Motor Work

[blake_mx_racer]

Ok i am wanting to get in the motor sometime really soon. I race mx and only ride on mx tracks. I want to purchase a piston, cam, and get a port and polish and run race fuel. What piston/cam combination would you guys recommend i go with to get a nice power gain. I have a full rossier system, uni filter, and jet kit.

Also will i have to renew my piston every winter to keep the motor fresh and long lasting?

EDIT- Please include prices.

Thanks

[redrider9045]

Well since u already ahve an rossier get there piston and cam but if u dont send ur motor to baldwin

[Kilabanshee]

High Horsepower setup....
1. Baldwin 14.1 piston
2. Chad502ex's DRG porting www.chad502ex.com for more info
3. Hotcam Stage 2

i would call up DASA and talk to Dan, tell him exactly what your looking for and what you would like, he can get you all individual prices and get the parts that will work for you, at the cheapest cost :macho

[blake_mx_racer]

Thanks for the replies guys.



Keep them comin! This is really helpin me.

[Nick110]

Call up or send Rossier an Email and see what they have to offer. I know they have a cam and piston forsale. And Im sure they do porting to.

Im sending my motor to them after this season.

[blake_mx_racer]

The dasa 13.5:1 piston looks like it may a high possibility along with the "pro mx" cam both for $200 each. A local mechanic has a guy that does port and polish for $60 dollars. So if i went with what i said plus about $250 for labor would be about $710.

On Rossiers site it says either a 11.7:1 or remove .040 to yeild a 13.3:1 whatever all that means. Im not to smart when it comes to motor stuff.

[R3Concepts]

Originally posted by blake_mx_racer
The dasa 13.5:1 piston looks like it may a high possibility along with the "pro mx" cam both for $200 each. A local mechanic has a guy that does port and polish for $60 dollars. So if i went with what i said plus about $250 for labor would be about $710.

On Rossiers site it says either a 11.7:1 or remove .040 to yeild a 13.3:1 whatever all that means. Im not to smart when it comes to motor stuff.

Words of wisdom...

Do research. You are more then likely getting in way over your head with the DASA Pro MX cam.

Size up your own ability to work on bikes. Then choose components based on that. IE. A 13:1 JE off the shelf, a simple HC2. All will make good power. Its super easy to get in over your head with motors. I can show you a simple bolt on, stock bore stock stroke, build that pulled 56 all day long.

Have someone reputable do it. Especially the port work, it will make or break the motor and how it works together. And if some guy does it for 60 bucks, its not going to be good whatsoever. Most porters will tell you that it takes 4-8 hrs to port a TRX head. Most also say you have to make between 50-100 bucks an hour to just break even on the time and tooling required.

Me and two of my buddy got Rossier motors and they are great!
For his porting, cam, and pistons!
Great power, and strong as hell!

Best builder in the mid west!
Just my 2 cents!

[blake_mx_racer]

Originally posted by R3Concepts
Words of wisdom...

Do research. You are more then likely getting in way over your head with the DASA Pro MX cam.

Size up your own ability to work on bikes. Then choose components based on that. IE. A 13:1 JE off the shelf, a simple HC2. All will make good power. Its super easy to get in over your head with motors. I can show you a simple bolt on, stock bore stock stroke, build that pulled 56 all day long.

Have someone reputable do it. Especially the port work, it will make or break the motor and how it works together. And if some guy does it for 60 bucks, its not going to be good whatsoever. Most porters will tell you that it takes 4-8 hrs to port a TRX head. Most also say you have to make between 50-100 bucks an hour to just break even on the time and tooling required.

Thanks for the help, so you think a JE 13:1 piston with HC2 would be a good choice. The porting job was done on my friends yfz and it has incredible power now. Most of it came from piston, crank, head, cams, flywheel etc.... I am just goin by what he said about the porting price. I can call up the guy tomorrow and ask him how much it will run me.



jasson450r69, how much did it cost to go with the rossier built up motor?

[R3Concepts]

Originally posted by blake_mx_racer
Thanks for the help, so you think a JE 13:1 piston with HC2 would be a good choice. The porting job was done on my friends yfz and it has incredible power now. Most of it came from piston, crank, head, cams, flywheel etc.... I am just goin by what he said about the porting price. I can call up the guy tomorrow and ask him how much it will run me.



jasson450r69, how much did it cost to go with the rossier built up motor?

Having a drag bike, Ive been through many setups. The cams that Dan uses are Web Cams. They make big power but only temperarily. They are hard on valves, and need to be re-done more often.

