Who should I send my head to?

[Flyinhillbilly]

So I yanked the head off of the GX120 I just picked up, and it has teeny tiny valves. Who would you suggest I send it to for big valves and why?

 

[KartFab]

Why would you want big valves? Big valves=loss of low end torque and too big =less flow than stock.

 

[bob58o]

Charles Minidragbike Mosley, because his name is Charles Minidragbike Mosley. LOL
https://www.facebook.com/Minidragbike

Charles talks about getting banned from a 4 cycle karting forum at 4:00. LOL
39:00 talks about how Isky Small Engine Cams got started.
42:40 talks about Howard's affiliation and where Pizza Boy from Detroit Hood TV got his engine (paid $2000 LOL)
Brad Hill and Barry Young Flow Contest at 50:00
https://www.facebook.com/Young-Engines-High-Performance-Race-Street-Engines-169195402883/
https://www.facebook.com/Bradhillperformance/

https://www.youtube.com/watch?v=bLZxppsx6xM

$50 for big valve seats.
$25 Valve Job.


http://www.howardsoutdoor.com/category-s/239.htm


I have only used Dyno Cams for headwork (only milling), but will send the 420cc head to Howard's.

---------- Post added at 12:59 PM ---------- Previous post was at 12:45 PM ----------

https://www.cartechbooks.com/techtips/cylinder-head-math-for-engine-performance/
Some good reading about port cross sectional area, valve size, cam lift, and valve curtain area.

 

[Poboy kartman]

Sorry...I couldn't get past the title....since you joined I knew your head wasn't attached securely.

 

[KartFab]

Just read a few of the comments here in this YouTube video.

http://youtu.be/sHgZqL68Rq8

Bigger doesn't always mean better.

 

[Flyinhillbilly]

Thanks guys, car stuff I know by heart, where to send this stuff is a mystery to me.


What I'm trying to do is to get the 120 head on my 160, an I figured bigger valves couldn't hurt anything. It will fit right? If not I have a 120 head with a killer port job, lol.

 

[Joe-405]

Just buy a aftermarket head ready to go. Charles quoted me $200 more than I can buy the head ready to go from nr racing or bullfrog motosport.

---------- Post added at 06:25 PM ---------- Previous post was at 06:22 PM ----------

http://www.nrracing.com/mobile/Product.aspx?ProductCode=HEADHONDA120

 

[chancer]

This guy will "shrink" it for you!

https://www.youtube.com/watch?v=xWhr2xevNKY

 

[bob58o]

Send it to Howard's or Dyno cams for cheap.
The other guys I listed are just some of the more well known builders.

 

[Flyinhillbilly]

I'll probably send it to Howard's, thanks for the info.