The rocket key is one of the best upgrades you can do.I take those engines apart all the time and rebuild them.I put them on razor drifters and they make fun go karts.

Nicw tutorial! It's cool to see this being suped up before adding gas to it. Maxxed performance from out the gate! I can't wait for that $10 pocketbike video. 😎

Glad u took my arvice from a while ago lol

Rope/thick-string jammed down the plug hole to lock the engine

I really hope you make some video's on that engine running, a engine run-stand would do the trick, I'm going to build a trike with two of those 49cc 2-stroke engines on it, and a electric hub front wheel for a reverse, lol, awesome video and info, thanks for sharing.

Love what your do bro keep up the great videos, thankyou for the paper trick between the flywheel and coil I will use that one!!!!!!!!!!

you can also use rope or rubber tube to stop the piston instead of the screw driver and then there's no worries of denting the piston

Give this video a LIKE for me!! Some of you are saying retarding it like I did could damage my engine and won't be positive. Never heard this? Whats everyone think?

Please do a vid on the v8. That would be super cool. Also i really like these build vids. Good job

Good job 👍

Great videos Im doing a similar build myself had a 49cc engine that was shot and it was just cheaper to buy a new one than order the parts needed. Did you ever install the electric start? Thats the one thing the new motor didn't come with, may swap over the old unit.

Good video bro! Subscribed!

Next time you better use a piston stop. You dont want a screwdriver in your engine lol. Keep on going bro nice vid

Awesome

awesome. can you try and find a minimoto dirtbike. tis project would be perfect for one. my super dirt does 67 km

Just started watching your video series who's a good supplier for these 47cc engine mods? Ebay, amazon, online store? Thanks

Any videos on how you installed the throttle cable

Nice

I too hav an exahust system. Its a tecnigas exhaust system but i will have to chop and re weld and replace the manifold with a mini moto 1. Also do we need to do any thing with a clutch variator or do theese engins not have 1. Also im intressted on gettin the rocket key. Also could you not take all the fins off the fly wheel 2 lighting it right up sure it will add to the performance. Also you ever thort about a transmission box on.

I have a 49 weedwacker motor on my bike could i swap it out with an enging like yours on here

Use nylon rope in the cylinder is much safer and won’t cause no damage!

Wait how is to the left for top end?? You need quicker ignition for top end, so it has to go to the right

Please no one ever put a screwdriver in your bore 🤦🏽‍♂️

Man those v8 motors are beutiful!! Hopefully this thing will rip! Are you gunna get the top end ported? That will just be the icing on the cake. If I were you I'd use a pumper style carburetor like the Wj 71 (people use that on 50-71cc engines) to get the most power and you won't have float bowl slosh. Also that crank looks nice especially for 17 bucks!

awesome bro..... do you have a bike to stick it in

I did it to mine and put the stock one back

You cool bro I like your videos

Dyaln desbiens get a m4 gp shorty exaust for the 10 dollar pocket bike build

Can you recommend me a good cheap pocket bike for me I’m looking for a good beginner bike

Where does that one black wire by the s spark plug wire hook up to?

Instead of sticking that screw driver in here just use an impact gun it takes it right off with out haveing to stick anything anywhere I do it on dirt bike motors all the time

What the size of the woodroof key?

1:15 dont use a screw driver. Just use a rattle gun and itll come off straight away. No need to risk your piston

Hi guys I just bought my son 1 of these 49cc dirt bikes it's only been ridden twice bought from new and for some reason the rear wheel has locked up . Bike will start if it's up on a stand but the rear wheel spins, engine guts off when wheel stops spinning. Any ideas on what it could be. Waiting for the shop to get back to me

is this possible to do for dirtbike/moped? if it is, how?

What are you putting that engine in??

What are those v8's for

I think the rocketkey is a scam since by just with that you might break the engine and 2 strokes dont really work well with more advanced timing. Though it is unique on every engine and i suggest that you get one of those adjustable ignition so you can set the timing just right

That crank is made for a 44mm piston with a 12mm pin, yours a 10mm pin, just order a new piston, not expensive

Me kit 70 Evo 1

Why do you call it a 47 49 cc it’s only a 47

I hear with the head the key way don’t like it ..

Do you even know that that engine runs

I hate to tell you this but that full circle crank is bad news now you're poor crank bearings are going to starve because the two stroke mix can't get in there to lubricate them because the full circle Crank is blocking that from happening.. . it's best to do CAM2s turbo crank mod on a stock crank You need a piston with a 12mm wrist pin for that crank to work by the way in case you haven't noticed you have to put a lot of thought into these engines to make them work right and a lot of modifications fitting and grinding all you're doing is buying junk parts from China and bolting them together your engines not going to be very good I'm sorry to tell you that... that lightened flywheel you have is bad it's better that use a stock flywheel and mod it like how Skullcam did... now you're going to have the rotating Mass of that full-circle crank and that heavy to two shoe steal clutch and that lightened flywheel isn't enough to counterbalance it... bling bling lol

buy a kit from china upgrade everything at once

The rocket key is one of the best upgrades you can do.I take those engines apart all the time and rebuild them.I put them on razor drifters and they make fun go karts.