Lawnmower Go-Kart drivetrain problem

  • Context: Automotive 
  • Thread starter Thread starter S_McLachlan
  • Start date Start date
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Discussion Overview

The discussion revolves around the challenges of designing a drivetrain for a go-kart powered by a lawnmower engine. Participants explore various methods and components typically used in such projects, including gears, chains, and belts.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • Stuart expresses uncertainty about the best way to connect a lawnmower engine to a go-kart drivetrain and seeks advice on common practices.
  • One participant suggests using pulleys and a drive belt for simplicity and flexibility.
  • Another participant shares their experience with using #35 roller chain for lighter karts and #40 or #41 chain for heavier karts, recommending specific tooth counts for the clutch and drive sprockets to achieve desired speed ratios.
  • A different participant reflects on their own unsuccessful attempt to build a go-kart, ultimately opting to purchase one instead.

Areas of Agreement / Disagreement

There is no consensus on the best drivetrain method, as participants propose different approaches and share varied experiences. The discussion remains unresolved regarding the optimal solution.

Contextual Notes

Participants mention specific components and ratios without providing detailed calculations or assumptions, which may limit the applicability of their suggestions. The discussion does not clarify the specific requirements or constraints of Stuart's project.

S_McLachlan
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I've got myself a lawnmower engine and I'm wanting to make a go-kart. I was going to rig it to a bevel gear combo and then just put it straight onto the back axle but I'm struggling to figure out the drive train.

What is the best way to do this?
What do people normally do? Seems to be a lot of people on youtube making lawnmower engines into stuff.

Forgive my ignorance.

Cheers, Stuart.
 
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For the sake of simplicity and flexibility, I'd be mighty tempted to use pulleys and a drive belt.
 
Welcome Mclach..been a while since I ran one of these..a " fun Kart" typically uses # 35 roller chain..the carnival karts and go cart land cartsuse # 40 or 41 chain but I never had probs with # 35 and this is what the world cart racers runuse a 10 tooth clutch and 60 tooth drive sprocket on light karts..on heavier carts use 12 tooth and 72 tooth final drive sprocket..the 5 to 1 drive ratio give more spped but the 6 to 1 is good compromise.. the 7.2 to 1 is for fat kids...( final drive ratio = drive sprocket teeth count devided by clutch teeth count)
PUT A CHAIN GUARD ON THE WHOLE THING!

www.appcokarting.com

call APPCO Karts, Parts & Accessories at 1-800-676-6636
 
Doing a go kart by yourself is quite compliacte. I have tried it once but it was really bad. That's why i bought a new one and everything is ok! :)
 

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