What should I use?

[Kenny_McCormic]

Good info.

 

[sayre315]

well if i were to mod a honda or a clone the first thing i would get would be a ARC flywheel just incase somthin happens

i mean, if i could choose 1 of those three things that can happen to not happen with spinning a stock engine that high
it would be the flywheel

 

[Kenny_McCormic]

They will take 12k before the magnet flys off, more than one person has tested and confirmed this.

 

[oscaryu1]

These days the Clone ARC Billet flywheels are only $100. If you can't afford a billet flywheel to save your life, don't remove the governor.

 

[sayre315]

exactly wat i said

 

[Jerryburger]

Try to "wait out" Harbor Freight on these engines... they usually put them on sale during a week or so each month. Get on their mailing list. For a BUDGET BEATER, keep a close eye out for old edgers, roto-tillers, or reel mowers with horizontal-shaft motors. I would recommend 3hp minimum, because although the stock B/S 2hp can propel a fat guy (ME) in a small kart (Treefrog) to just under 30mph, you'll want the starting acceleration of the 3hp. Big difference, as one has 33% more displacement.
If you DO have the money for the HarborFreight 6.5hp motor, you won't be disappointed, even running it box stock. Gear it to do 30mph @ 3600 rpm (calculator available in this forum/site) and it'll accelerate nicely. I have a kart geared for 38mph, and it's a bit sluggish off the line, but I'm fatter than most people here! With my daughter (100lbs) in it, the thing flies.

 

[Jerryburger]

Here is short vid to show the B/S 2hp in action...
http://s107.photobucket.com/albums/m290/jerryassburger/?action=view&current=CarlTreefrog2hp.flv
My friend weighs about 190lbs and this is on level ground.

 

[oscaryu1]

"Needs more motor"

 

[shurikanx1]

Try to "wait out" Harbor Freight on these engines... they usually put them on sale during a week or so each month. Get on their mailing list. For a BUDGET BEATER, keep a close eye out for old edgers, roto-tillers, or reel mowers with horizontal-shaft motors. I would recommend 3hp minimum, because although the stock B/S 2hp can propel a fat guy (ME) in a small kart (Treefrog) to just under 30mph, you'll want the starting acceleration of the 3hp. Big difference, as one has 33% more displacement.
If you DO have the money for the HarborFreight 6.5hp motor, you won't be disappointed, even running it box stock. Gear it to do 30mph @ 3600 rpm (calculator available in this forum/site) and it'll accelerate nicely. I have a kart geared for 38mph, and it's a bit sluggish off the line, but I'm fatter than most people here! With my daughter (100lbs) in it, the thing flies.

If I were to set it higher than 30MPH what should it be? Or should I even go any higher?

Also, I weigh close to 140 and my go kart will proably be around probably average of most I'm thinking, how fast would it go if I geared to 30mph @3600 rpm

 

[Jerryburger]

This is from personal experience... with the 6.5 hp (stock) and the gearing at 38mph @ 3600 rpm, I was able to hit 48mph. (Holding the throttle butterfly open and over-riding the gov.) This gearing and kart is mainly for parking lots, streets, nothing too crazy hill-wise. If you intend to use yours the same way, and you're satisfied with the 38mph top speed go for the same gearing. If you want to do horsing-around... burn-outs, etc... I would shoot for gearing it to 30mph @ 3600 rpm, and then the modify the motor to rev higher and take the abuse.
I haven't had the extra money to build any of my HF 6.5hp motors, so they're all stock. The high-speed (48mph) was just a quick "let's see what it'll do" thing.

 

[shurikanx1]

Ok I'll stick with the 30mph @ 3600 rpm then since that sort of of I wanna do is just play around and stuff

Also just so I dont have to make another post, how much would the frame proably cost (just like the the size of most others I think) to buy all the metal. Already have a friend who can do the welding for me.

 

[Jerryburger]

Metal is pretty stinking expensive lately. I get what I need at a local scrap-yard, and I'd guestimate about $50-$60 for the metal. I've been turning to use old bedframe rails (1 1/2" L shaped) which can be had for pretty cheap when you find 'em.

 

[shurikanx1]

Don't know any local scrap yards here but can probably find some, and could I use parts from some of my old bicycles?

 

[AutoMX]

most non-fancy bikes are standard steel which is perfect for welding though you gotta weigh if the bike is better off being sold or cut apart. contact the local junkyards and landfills. my local trash people allow oversized item pickup so i bet they get a bunch of metal stuff like bed frames, sofa frames, and a million other possible things. also check hardware stores for quality metal (none of that conduit junk).

 

[Jerryburger]

The scrapyard I go to is actually a recycler, and I buy their remnants. If you search through the PhotoGallery Section, you'll find karts built from all sorts of things, and usually the builder will have detailed the process- at the very least, it'll help you develop your own ideas.