I watched this video before buying my 49cc 4 stroke kit and 2 yrs later I’m still enjoying the bike with no issues. Well I did have to replace the stock carb because I left it outside in the winter months

Thanks so much. Videos have been very helpful, which make me wonder all of the possibilities that are possible! You’re the man!

Great informative video and demonstration. I was wondering which way was the closed position (Air blocked) and the open position (Inlet, air flows in) of the carburetor choke. Thank you for making and uploading this informative video.

I bought one of the blue wal mart bikes for that kit. Perfect fit. No chain tensioner. Upsized the main jet one level. Smooth 30 mph. Starts first or second pull every time.

That's what I thought those two hoses were for, but I wanted to be 100% sure, so it was nice to confirm what I believed to be true. I purchased a kit, but the engine kit was about 2 inches too tall to fit into my bike frame, so I ordered a different bike that will come within a week or so and it will be my first attempt of installing a gas-powered bike kit. The instruction "sheet" tells you what steps to take, but doesn't really tell you how to do them, plus the photos included didn't really help very much at all. However I was able to figure out everything on my own but wasn't 100% sure about those two tubes or hoses, and I was going to leave them hang down, and I had figured out that the bottom was where the fuel feed-line went. Once I get the engine kit installed on the bike, I'm going to need to figure how to let the longer tube on the Left hang down without hitting the chain, or get caught around the chain sprocket shaft or the sprocket itself.

So glad I found this video. Last video that I saw that was explaining the 142f 49cc motor completely got this all wrong I'm so glad HUGHES motorized did this lol I trust him more.

Very helpful video Thanks

Right 👍 on ordering my 49 soon

Super stoked super informative since I’m going four stroke !

I’ve had to use duct tape to hold the cable for the throttle in place. Helps keep the throttle responsive to lowering the rpm’s.

Man, a huge thanks for the video!

Very helpful tips thank you sir

Hey Mr Hughs, what is the thick black hose going to the air cleaner from the block? I’m assuming it’s to recirculate the gases coming from the crankcase? Does it really need to go to the air cleaner or can I just let it breathe in the open? I’m wanting to build a different air cleaner for my bike.

Also brother u didn't mention what that black pipe is doing from filter to engine block

On the exact same engine kit I bought, it ran fine, but the top speed of the engine moved the bicycle slower than I could pedal it without the engine. It may work on a small air compressor which I have with an electric motor. Was still a waste of time to put it all together on a bicycle.

I have been buying entire kits just because of inability to find the correct clutch, belt or problems with the transmission. Do you know where I can find the right replacement belt drive transmission setup or parts.

Hey Mr Hughs, what is the thick black hose going to the air cleaner? I’m assuming it is to burn off gases from the crankcase? Does it need to go to the air cleaner or can I let it breathe out in the open? I’m wanting to build a different air cleaner for my bike. Thanks!!!

Me again Mr Hughs…… Is there a fuel/air mixture screw underneath the brass plug on the carb? Been riding my bike for a month or so, and she’s down on power. Sometimes stalls at idle, and when I re-start it, it idles high for a few seconds. Changed my fuel filter, cleaned the carb and jet. It’s kind of weird…. Thanks!

What is the exact belt size? I need to buy a replacement and my broken one was thrown out.

Where is the little angle stop that the throttle hits wide open it appears to be missing did you take that off so it hop it up?

Can We Have Aftermarket Air Filter?

Full synthetic shouldn't be an issue for these engines should it ?

Broke the fuel mixture screw :-/ where can I find another one of those tiny screws?

Welp, I’m ready to ride my four stroke. Idle speed too high currently

I need to swap my carburetor, do you think that upgrading to a Dell'Orto PHBG carburetor would be a fine idea? I can't acquire a stock carburetor cheaply, and the Dell'Orto is fully tuneable, it would be a considerable upgrade

Is a piece of crap carb, I can't get my engine to run without being on choke. I've adjusted the fuel needle and the throttle every wich way and it won't stay running. I bought a 2 stroke carb and it ran too rich, just like the original carb having to be stuck on choke. I'm about to give up and take a sledge hammer to my whole damn bike.

My motor only makes power with the choke on. Any fixes or ideas as to why this is happening?

I took all the metal shrouds off the cylinder for better cooling