Pump Gas

[grant14]

building a new bike, but trying to stay on pump gas with this one... what are some of the best set up for a 30+ Motocrosser on pump gas that guys have run?

[njquadracer11]

stock piston, head work, and stage 2 hot cam

[grant14]

is the stage 2 cam better than the hrc cam? and who did your head work?

[njquadracer11]

yes the stage 2 cam is better and baldwin did my head but if you can find someone local that can do a good job that would be fine

[Kovatch]

12.5:1 piston - CP
Ported head - Baldwin
Cams - Baldwin

I've seen good results from that combo. I have also seen a nice setup with the same but Web cams.

[01boneless]

im in ur same shoes
JE 12:1
02 crf cam or stg 2 cam
GOOD head work
NOTE some local may not be able to port and polish yor head becuase 04-05 somtimes have to have exoxy filled ports then polished iirc

[grant14]

I have an 06 that is set up for race gas. 14:1 piston head work , stage 2 cam, etc...

was going to build a new bike and wanted to get away from the race gas... it has gotten to be both expensive and a pain to get here.

but i have gotten used to having the power and don't want to give up to much. I have never even rode the old bike stock, so i don't even have a real comparsion from where it started.

[Balaz_73*00]

Save some money and port it yourself. Get a dremel and make the ports as huge as possible. The bigger the better.

[Scro]

Originally posted by Balaz_73*00
Save some money and port it yourself. Get a dremel and make the ports as huge as possible. The bigger the better.

I hope he picks up on your sarcasm.

[Balaz_73*00]

LOL I hope so too Scro! Just messing around guy. I hear DRG is doing some good work. I want to try them on my next head. http://www.chad502ex.com/index_files/porting.htm

[grant14]

Don't worry, sarcasm is my preferred form of comunication according to my ex-wife...

so i did just bring a new trx 450 home though... not joking :)

now i just need to go to work on it...

[BlaineKaiser450]

I had a 12.5:1 CP Piston, locally ported head, and a stage 2 hotcam and it was an awesome combo

[jkiserracing]

Im a +30 mx'er too. I have an 08 that I didn't really want to a lot of motor work to but at the same time I didn't want a stock one either. Norris Quinn does my engine and shock work. What we did was simply:

CRF450 cam and a CRF450 head gasket. The head gasket is thinner than the TRX one which actually raised the comp without repalcing the piston. My motor is now basically equiv to the CRF motor (or a close 2nd) I use no airbox lid and a K&N as well. A good pipe (like DASA or Sparks etc) and you'll have pretty much what you want without tapping into the wallet too bad AND still be able to use pump gas.

[grant14]

short term i've ordered a hotcam stage 2 cam. i'll do all of the hrc needle/jet etc... remove the airbox lid, i already have extra filters and a yoshimura pipe. And work through a port job, later this winter.

[grant14]

So hotcam stage 2 installed, rejetted, and easy engine mods made. Jb a-arms and swingarm, pep shocks and bunch of Pro-Armor stuff, guess i will find out next weekend how it really runs...

[01boneless]

good looking bike bro you will like the HC stage 2 were did you buy the cam at anyway?

[grant14]

Cam came from rocky mountian atv.... along with the. Tires and brake lines.

[jkiserracing]

Looks good. Were the same number!

[Pacheco_450r]

Looks good! I'm interested to see how you like the stage 2 cam. I have the same mods on my 05 other than the cam, so I'm still on the fence about which cam I want.

[grant14]

i have one in my other bike, and like it, but it has a bunch of mods... so it will be interesting to see. ran good up and down the street :D

[Pacheco_450r]

Yea I hear it's a great cam! I'm just wondering how it will affect low end since it's considered more of a top end cam.