Fun factz I just installed this engine in a new drift trike build for kids!! Check out the new build on it I just uploaded :)

I always found the "Black Widow" reeds the best for a high-performance build and for the head, you should use a performance head where you can adjust your "squish" settings (the amount of space at TDC as you can change your compression) and get that maximum performance, 2 shoe clutch with adjustable springs, various gearing and the possibilities are endless. The top end speed I managed to get out of my 49cc lucky 7 was 74mph

The piston will expand slightly once the engine is warmed up. That's why it's 43.9mm and not 44mm. If it's 44mm when cold then the clearance between the piston and the cylinder will be too small/tight once warmed up which could cease the motor

When installing your rings always one Groove at a time, less chance of breaking a ring

This video helped me with my install. Thank you!

I love those little carb kits

This is usually how I put my rings on my Pistons but they have a special tool designed for this

You can make a small engine dyno. An inertia dyno would probably be easiest and reasonably accurate for your purpose. I would make it where you could add and remove weights to allow to test on different engines and get several seconds of run time so it doesnt rev to quick but doesnt bog the engine. I believe there is a guy on KZfaq that made one his channel was twostrokestuffing I believe. If you need any more help I can try my best to help

If you look around, you can find kits that are similar to this one, but they have 2-3 boost ports with the main transfers separated, which makes 4 transfers instead of 2 (6 or 7 transfer ports in total counting boost ports).

don't worry about the baring my dad works on all kinds of stuff like that and he had the same problem but he tried it and it worked and we still use it today and we put the ket in one year ago so it will be fine

FYI put the piston in the cylinder just past the rings leaving enough room for the rod before you attach. Much easier.

Performance Piston Rings actually mostly are thinner for lower friction -> thus more power

Also those carbys need a different fuel tank, but when u have them all tuned up they run way better then stock just takes a little to get the bike started

Yayyy you got the parts i suggested😋

Nice beginnings to a potentially killer engine

in our country if you buy order big bore kit, it will came with new performance crankshaft and you will not have these type of problems (and engine will rev even more because the crankshaft will handle it, i think about 2000rpm more, i didnt test it yet..) use 2stroke oil, that is good advice (you can read why up in these coments) I think you didnt use the cylinder gasket (between cylinder and crankcase) so check it because without this gasket your engine will not start up... the window in piston is for the third transfer port in your new cylinder ;) (you will get more mixture into your cylinder) and no that window is not weight reduction :D :D because some people will think it... carbon reed valves - awsome thing, I love this thing, you will have large increase in accerelation rocket key - it is very good thing, you will increase accrelation, power in HP and top speed little bit, but something is still mising there... your flywheel is heavy, so I recommend you to buy performance flywheel instead, it is lightweight and you must not use rocket key because timing is changed in factory (if you cant find it, just type in google "tuningovy zotrvačnik minibike" and you will find some photos of that) carburetor - the stock one is carb with float, performance carb that you used (that on the photo) is also float type, but it have 15mm bore what is much better compare to stock 12mm, but it is china style and lot of people have trouble with them... the last one witch you are preparing for your engine is 15mm too but it is another typ, it is membrane carb, this type of carbs you can find in chainsaw, weedeater and stuff like that, it is much better because this carbs dont have issues with mixture even if they are upside down... but please study how they works and how to mount them before you start... I personaly dont test them yet so I cant tell you about performance but if you set good mixture (with set screw on carb) it will be fine and I think you will have better performance than from the stock one :D just pay attention on mixture otherwise you can kill the engine ... exhaust - I didnt see any exhaust in the videos, why ? without exhaust you will loose all performance... and you can even kill the engine if you run it long and in high RPM... and again you will lose lot of your performance, engine will not be able to rev more than 8KRPM i thing... in 2 strokes all performance is depending on your exhaust... the stock exhaust will perform better than nothing, yes with or without exhaust this engine will be very loud, but with the exhaust you will have power too ... dyno - only way that I know right now is (also it is cheap and you can do it easily): use big eletric motor as generator, than start pluging some bulbs (high power) and plug them one by one until they start going out, just little bit, and use multimeters to mesure current and voltge, by multipling it you will get power in W (you will need at least halogen lamps because stock pocketbike have around 2kW that is 2000W) if you want know the horsepower you just simply multiply performance in kW by 1,3 and you will get your horsepower... but remeber it is not exactly perfect mesuring so you will lose about 10-30% by conversion to electricity, multimiters are not allways perfect (so readings may be different) power loos in cables and stuff like that, but it should work just fine for small tests and maybe you will use it as generator in blackout so maybe it will worth it :D :D :D

Looks like a cool small boxer engine it's clay and even at the sides

Life hack for putting on a cylinder put a piece of wood behind the piston

Does the big bore kit really make a difference in power or top speed?

