50 Comments

  1. Gabs F. Zago on September 6, 2022 at 1:05 am

    Absolutely perfect! This is exactly what I was looking for



  2. beau brummel on September 6, 2022 at 1:05 am

    Thanks so much for this video, it is the easiest, simplest explanation I’ve seen on gear ratio’s. I shared it on my facebook group, about motorized bikes. The members over there have a hard time understanding gears, ratio’s, CVT torque converters and how to figure it out. I hope they watch and learn and subscribe to your informative channel.



  3. Mr. Turtle on September 6, 2022 at 1:08 am

    Great video, but I have one question if anyone could help me. I am still wondering what gear ratio I should use for a 6 hp engine with 15 inch tires, that allows the machine to accelerate easily and have a decent top speed?



  4. Landon Thomas on September 6, 2022 at 1:08 am

    My question has always been whats a good gear ratio for decent acceleration and decent top speed over 45 for stage 1 with governor removal basic stage 1 I have seen some stage ones go 52 but I dont need like all of that so whats a good gear ratio 14 front and 62 back? No converter



  5. graftonreed on September 6, 2022 at 1:09 am

    Consider engine size, tire size, torque converter, jackshaft and axle sprockets. Is 5:1 on a stock 6.5 hp predator with 18 in wheels ideal, or would that 5:1 ratio work every better on a stage 1 predator at 8.8 hp and 16 inch wheels. You’re looking for that optimum sweet spot …. strong torque out of the whole, yet a decent top speed as well. Experience will tell you how to modify the ratio, and the best combination needed to achieve it. Sometimes you’ve gotta just keep swapping parts until you get it just right. No biggie. That’s how you learn.



  6. Numa Newbern on September 6, 2022 at 1:09 am

    I’m putting a PREDATOR 8 HP (301cc) OHV Horizontal Shaft Gas Engine, using the centrifugal clutch on a lawnmower frame, can I NOT use a jack shaft and connect directly to a axle using a chain and have a decent speed where I can cut grass?? I don’t need 20mph, is such possible and what axle size number of teeth do I need? I only need no more than 10 mph



  7. mike fawcett on September 6, 2022 at 1:10 am

    What about weight factors for the top speed?



  8. Joseph Barnes on September 6, 2022 at 1:11 am

    Just what i was looking for



  9. robert colaluca on September 6, 2022 at 1:11 am

    You added the start ratio and multiplied the end ratio that confuses me. 3 * 2 * 3 is 18 is there any way you can clarify this



  10. Brezjoe on September 6, 2022 at 1:12 am

    Brilliant, Thank you 🙂



  11. archivestereo on September 6, 2022 at 1:13 am

    This is really helpful and you explain it perfectly. Thank you!!!!



  12. Soundgamer 11 on September 6, 2022 at 1:14 am

    Absolutely the goat thank you so much 👍



  13. Miguel Pagan Sr on September 6, 2022 at 1:17 am

    What would your recommendation be? I’m looking to do a minibike build but I’m trying to keep it simple. I’d like to have some take off in city traffic and still have decent top speed, I know that this might be a long stretch but it’s worth asking. Thanks for the video and ride safe.



  14. brook morgan on September 6, 2022 at 1:26 am

    Thanks for the video and explanation! I’m building a time machine and wasn’t sure of the gear ratio of the drive converter. This really helped! I’m gonna SMASH the like button.



  15. William Edwards on September 6, 2022 at 1:28 am

    So I have a mini chopper that has a 12 tooth centrifugal clutch with a 35 chain running to a 72 tooth rear sprocket no governor 43 miles an hour maybe I want my bike to do 60 and have a number 40 chain what rear sprocket would I need if I got a number 40 10 tooth centrifugal clutch with a 40 chain what rear sprocket would give me the highest top speed but still be able to take off



  16. Linloucf Gouyg on September 6, 2022 at 1:29 am

    When I run chain I get 60 mph gps confirm. I can never get anywhere close running belt.



  17. maria metko on September 6, 2022 at 1:29 am

    What’s the best drive and driven sprocket combination so I can solve the over slack in the rear chain to my Coleman ct200uex ?

    I’m finding out that this causes bearing problems to the driver bearing.
    Thanks. Great video.



  18. Randy G on September 6, 2022 at 1:30 am

    Coleman CT200U 20mph? Ummmmm well I have worked on several CT200U and EX and 28-30mph is what I get stock with the governor still installed.



  19. Nayeem Farween on September 6, 2022 at 1:30 am

    Bro… what is the chain size needs for 125cc – 150cc bike, pls reply, thanks…



  20. Marv The Great on September 6, 2022 at 1:30 am

    I must have screwed up 😂 maybe someone else could figure it out. 1997 cr125 I would like to put a predator 212 with cvt. 12 tooth to 36 tooth and 26 inch tires. I came up with 97 mph😳😳that can’t be right 🧐



  21. Andrew Downey on September 6, 2022 at 1:31 am

    Hi, if you could could please help me out.
    Just installed a 30 series on my coleman.
    So TC belt to 10 tooth spocket to 50 tooth rear sprocket. If I fallow you thats 1-5 ratio.
    Im getting 49mph at 4400 rpm.
    However thats at max throttle.
    Im not getting any higher rpm with load. Im only 130lbs aswell.
    The calculator says Im spot on but why the max of 4400 rpm with gov removed?



  22. Bruce Schmitz on September 6, 2022 at 1:32 am

    What about a 10 on front and 60 tooth on back with a torque converter



  23. Garrett Lovell on September 6, 2022 at 1:32 am

    quick question, the higher the first number is the better the takeoff right??



