Author Topic: what mods can i do to my B&S 6.5hp engine?  (Read 2358 times)

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Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #15 on: March 18, 2020, 11:06:24 AM »
Letís start here. 

http://www.heymow.com/index.php/topic,2590.0.html

what if i was lying?

Then you wonít be here for long. 

What is your budget?    That will determine how far you can go.  Is it $5 or is it $5000.

Depending on budget you may be better off finding a different engine.
Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing


Offline loggers gogert

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #16 on: March 19, 2020, 09:50:47 AM »
thank you.....and I'm sorry guys for my attitude as for i just haven't had any luck with other forums..
my budget is around 1000$, maybe more


Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #17 on: March 19, 2020, 11:15:26 AM »
Is this a horizontal OHV engine?   Iím not familiar with the smaller Briggs engines. 

Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing

Offline loggers gogert

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #18 on: March 23, 2020, 08:13:36 AM »
yes it is

Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #19 on: March 23, 2020, 11:39:19 AM »
I'm not sure what is available for that engine.

If your removing governor you will need a billet flywheel and billet rod. 

Probably going to need to do something with the valve springs and retainers.

For more performance a better cam and Carb are next.

Although you can probably find a used built clone engine for less money.
Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing


Offline loggers gogert

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #20 on: March 24, 2020, 10:17:12 AM »
if heard people talking about clone engines...but what are they?


Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #21 on: March 24, 2020, 11:31:06 AM »
A clone of a Honda engine.  Sold by retailers such as harbor freight.  All the Honda parts fit.   There are a lot of performance parts for the Honda.
Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing

Offline loggers gogert

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #22 on: March 25, 2020, 10:14:45 AM »
okay, for now I'm just going to forget about that little engine because i don't really want to do it anymore....
but.....i DO have an offroad mower that I'm building with a 16.5 oppy, what do you suggest i do to it ( internal mods) i don't want to make a ton of power as for i want to save some money, but i was thinking a flywheel of course, and maybe some billet rods? and removing the governor?

Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #23 on: March 25, 2020, 07:05:47 PM »
Flywheel and ride are a must if removing governor from an opposed twin.  Leave the rest stock and you will have cheap fun.   

If you only remove the governor you will shoot a rod through the block or die when the flywheel explodes.   
Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing

Offline loggers gogert

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #24 on: March 26, 2020, 06:50:56 AM »
lol yeah, i know about the rod exploding out and flywheel coming apart, i had a buddy one time that was gonna remove the governor on his 300ish cc gokart and i was like
"NO, IT WILL FLY APART AND U WILL DIE!"

Offline CedarHill

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #25 on: April 05, 2020, 05:21:14 PM »
I got about 13 hp out of a 6.5 hp 212 cc predator engine with less than 6 bucks. I strait piped it, removed the governor, made a custom air filter, and jetted the carb. The thing shot 6 inch flames out the exhaust then blew up putting a hole in the crankcase. Donít rev it under no load and Iíd say your fine. The engine was a couple years old and ran hard. Also their only $99 at harbor freight. Just remember, more air flow = more power. One thing to watch with the small engines at high rpm is if the pressure release on the cam gets stuck. If this happens it will be really hard to pull on the starting cord and you just have to open up the crankcase and tap it to get it to move.

Offline CedarHill

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #26 on: April 05, 2020, 05:29:17 PM »
Ive witnessed two engines exploding and the situations didnít seem dangerous to me. Both times it just suddenly stopped there wasnít any big explosion or anything flying in different directions. Both times the rod gave out at the crankshaft. Both highly modified 212 clones

Offline cycloneracer

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #27 on: April 05, 2020, 10:42:41 PM »
I got about 13 hp out of a 6.5 hp 212 cc predator engine with less than 6 bucks. I strait piped it, removed the governor, made a custom air filter, and jetted the carb. The thing shot 6 inch flames out the exhaust then blew up putting a hole in the crankcase. Donít rev it under no load and Iíd say your fine. The engine was a couple years old and ran hard. Also their only $99 at harbor freight. Just remember, more air flow = more power. One thing to watch with the small engines at high rpm is if the pressure release on the cam gets stuck. If this happens it will be really hard to pull on the starting cord and you just have to open up the crankcase and tap it to get it to move.

Dyno sheet?   

No way you double the horsepower by jetting the carb.   Flames out of exhaust is too rich and less horsepower. 

If you remove the governor you need a billet flywheel for safety. 
Paul Krueger

****2017 USLMRA FXT points Champion****

#150 Worlds First "sidewinder" FX (now dismantled)

#150 FXT  Sponsored by Zach Kerber Machine. http://zkbrmachine.com/

Easy Parcheesy Racing

Offline CedarHill

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #28 on: April 06, 2020, 06:59:51 AM »
I used a video on YouTube that tested different stages of modification on the predator 212 engines.

Offline CedarHill

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Re: what mods can i do to my B&S 6.5hp engine?
« Reply #29 on: April 06, 2020, 07:07:53 AM »
This site show the different upgrade you can do to your predator 212 and other similar engines to get what they say is 26 hp. I did everything that didn't cost anything.
https://gokartsusa.com/Predator-212-Engine-Perfmance-Parts.aspx

 

anything