For the stock bearing and the movement left and right in the piston skirt it won't matter. The connecting rod only moves up and down in a piston. Never left to right. If it does then that means the piston is to small for the cylinder. Hope that settles your nerves a bit

Thank you, I like your videos mate. Is there any reason I shouldn't use spacers to raise my 49cc motor in the frame of a Chinese pocket Bike to give the chain clearance on the (non Swinging) swing arm? At the moment the wheel sprocket, pinion, wheels & chain are perfectly aligned so I don't want to go messing with wheel spacers to gain clearance that way. But if I was to space the motor 5mm upward I could still keep everything aligned as it is now. It would be simple to adjust the top motor bracket & exhaust bracket to fit the lift and the tank would still clear the expansion chamber. Couldn't find any info on Google anywhere so some constructive views on the subject would be good. Thanks

If you are going to make a engine run stand it will be fine if u want to be on the safe side take the clutch out , with that carby the fuel tank u need has a 2 lines coming from the tank

Make sure u run high octane fuel with that rocket key aswell

What is the best pipe you've used for these engines? Did the rocket key make much difference or best leave it as standard ?

I know this video is old but for future reference you take the chance of warping your crankshaft with no load on brake in

question i just got a 49cc 2stroke pocket bike but having issues on finding out what new engine i could buy for it and whats a good site?

I didn't see you install a base gasket. Maybe I missed that part of the video... Also the first carb wasn't a high performance piece. If it has a rotating drum with a hole in it, then don't bother with it. A 15mm Walbro pumper carb (or cheaper clone) would be my suggestion. Defiantly make sure the crank is a full circle type and install a V-block reed valve. I wouldn't worry about the wrist pin bearing. The same thing happened with my big bore kit on my X-1. Do not install an electric starter. Also get the right NGK plug. I hoped this helped some,

If you put the clips in the piston use a cloth and put it in ur engine because the clip can fly away and end up in your engine.... And for installing the piston in the cilinder its much easyer to put the piston in the cilinder before you put the piston on the crankshaft.

Of course you can don’t forget about the extension reed valve block with the 4 window reed and a 17,5 carburetor and that’s it

The motor won’t blow up on the stand but u should attach a chain to a sprocket just to get it used to haveing pressure while running

I would have used the kit gaskets because they might have a different thickness which can change compression

Why didn't you use oil earlier when you put the rings on the piston etc?

When you got the motor ready to put on , how did you mount it ? I'm using a 4 stroke motor mount on mine and it needs to go to the right about 3 ' . Did you have the same problem ?

How does this performed? I made a RC car with that engine and would like to improve it!

Good work nice video 👌

I wanna hear that engine roaring with new performance carburetor

Have you used drivven? Compact I/o modules that give the mini diagnostics on par with anything out here. I have an array of sensors and mad knowledge don’t know if you ever got an answer ?

Piston rings will not stretch out as you say .I've installed piston rings in an all kinds of engines for many years including ones like this and you can stretch them out enough to get them to go along they make a tool for it yes sometimes they break either way..

did it crank? where is video of THIS engine running after the BB install?

Dylan what brand do you suggest for a 50cc 2 stroke engine for an old calgari pocket rocket? I’m currently restoring one thanks dude!

These kits should come with preinstalled rings on piston

The carb plus starter are from a dr50 engine a totally different kettle of fish... and yes the engine will be okay on its own with no load I have a mini moto with no chain for about 6 months now cos I can’t get the right one and it has no load and it will be perfectly fine

I miss this channel 😢

Dylon, May I know what kind of spark plug for that big bore engine?

1:09 *EGINE*

hi i just ordered some bigbore kit on amazon, it came with the entire top end and a supposely more higher perfromance carb than what allready on the syx moto i got, hey i was womdering do you think i can uae the same crank shaft or should i upgrade it since im using a bigger bore, i seen other kits come with a crankshaft but my kit didn't come with one. Do you think it will be ok? maybe its the same size cranks shaft" or do you think the one that comes with the big bore kit is better?