  24. JNC on September 6, 2022 at 1:35 am

    Hi, I’m too stupid to understand Math formulas so maybe you can do the math for me lol ? I have a 196cc Stock engine on my mini bike and I did add a 30 series Torque Converter to it along with Governor Bypassed and Stage 2 upgrade Kit. Right now I have an 11 Tooth Sprocket in the front and the Stock 50 Tooth in the rear and as it sits now it does 41 mph. Now I am thinking about changing the sprockets to gain a better top speed. Was going to change the 11 tooth in front to a 12 tooth and change the 50 tooth in the rear to a 48 tooth. If I did that then what would my final ratio be and how close to the 50 mph mark would I get ?



  25. GNE on September 6, 2022 at 1:36 am

    I am having trouble calculating this pls help thx 6000÷25:4× it is a 14.5 in wheel (dont know the diameter)× 3.14 ÷12÷5280×60



  26. james on September 6, 2022 at 1:36 am

    great video bud, i need to figure my bikes out to make more top speed .



  27. Alpha Romeo on September 6, 2022 at 1:37 am

    👍 very helpful



  28. xXZeroxgamerXx ;-; on September 6, 2022 at 1:37 am

    Thank you very much I was trying to figure out why my mini bike for the power behind the motor was going so slow and just by putting a 20t sprocket on my torque runner shaft I could be doing 82.01 vs the 38 sum I was going



  29. Lex Pro on September 6, 2022 at 1:38 am

    Pi* great video, thank you for your help!



  30. Jimmy Marin on September 6, 2022 at 1:38 am

    Hi I just bought a ct200u with a predator 212 engine I installed a new clutch 10t with rear sprocket 50t.the problem I’m having is that when I start it up it’s great further pull start,but when I sit down to take off it moves slowly at full throttle.not sure what’s wrong,do you think the clutch might be slipping or not fully engaged,because the clutch also gets real hot.please help anyone😰



  31. aNgRY cRUiZer2O3 on September 6, 2022 at 1:40 am

    i just bought a maxtorque 13tooth clutch for my bike it has a 65tooth rear what is that make my ratio or top speed its on a ducar212cc



  32. mena mohib on September 6, 2022 at 1:40 am

    can you tell me formulae in Si system



  33. Patrick C. on September 6, 2022 at 1:42 am

    You explained it well, thanks! I’m going with a TC direct mounted to a jackshaft that’s turning a 10T to a 39T axle sprocket with 22" tires. All this pushed by a 420cc with a couple of mods. I’ve got great expectations for this build. Again TY!



  34. BAAH Motorsports on September 6, 2022 at 1:43 am

    Good video except a predator 212 turns about 4685 with the throttle screw removed



  35. Jp Pelletier on September 6, 2022 at 1:43 am

    Why not have a larger gear driving the driven gear at the wheel? Wouldn’t that improve the overall top speed?



  36. base72588 on September 6, 2022 at 1:43 am

    For those of us building track sleds this gets us close i think, BUT for Us the mini bike tire is basically our drive cog that drives the sleds track. Does the final speed change after putting a for example 121" track on the tire of the mini bike or in our case the drive cog?



  37. Bonezy on September 6, 2022 at 1:45 am

    Thank you, I’m building and electric mountain board and this was extremely helpful.



  38. Splish on September 6, 2022 at 1:45 am

    So i got a brand new coleman ct100u. I have no idea what the stock sprockets are but its a 99cc 3hp engine. What would be the best gear ratio for top speed?



  39. Jay Spice on September 6, 2022 at 1:47 am

    Thank You So Much For This. I was unsure of the gear ratio of the cvt(torque converter) and you saved me so much time on my project. U just got a subscriber.



  40. Hanafi Ismail on September 6, 2022 at 1:47 am

    Thanks.. Start thinking, what should to do..



  41. Ramiro Berumen on September 6, 2022 at 1:48 am

    Thanks for sharing your wisdom brother helped me a lot!!



  42. lot maakchos on September 6, 2022 at 1:48 am

    Really good video.



  43. Goomer on September 6, 2022 at 1:54 am

    Thanks, with just a clutch-jackshaft should you shoot for 6:1. Does the wheel diameter effect this. I was running 10-36-10-30 on 16 inch diameter tires.



  44. Pase-Oh on September 6, 2022 at 1:54 am

    I have a mega moto 212, added juggernaut and it got slower. Built the motor and same results. What sprocket should I use for the juggernaut? Any help please!!



  45. Akhilesh Ezra on September 6, 2022 at 1:54 am

    so weight doesnt come in??



  46. K H on September 6, 2022 at 1:57 am

    Went from completely not knowing now it seems very easy to calculate, Thank You!



  47. TOM TEE on September 6, 2022 at 1:59 am

    I new their was a formula. motorized 4 stroke bike, jackshaft, 9 tooth torque converter, stock 50 tooth rear sprocket. Have a 66 rear tooth sproket going to try. Hope I’m not to rpm tached out at 12 mph max at times where I ride at for short periods. I want all take off and bottom end power hope 66 sproket is enough!



  48. dylan sherwood on September 6, 2022 at 2:00 am

    So I’ve gor a predator 212 on my mini bike it goes roughly 40 mph with the torque convertor. My rear sprocket is 31 tooth. So if I wanted to go faster what size sprocket should I use in the rear 🤔



  49. messin with mike on September 6, 2022 at 2:01 am

    thats only if the motor makes enough power to do that and depends on how heavy the rider is and the bike, more weight the slower it will be! and if you have a weak motor and it wont get anywhere near those MPH’s.



  50. Anthony Pineda on September 6, 2022 at 2:03 am

    Youre awesome, thank you so much and keep up the hard work