want to build a 25+hp clone

[Hothead79]

im thinking of starting to build a clone and id like to try and get 25-30hp on gas. already have a flat-top piston, ordered a .020 rod. I need ideas for the top end set-up, and id like a big cam, mayb a 356 or bigger lift cam and a matching set-up. Im building a bike to run 1/4 mile. any info is greatly appreciated. Thanks

 

[bandit 40]

Theirs lots of info in the clone section :thumbsup:

 

[flowerman]

Well for a start I would read this AGK - Performance Basics - Affordable Go Karts

And be prepared to have an extremely thin wallet if you want 25hp+. I would start with a genuin Honda engine if you want to get 25hp out of it. Just because I've seen clone engine blocks crack with their governors removed.

Good luck and be prepared to spend $$$$$

 

[Hothead79]

Thank

its going to b a slow build, but the thin wallet will be worth it in the end! :thumbsup:

 

[badtec]

390...13hp "Clone". Lots of parts available.

 

[Miniwood]

These guys do it for a living and 15 hp is pretty extreme!!!
But if you gave a few grand you might have a shot!
You will need a turbo or forced induction to get over 20 hp on a 6.5 clone block.

NR RACING

 

[cheezy1]

These guys do it for a living and 15 hp is pretty extreme!!!
But if you gave a few grand you might have a shot!
You will need a turbo or forced induction to get over 20 hp on a 6.5 clone block.

NR RACING

Huh????? :no:

 

[minidragbike]

These guys do it for a living and 15 hp is pretty extreme!!!
But if you gave a few grand you might have a shot!
You will need a turbo or forced induction to get over 20 hp on a 6.5 clone block.

NR RACING

Hahaha, Naw, force induction isn't needed.

 

[minidragbike]

Well for a start I would read this AGK - Performance Basics - Affordable Go Karts

And be prepared to have an extremely thin wallet if you want 25hp+. I would start with a genuin Honda engine if you want to get 25hp out of it. Just because I've seen clone engine blocks crack with their governors removed.

Good luck and be prepared to spend $$$$$

This guy is right
Also you would need a bigger than stock size motor. The bigger the easier to.make power with.

This is what you want, pull start, gasoline, at least 25hp

If you have never built it before you can't tell us the combo of parts to run.

 

[minidragbike]

This is what's needed

Honda block
Honda crank
Machined to 3" bore
Super big valve head, 32mm/28mm valves 22cc chamber
28mm carb
.315" Isky can
1.3 ratio roller rockers
2.992" Arias piston from Isky
3.707" ARC billet rod
HD wristpin
ARC flywheel, 30 degrees timing

25-27hp

 

[sohc50]

how much would it cost to put this motor combo together?

This is what's needed

Honda block
Honda crank
Machined to 3" bore
Super big valve head, 32mm/28mm valves 22cc chamber
28mm carb
.315" Isky can
1.3 ratio roller rockers
2.992" Arias piston from Isky
3.707" ARC billet rod
HD wristpin
ARC flywheel, 30 degrees timing

25-27hp

 

[minidragbike]

how much would it cost to put this motor combo together?

A lot of money, most people but the parts a little at a time. Then send the block to me for machine work. All at one time maybe $1300

 

[Hothead79]

It doesnt need to be pull start, i was planning on getting a mini starter for this one. But I was trying to keep it on gas if possible.

 

[Hothead79]

Is this kit worth the $? eBay - New & used electronics, cars, apparel, collectibles, sporting goods & more at low prices

 

[rmm727]

Thats like paying full price for half a Predator and and still not getting the extra 1mm of stroke.

 

[Hothead79]

A lot of money, most people but the parts a little at a time. Then send the block to me for machine work. All at one time maybe $1300[/QUOTE

Will i need to sleeve the block for a 3"bore?

 

[rmm727]

I thought about that kit some more. Its must be a 208cc short block. You can buy a new z-208 motor from b-mkarting.com and with bigger valves in the head for $140.

 

[minidragbike]

A lot of money, most people but the parts a little at a time. Then send the block to me for machine work. All at one time maybe $1300[/QUOTE

Will i need to sleeve the block for a 3"bore?

Yep, that's what I do
That kit isn't even close to what I'm talking about.

 

[Hothead79]

Yep, that's what I do
That kit isn't even close to what I'm talking about.

In ur honest opinion, $ wise for the power, is it worth building a small block or go for a big block?

 

[minidragbike]

In ur honest opinion, $ wise for the power, is it worth building a small block or go for a big block?

25hp vs 25hp, the smaller block will win. It's about 20 pounds lighter and it will rev about 1000 RPM higher. Which means more speed

The bigger gx390 would need to be 30hp. But it will cost more to build.