That’s awesome

have the same carb its great

What''s the difference between the 47cc and 49cc other than two cc's, why do you prefer the 47cc?, ya might want to think about making a dummy axle with a drum type strap-brake for the engine stand, how else would you ever be able to measure the HP/torque?, btw, they actually sell small engine dyno's on eBay, great video, thanks for sharing.

You should use a ring install tool which puts less Stress on the rings when you install them.

This for mini pocket right? i used it before. I have Rod scooter now

Did the jet pro exhaust have a spring setup?

I personally would have used a couple of washers to stabilise the budget pin bearing

You are a big inspiration to me I just want you to know that

@dylon desbiens Can you let me know it you need a license for a super pocket bike or not? Thank you

Old vid but thy still make thsse engines i bought one when theybwere like 65$ cuz i love 2 stroke projects. Lost the carb never did anythibg with it. Now i see they still sell for almost 200$ now was thinking of buying another for a new project so i have extra parts too, so i csn try a port and polish of the heads an d other stuff. Cant many vids about the oerformance, i was sold on the "high compression head" clsimed to go to 11k rpm but always doubted tht claim. Would love to see and know the pweformance

Probably do the expansion chamber next and try putting a smaller stinger on it

Side to side movement not so much a concern but up and down that would be fun fact your fingers can feel up to a thousands of an inch

Idk anything about engines. I looked on Amazon. There was a variety of kits. Which big bore kit should be used for a 49cc gy6 moped engine?

Don’t you need to replace the crankshaft for counterweight? It is heavier now right?

Would this fit on one of the pedal bike engine blocks? Are they universal?

You can put the bottom piston ring on the top first then put it in the bottom.

What do you lube the piston and cylinder with? 2 stroke oil or what 😂😅

hi i have just done the same to my engine i want to see the video with you fitting the electric start what you are doing i am doing the same i am very interested in your videos thank you for every thing well done

When it’s brand new still not broke in yea I would say it’s bad but break it in an try it then an a Dino set up idk I been looking my self

For a small engine I don't think it will but still an engine is an engine it goes down to the quality of it

To everybody that want's to do this: If your Engine doesn't turn over on the First start try to remove the Sparkplug and turn it over Fast a couple of times, it could be that you just put to much oil into the Cylinder.

U need put thin washers case harden pick them at lawn mower places or mower cycles should have those type of washers on both side keeps bearing moving make sure it design for piston this will make ur engine last longer

What kit is this? And if you may, where did you get it from?

Hey man can you send me a link for that pull starter and a part number or link to the proper coil? Just got a SSR 47cc for my son real cheap but needs new coil and pull start

Great 👏🏽👏🏽👏🏽

nice 😊

Hi I've got a 4 wheel electric scooter electric scooter I would like to know if I could fit that sort of end I could fit that sort of engine in it as it doesn't go that fast

Hi, i also plan to buy a Big bore kit for minibike Blata bud i do not know if it really increases performance could you please advise me thanks.

hi you are supose to have load on two stroke motors to run in mode for about 2 hrs

My 4 stroke 100cc has 54mm bore, I want to put it on my bike that I made from scratch and it has a lot of gears(it is on my channel)...do you think I can reach 90mph at least

Can u tell me where I can buy same exhaust like yours pal

Hopefully the cylinder holds in place

wihh mantep motornya salam dari indonesia

will i have to upgrade carb if i have an electric one?

Where did you get that exhaust from? I’m trying to find one for my little 49cc dirt bike but could only find a stock one

after you give the breakin, give full throttle if you don't hear a grinchi sound is good, if you hear any rare sound use another copper gasket on the dome(sound at top speed full throttle)

Why does the clutch look like that normally they have that like covering thing?

How many cc's are added with the big bore kit

can you put a tramission box wit this set up?

Can this type of engine be mount on a 49cc chinese standup scooter by chance?

I saw you get the rod to in the kit

Just make sure you heat cycle it a few times for the break in

Can you use grease

Where did you get the exhaust?

Did you have more issues with gaskets and piston head hitting? Wondering if the kits worth it

Do you have a link for the pipe? I cannot find it anywhere

Friend what your crankshaft oil seal size is it 7 15 25

But where did u get the big bore kit

Can i use a 415 or 420 chain? thanks in advance.

now you need an x1 pocket bike frame to put it on or cateye frame and make it run off of race fuel

Ente mantap jiwa bang

i know a std 49cc is about 3 HP....what extra HP is gained plz

How long did it last? 😂

Does this bring up the cc of the engine??