikes.

👍👍

Nothing beats braising the screws at the tank

Mine weighs total piston, pin and needle bearing.88g stock wow china lol

What is the stock compression before sanding the head

Cool advice do you remove the rubber from both sides of the bearings or just the side facing the inside of the engine

I wonder if raising the exhaust port could damage the cylinder at high revs per minute, as it gets so close to the limit.. I suppose you must not file so close to the limit.. Am I right, and does porting force the engine to use more gasoline??

Just so you know and I hope you learn this by now liquid always levels itself out so I don't know what you're using that little tool to level the liquid out for

Holy crap this video is from 9 years ago and I didn't discover these motors till about a year and a half ago. It's crazy how unpopular motorized bikes are. You would think they'd be world wide popular by now but they ain't.

What about head gasket maker??

I am having a hard time finding the correct replacement jets for the same carb..,what are the dimensions please ? Thanks

There is a small ridge there I believe it's a seal remove that won't it cause a leak? How about if grind off a millimeter would that work?

HAHAHAHAHA he said add 5 gaskets!!!!!! Hahahahahaha what an idiot

TAKE THIS VIDEO OFF OF KZbin!!!! You sir are an IDIOT!!!!! let me explain something to you”kid”. IF you get a black cat firecracker, open your palm of your hand and place the firecracker in your palm of your hand (keep the palm of your hand open and do not close it) then light the firecracker……the firecracker will explode. But try this…..put the firecracker in the palm of your hand and close your hand TIGHTLY with the wick only hanging out….now light it. Your hand WILL be forced open soooooooooooo much harder. That is called COMPRESSION. Kid your probably stupid enough to actually try this, you will get hurt, this is only AN EXAMPLE. Your thinking is not logical. You are giving out false information to people who dont have my knowledge or a true mechanic that whos what compression/force/and explosion is in a nutshell. There isuch more to this then i care to explain. You need to take this video down and off youtube. And tell yourself over and over that you are an idiot for even trying to explain something you have NO TRUE KNOWLEDGE ABOUT.

These engines surprisingly tend to not pre-detonate. I messed with a few heads and ended up shaving the head until the piston kissed the head and wouldn't run. I added a slightly thicker head gasket and the squish was 0.04" and it ran really well. One night during a one mile wide-open run, I looked down and the spark plug was glowing! I bought a colder plug the next day. Oh- I wanted to add that if you bump up the compression a bunch, you can raise the exhaust port ceiling and not lose any low end power while gaining power on the mid and top end.

Bro you're so hard to listen to do you talk much? Terminology is screwed up too choppy you should have practiced

I find that porting and polishing does increase overall performance based of of my own personal experience and the videos I’ve seen on KZbin. Another benefit to these motors would be to ensure that the cylinders have been honed for a more advanced oil saturation on the metal surface to increase overall lubrication since you’re increasing the surface area by using a honing device.

I have a racing engine with performance exhaust and head and I went with the 40 tooth sprocket and I can go anywhere. hills don't slow me down at all and for everyone who rides bikes with engines buy a chain breaker they really come in handy!

That's not plated that's polished bruh. If you polish aluminum it shines like chrome. That's not plated.

Take some heat, heat the engine case up and leave the bearings overnight in the freezer. also dont use skf, it has way too much play, use snh if avaivable but skf would work. Never hammer bearings into your engine and if you have to just start with a big block of wood over your bearing and then take a nut the size of the outer ring and slowly make it your way. Also always get your crankshaft trued and balanced or replace it with a already balanced one. My crank has 1/2mm bending. Also if avaible get brown viton sealrings. I didnt do many bicycle engine kits but i buult 20hp+ moped engines(standard 3.5hp)

Are these bearings the same on all these types of bicycle 2-strokes? (49cc, 66cc etc...)

I sanded down my head gasket instead and it does difference aswell. Oh and by the way it was burnt lol!

Italian made does not mean longer longevity in fact when was the last time you drove a Ferrari?

My bt80 used a 75 jet!

Just use an external battery pack and a long ass cable for tour phone. No need for all of this

I was told stock npt jet is a 70..if that helps anyone..

I have done a reverse jug and placed my intake in the front and my exhaust exiting from the rear..now more air is being drawn into the carb..which has caused my engine to run too lean, so I'm wanting to rejet the carb. to get more fuel in..to compensate for the extra air..I'm currently running 50+ mph but I know that I could get even power out of my engine if my air/fuel ratio was better..my engine will cut out at full throttle and my spark stays white to slightly gray..so I need to richen up the carb..

Wat do you think about milking the reed block mounting surface witch moves reeds closer to crank in turn means less crankcase volume. Aka reed stuffers or when reed stuffers are not available then you mill/shave/plain/deck the reed block mounting face??