Hi I want to make a go Kart(first time), I have a question... I have a 3.5hp engine, 3600rpm. Don't have a tire size yet... How ever I would like to know what gear ratio will be best for this kart as I want a speed of about 30 to 35 m/h. So what would be a good balance for power and speed? Thanks Elin.
Gear ratio help!!!
- Thread starter Elin
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Denny
Canned Monster
I don’t think a 3.5hp engine will push you that fast. Maybe 20-25. A 5-6hp would be better. What kind of riding are you going to be doing?
Around the block and area really.. If I were to do that speed, what would the gear ratio then be? So the ground would be smooth and tar..
ride around the area........does that mean off road Dirt, hills, mud, rocks...........or pavement. It makes a difference. a difference in tires, gearing,
horses etc. generally speaking 1 to 6 is the best......10 teeth on drive sprocket....60 teeth on axle sprocket.
Da redflash
horses etc. generally speaking 1 to 6 is the best......10 teeth on drive sprocket....60 teeth on axle sprocket.
Da redflash
panchothedog
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Removing the governor on that engine probably won't make any difference. Not that it couldn't spin faster ( with no load ) but trying to push a go kart with a full sized human being on board it doesn't produce enough power (GRUNT) to get up to a fast RPM. It takes horse power to overcome resistance and your engine doesn't have enough of it.
Denny
Canned Monster
Pancho said it the nicest way possible and best. Not to mention there aren’t any upgrades available for that engine either!
Thepartsguy
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there still useless but there are a ton of performance upgrades to the 3/3.5hp.. You just can’t buy them over the internet. Except for the billet flywheel. And when you get the flywheel you get the 30 degrees advance built into the keyway.
BaconBitRacing
Well-known member
I only see the use of a 3.5 on a period mini bike.
Karttekk
Well-known member
Trying to boost the performance of that engine isn't cost effective. Ordering or picking up one of these Ironton engines from Northern Tool would be a better choice if an option for you or a Predator for that matter.