Go Kart Engine Build: Performance Mods

Breathing new life into my old go kart engine by adding a high flow intake, exhaust, re-jetting, timing adjustment, new cam, governor removal, and testing it out.
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Predator 212, 301, & 420 + Honda GX 270/340/390 Performance Upgrades

Valve Grinding/Lapping Compound http://amzn.to/1TCB91P
Feeler Gauge http://amzn.to/1WL9LBG
Valve Lapping Tool http://amzn.to/2aHkOJQ
Assembly Lube http://amzn.to/2b3BcFq
Break In Oil http://amzn.to/2sfK6bq
Timing Light http://amzn.to/2ri8KTC
Degree Wheel http://amzn.to/2s9IU8L
Torque Wrench http://amzn.to/2r6MWLE
Headlight http://amzn.to/2spYbmj
Brake Light http://amzn.to/2s9BXVc
Brake Switch http://amzn.to/2sP76uR
Air Filter Oil http://amzn.to/2r6HlFc
Piston Stop http://amzn.to/2sPo6RA
Flywheel (gear puller) http://amzn.to/2sa45qZ

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46 thoughts on “Go Kart Engine Build: Performance Mods

  1. You are absolutely correct Grant, stock flywheels are enough in 99.9% of any application. I've seen older engines turn upwards of 20,000 RPM and ZERO problems other than the busted block & rod….. It was a stock cast iron wheel. Up untill y'all started making videos, I've never even heard of a flywheel failure…

  2. I agree 100percent on the flywheel. But a lighter flywheel also helps to get to the max rpm quickly. And still can keep it below 5k. But nice job man

  3. Why are you using 5W30 oil in an aircooled engine? With oil temperatures of 120 degrees and more I would use at least a 50 or maybe a 60 weight oil. In my atv (aircooled) Im running castrol 10W50.

  4. Great Video!
    15:50 Next time just tackweld the pieces together and complete the weld off the engine. The plates wont bend if you just tackweld again and again until the weld is complete and let it cool in the meantime. So you dont have to worry about the heat transfering to the block and dont need to hurry taking it off again.

  5. i have twin honda 160 engine whats best mod but dont want it to be loud air 2x filter and 2x bigger carbs and take govener out it aready does 70mph but i want more low end thanks i will subscribe

  6. just when i was going to give up on my manco baja 200 dingo restoration i found your videos thanks alot for all of the tips and restoration videos it helps me alot.

  7. hey nice channel man , im looking to build up a gx390 , for my go kart , it replacing my gx200 will add almost double the weight, i wanna shred as much weight as possible ,so id like to remove the balance shaft , whats your take on it , have you ever done it , do you think it will vibrate way to much

  8. Nice work mate. You certainly went to town on the mods for the motor.
    Your exhaust header looks great. I did the same on my wifes kart. The pipe I used has a 28 mm i.d. and matched up perfectly with the exhaust outlet. Sounds a lot better. Hers runs a 16 hp clone .
    Looking into a carb kit and filter for it now.
    Great info . Cheers mate 👍

  9. You are correct I have only had one problem with a guenuin fly wheel and it cracked because I over reved the engine and it locked up immediately so the key stop or what ever you want to call it grabbed the fly wheel and it cracked the spot next to the key stop on the fly wheel lol

  10. hey i have a 688cc twin cylinder briggs boxer engine and I'm going to be upgrading to billet connecting rods but i was wondering if its ok to upgrade just the connecting rods and still use the stock pistons? feedback would be greatly appreciated 🙂

  11. I have a Coleman CT200U and I removed the governor but while doing the my friend lifted the bike up while the side casing was still open and the camshaft came out and the lifters I put it all back to how it was but couldn't adjust the valves took it to a friend he didn't know and when we tried to fix it , it ran and then locked up … What can I do ? Plz help very frustrated

  12. try to find an enclosed air filter assembly, kubota rtv's have a dual filter system and is designed to adapt to snorkle.saves having to clean and re oil filter.great vids btw!

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