There is a lot of tradeoff when it comes to our single gear motorbikes. If you use a larger sprocket, your max speed is limited by port timing and how well the crank is balanced. With a smaller sprocket, you need more engine torque to pull away from a stop but you can achieve greater speeds at lower RPM. To increase torque, you can delete the base gasket (increases compression and gives less exhaust duration/blowdown), use a high compression cylinder head or sand down the top of the cylinder until you have between 130 and 140psi compression, add a reed valve/windowed piston, and stuff the crankcase. To increase top RPM, increase exhaust duration by raising the roof of the exhaust port (don't overdo it!) and installing a larger carb to allow more airflow.

Great video

Nice video. Bike is riding well. 👍

A expansion chamber is a must for low end torque.

I hated the 44 tooth sprocket, I like to cruise fast. Currently I'm rocking a 28 tooth and getting over 40 mph top speeds. Sucks from a dead stop though. I think the 36 tooth will be ideal.

Hey how's it going I see you made a new video and it looks like you got your bike running good motorized bike life 🚲💯👍, and I'll subscribe

When stopping then going at stop signs, you need to use the clutch, pedal a little whilst letting out the clutch slowly with some gas, and she will have way better acceleration for traffic

Good Point on the Lower CC ---Now if ya all wanna boost speed you can go small Nitrous , super easy to install , or use a E Bike Tire BOOSTER ..which connects to the back seat pole takes 60 sec to install ..you can also use a toggle switch to get in the booster ...JZP Yuma AZ

Great vid though!

My BBR is a 66-80cc stage 4 kit and it goes 32 on a 42 tooth sprocket. My BBR runs smoothly on my champion huffy looks good too. I'm wanting looking into high performance to increase horsepower and speed

I run this sprocket on my 66/80 ebay special. Goes up hills and runs at 30 pretty easily

This bike sounds very healthy, I wonder what you've done to make it sound so happy (apart from fixing intake leak with duct tape and clamp)

Should be lubricating your chain atleast once a week anyway they always rust if you dont. Rain humidity moisture keep it with nice oil clean with a rag beforehand if it's dirty with oil.

If you take the air filter cap off and you take the cap off the muffler you will double your hp yes literally double so try it and let me know how fast it goes after that

Is it possible to start without pedalling from a stop on 36T?

hey...I watch a lot of videos to see what I can do to improve my two bikes...I just ordered a 36 tooth sprocket, can't wait till it gets here. Did you run your bike on that speed test with that sloppy loose chain? Man, that's dangerous. if that chain ever came off at speed because it wasn't tensioned properly, you could very easily go right over the handle bars when it does come off...slide that whole tensioner back towards the rear sprocket. I'd hate to see you get hurt havin' fun man...PEACE

How fast do you think your 44 can go? I’m debating about buying one

Try a38or40 tooth you will get same speed and faster and more power going up hills

is the lever on the left a clutch lever?

You should look into porting your motor you can get 45mph with that sprocket

Where did u get the motor that style is rare

how many cc's does that engine have?

U don't need to take links out the reason ur chain loosened is most likely do to the chain tensioner vibration loose just move it back towards the wheel and it'll tighten

38cc won't pull at all with that sprocket,, 49cc will handle it but peddling required for sure, and the slightest hill will annoy you, 66cc or bigger is suited for those sprockets. As to your chain, a bike chain is not under the torque or stress as the drive chain for the motor, decent budget chain lube will keep your chain moving freely and won't prematurely wear out the rookies or open up links. Upgrade to a stainless 415 chain 110 link, PJ One chain lube once a week and your good to go 👍. Oh yeah, I don't slip my clutches, I peddle and just let it out quick and gas it, usually 3-4 pedal rotations is plenty for my bikes to pull me

Move the chain Tension more back

You be /#5%$% then if you had an emergency stop! Get your brakes updated. SAFETY IS TOP PRIORITY, unless you wanna be paying outrageous medical bills. B Safe out there.

Not fun to have the chain fly off on one of these. the chain gets stuck between the rear sprocket, and spokes. It locks the rear wheel up, and need tools to get it loose.

I'm hitting 38mph on mine and it's got the 44 tooth

Im getting 37mph on a 39 tooth

When i switched the sprocket i gained like 2mph not impressed

32.6 ly/h 😄 🇪🇸

mine has chainsaw plug and goes alot faster