How fast does it go

@@ezrabroomer565 I've hit 42mph but the rpms were only at 6K but I know it doesn't sound like much but on a bicycle you're flying lol and you gotta remember a car can stop on a dime at that speed but a bike can't. Honestly I'm going to put my 36 tooth back on. It should take my top speed down about 5-7 mph because for one I don't wear any safety shit and I'm a gear head so I'll always go as fast as it will go and I even wrecked once going about 5 mph and I actually got banged up pretty good

I can manage 40mph with a 44 tooth sprocket not a stock motor but still

@@you_dont_know_me6583 that was about a year ago and I've upgraded since then. My main bike has the phantom 85 V3 and my spare has the yd100

What kind of frame and Wheels do you use? I need a get a sturdy setup done that could handle those conditions

What size tire

hmm in my experience these oil ratios bog down my motor (*and fowls the plug with oil sputtering out the exhaust), and so I run at 32:1 with no engine problems after 3,500 miles

Correct . However motor compression makes a difference.

should be.

It won't have much low end performance but will have good top end the stock 44t you can get to 32 to 34 mph and every tooth less is roughly 1 mph faster but it may take a long distance to get to top end with a 14t it may help to have higher compression and a turned exhaust to have pull or acceleration.. me I like the 40 or 44t sprocket to get to cruising speed fast say 28 30 mph because of stop and go for city travel with a 14t by the time you get up to speed you'll have to stop and start the long process all over again unless you're on country back roads

Higher the compression more low end torque I have mine at 165 psi some of the stock engines may have up to 120psi but most are around 90 psi or just in-between

Had a blowout on a ride just a few nights ago…. Sucked

Yup, it’s the offset intake. Which worked to my advantage on this project. I also ramped up the idle so the motor would rev. I’ve since switched it back to the cnc intake to tame it down.

@@tonytaylor5087 get a longer intake widen the ports 1-3mm no more than 68% bore width or for racing 70%. Raise exhaust about 1-2mm ya can go as high as 4mm no more but on the degree wheel go to 160/165. For exhaust 115-130 transfer 120 good # 125 for 165/170 is ok or 160/110 ex/trans for torque 160/120 for a little both worlds but 180 is as high as y need to go on exhaust 130 on transfers intake well all the way is fine w reeds

Of course it has an air leak it's made out of chineseium these things are garbage but that's kind of what makes them fun

Front sprocket?

@@chickenlittle5916 20 tooth>100 tooth, 10 tooth>32 tooth is my total reduction. 26 inch wheel. My engine is the 142F topping out at 8500 rpm.

Air leak in motor, and the carb tuning looks like crap. Engine sounds all sorts of wrong.

i think my personal longest trip on a 2 cycle system was about 150 miles in a day. 3,500 ish miles later and she still mostly purrs

I bet that’s perfect 👌

12 degrees is almost twice what I experienced here!

Můžeš si koupit větší motor. Nikdo tě osočovat nebude. Lidi z mého okoli mají 78 5 ccm a policii je to jedno

@@tonytaylor5087 update: I got 58 tooth instead of 56, it was out of stock. So i am able to ride those hill with little help of myself, just little pedaling. Also i have looked at map and ita actually 10 degree not 12. What motor are you using? Mine is 50cc sunway 2 stroke 1kW. its also new motor, 16:1 gas oil ratio

@@Matthew-wj8cm máš pravdu že je to policii jedno, dokonce jsem jednou zastavil a ptal se jich a oni mi řekli, že ani nevědí, že něco takového existuje. Spíš se bojím pojišťovny, kdyby něco...

@@nasledovniknikolytesly4351 chápu. No vtipné že jsme se setkali na BikeBerry videu. Tihle týpci mají hodně hejtu mezi lidma co těmhle motorům rozumí a zákaznický servis taky nic moc. Takovej F-Zero rám bych chtěl ale dostat to do našich končin? Ten F-ZERO od Minibike-Shop mám doma ale není to ten pravej.

8 tooth?! Please explain 😃

Only if your chain is wore out

@@zimmhollowfarm8414 should you oil the chain?

Hey Melvin, no offense intended here but please use some punctuation. It's difficult to figure out what you are saying without any commas or periods. It all runs together and becomes a chore to decipher. Thanks man, good luck with your ride!

Uh...what?

Btw it goes up hills no problem

It is geared pretty low but I wanna be able to go up hills so that's y

The 44 tooth is where brake modification begins. I just took it off for the test but if I was going to stick with a bigger sprocket then I’d enlarge the brake disc and extend the caliper.

Thanks that really helped out. To modify the disc brake for a 56 tooth sprocket , would you buy a bigger size rotor (what size) or would you modify the existing one? Also for the caliper mount, how would you make that bigger? I’m trying to figure it out because I want to get a sprocket as big as I can with a disc brake still working as the brake system

You can't get anything bigger than a 36 tooth sprocket with a 203mm rotor.

Tensioners are often more of s hindrance than anything else. Even with the original sprocket its better to just shorten the chain than to add a tensioner.

Haven’t done a maximum speed test yet. Once the engine is dialed in more I’ll do it.

For real, Im able to go up decent size hills at a low speed no problem on mine. Cap removed with a tapered end piece is all I've done.

Absolutely!

you did even need to hold it Wide open ,... i just Want to know , what the gear Ration is ,, WIth Rpms , at Speed .. but i guess your not a car Engineer on Auto / manual Trans

It was a ton of work! So many hours in this just to make it reliable and accurate 😃

@@tonytaylor5087 it may have been a lot of work but all your efforts show a far more accurate picture of gearing sprockets correctly. Many will appreciate this descriptive information when choosing sprockets. Much gratitude to you as the hill I have to traverse is an average of 14 degrees and over an eighth of a mile. Hard on brakes goin down. Performance engine heavily ported 21mm carb expansion chamber lightweight aluminum with steel swing arm soft street suspension . Even so the hill is at a barely legal grade limit (one short section exceeds the 17degree limit at the very top making it a challenge with my 42 t. Halfway is as far as I’ve got. I’m thinking about that 58 dollar nitrous kit for this one hill. The rest of my travels are small slopes mostly flat so I don’t wanna go to a lower gearing( larger sprocket) If I could attack the hill at a speed nearing the powerband 6800 rpms attempting to accelerate but nowhere to build up speed over 10mph at bottom. Jack shafts rob power and good ones are heavy. I’m thinking about a two sprocket using a modified upside down front derailleur as my motocross chain tensioner will easily take up the slack but I gotta get up this damn hill at least twice a week. Stranded time an again. Pushing it up or leaving the bike roadside not an option so I just wanna sleep in my own bed as opposed to roadside or waiting on a truck or disassembling my bike into 3 parts to carry in a car. WTF am I gonna do? 50mph now w38t now 42t.

Thanks for the kind words. Sounds like a steep hill you’re dealing with that needs a creative solution. Keep me posted!

@@tonytaylor5087 yeah something tells me helium balloons and rocket power might be a bit too much Wylie Coyote for this county to tolerate. Alternate nitro / alcohol fuel tank ?? Maybe even devising a quick change sprocket . One damn hill is not gonna beat me . Actually it’s a mountain but im gonna chop it down with the edge of my hand🎶

Haha you’re the man!

a stock 80cc without muffler cap can wheelie from +30mph but his bike cant even climb a hill