Something like a HC2 is PERFECT for MX. A 13:1 JE will run 120ish, and new HC2, 120, your port job, get a good filter 50-100, and you already have a Rossier which is a decent pipe. I would say 45-48 depending on how good the port work is. An FCR carb is a nice addition for MX, and at those numbers you will have more then enough to run B or C competitive.

[blake_mx_racer]

By reading your posts over the past few months you know what your talking about. Id say ill prolly go with the set up you said.

Now do i have to replace the piston every year?

[R3Concepts]

It would be wise to do it every 6-12 months, yes.

A full Rossier motor can be low or high just depends on what you want done,
I got a Ported head
Web- Rossier cam
Piston
Ti intake valves
shaved cylinder
web springs
timing advanced

[gibson400ex]

www.robbsracingengines.com

[blake_mx_racer]

Originally posted by Jasson450r69
A full Rossier motor can be low or high just depends on what you want done,
I got a Ported head
Web- Rossier cam
Piston
Ti intake valves
shaved cylinder
web springs
timing advanced
How much for just ported head, cam, and piston?

[Yamahauler_04]

Someone back there posted about a $60 port job, that scares me.

Anyone worth touching my quad is worth way more than that.

Remember, it's far easier to mess these quads up than it is to make more power.

The other thing is power. I have rode full Pro level quads, and most people don't need that kind of power and it would only tire them out.

You want a good wide usable powerband, not necessarily the most peak power.

[blake_mx_racer]

I agree

What i am wanting to get out of this setup is a reliable engine that will give more power on holeshots etc...

I dont want to get to deep in my motor to where it wont last, thats what i am worried about.

[trost66]

I went with the dase race port. JE 13-8-1 piston and a sparks aggresive dropin cam or the 02 crf I think they are the same thing. I think the 02 crf cam is better for MX than hrc cam. 02 gives you more bottom end. The quad is hard to hold on to now. I love it

[redrider9045]

All i got to say is one if u go with sparks rossier baldwin or w/e saty with them dont go and put baldwin piston some diffrent came and someone else porting it because baldwin piston cams and porting are meant to run together and work better together same with sparks or rossier use the same company for everything

[trost66]

That is what I tried to do with mine. The wait to get the head ported was to long

[djhenson23]

whats does everyone think about a baldwin motor and the rossier exhaust

[mike nash]

Go into the Dyno section, check out DRG 53 hp off the shelf minus porting.

[chad502ex]

Originally posted by Kilabanshee
High Horsepower setup....
1. Baldwin 14.1 piston
2. Chad502ex's DRG porting www.chad502ex.com for more info
3. Hotcam Stage 2

thank you for your support.

[chad502ex]

Originally posted by mike nash
Go into the Dyno section, check out DRG 53 hp off the shelf minus porting.

we'll get you to 55 with what you have,

and on the industry standard freewheel dyno too.


Thanks for your support

[Kilabanshee]

Originally posted by chad502ex
thank you for your support.

Always trying to help a friend!:macho

[hoser 400ex]

joe from rossier did my yfz motor. port polish crank and piston. im running stock cams yet. thing hauls!!

and i can validate joes work on jassons 450 as well that thing flat out rips!!!

luke, it almosts sucks running in the front all the time! LOL

Chad502ex from what i hear too, does good work!

ill be sending chad502ex a crf carb to be bored when i get it!:D

[chad502ex]

Hey thanks Jasson.

How about givingme a call to shoot the shiznit, huh?

[hoser 400ex]

chad do you play with yfz carbs???

[chad502ex]

Originally posted by hoser 400ex
chad do you play with yfz carbs???

what you wanting?

[hoser 400ex]

maybe do a taper bore or something?? i have a rossier p/p head. id ahve to pick up another carb and send it to you.

[chad502ex]

Originally posted by hoser 400ex
maybe do a taper bore or something?? i have a rossier p/p head. id ahve to pick up another carb and send it to you.

I can taper bore machining. You'll need a DASA 43mm billet center ring for $80. Then ship me the carb, ring and I'll dissemble the throttle body of the carb, taper bore and reassembe

[hoser 400ex]

ok i will let you know chad. im sure jasson has your number???

need to get it again!
here is my email chad!
jasson69@frontiernet.net

[jkirk141]

blake
you should try tim at t and s atv in mayfield
he will do it for 300 and ull probly have a week or less turn around time .... budy has it done .... u would insist with a crf carb too

with the yfz carb, you can bore them bigger!

[redrider9045]

NO offense to neone on this thread but if i were u i would go with someone like rossier baldwin or sparks they have been doing that for awhile and they know what there doing dont do a local ive been there and done that and had a motor go