Good Question for Honda and it's cam

[DirtDevilBT]

If I understand correctly, and please correct me if I'm wrong, the crf cam is being used as a "sparks performance cam". The crf cam is said to give more power throught the rmp range. The crf cam is the sh*t, the this and that...

Why do I have a CRF motor in my quad but not a CRF cam!!!!!

I don't know why Honda decided to put a different profile cam in the quad that received the CRF motor when this cam is the better running one?

Am I over thinking this one? Am I looking at the feedback on the CRF and Sparks cam wrong? Is there some conspieracy? Will I ever find my dictionary?:D :p

[mikes450r]

if you call sparks on it they will probably tell you they modified it to make it better..:devil:

i know i bought it from them...lol

[29FTEX]

It's not a CRF motor, it's a CRF derived motor. The bore and stroke are different from the TRX to the CRF. The head is different and the exhaust valves are bigger on the CRF head. The transmission gearing is different. There were many changes that were made to deal with the weight difference of the bike and quad to enhance reliability. The "milder" cam was just one of those factors. The 450R could possibly become what the 250R was. "The best quad the aftermarket companies ever made".

[chad502ex]

Originally posted by 29FTEX
"The best quad the aftermarket companies ever made".

:D

[29FTEX]

Originally posted by chad502ex
:D

Yeah, we both have "aftermarket" quads, don't we? :D Gotta love 'em. Thanks Honda for the jump start.

[DirtDevilBT]

Well, it is still strange that Honda (being in a race against yamaha for best quad) didn't go ahead and use the stock CRF cam. With the TRX cam, now they are making 2 different cams for the same but yes different motor. It seems like a waste of money. Plus, if Honda was worried in any way about reliability with the CRF cam, WHY do they have an HRC cam that doesn't void warrenty?

I mean, I really don't care. It just seems fishy, like a waste of money, or an easy way to make money selling CRF cams to TRX owners.:rolleyes:

[Mikenar]

i think it has something to do with passing certain emmissions guidlines or something, thats why it says RACE only, prolly to pass some weird california laws or something.. yay california!

[416exmx]

Originally posted by DirtDevilBT


Why do I have a CRF motor in my quad but not a CRF cam!!!!!




if you ever had a TRUE CRF powered quad, you would realize you dont have a CRF motor.

[beak7707]

Also from what I gather all the crf cams are different. For example I have the sparks aggressive which is supposed to be the 02crf cam. It gives alot more lowend than the stocker and also adds a little up top. Where the 04crf is supposed to offer alot more topend. So even if they would have put a crf cam in it which one would they have used? XC racers like the 02 where MX'ers like the 04. So honda just put a decent cam in it and we all have a bunch of options to tune our motors to our pleasing. I think the 400ex is the same way, I'm pretty sure you can run the dirtbike cam in it.

[Jonas]

Honda wants to build a stock quad that will last far beyond their 6 month warranty. This will sell the next Honda that you buy. If they put the hrc cam in, out of the box, I guarrantee you that the motor will not go near as long without the need for a new piston, rings, etc..

Also, never lose sight of the fact that lawyers run this country. If Honda wanted to make a full on race quad with 10 more horsepower stock than the competition they could easily do it. But you don't want to stand out too far in a judges eyes and that's what it all comes down to.

[tdsongster]

I asked Colby the same thing, why doesn't Honda build the 400ex with more power. The answer to this is two fold, honda wins a lot of races simply because it doesn't break (reliability) and they are concerned about the liability of building the fastest stock quad on the market. Lets face it, the 400ex doesn't have near the power of many of the other quads, but is still the choice of a lot of racers. I did a lot of homework before I bought mine and 90% said build a 400ex to what you want. So far they have been dead on, I have had 0 problems with my 400.

[DirtDevilBT]

Nice responses! Ok, I am starting to see the picture. And that lawyer thing, ain't that the truth!

[roughrider01]

Originally posted by Jonas
Also, never lose sight of the fact that lawyers run this country. If Honda wanted to make a full on race quad with 10 more horsepower stock than the competition they could easily do it. But you don't want to stand out too far in a judges eyes and that's what it all comes down to.

Yup, my thought exactly.

[kazpr]

Originally posted by beak7707
Also from what I gather all the crf cams are different. For example I have the sparks aggressive which is supposed to be the 02crf cam. It gives alot more lowend than the stocker and also adds a little up top. Where the 04crf is supposed to offer alot more topend.
02 and 04 cams are the exact same part #'s from service honda. 03 is a different # though. Hope that helps.

[bigfoot300ex]

so do yall think the 02 or 04 crf cam would be a good mx cam?

[HP1]

2004-5 TRX450R - 14110-HP1-670

HRC cam - 14110-NLZ-650

2002 CRF450R - 14110-MEB-670

2003 CRF450R - 14110-MEB-770

2004 CRF450R - 14110-MEN-670

Each cam is a little different, thus a different part number for each of them.

[mikes450r]

so it would look like the 02 cam is better to honda since they went back to it in 04 right...what do you guys think..mike

[Jonas]

you might want to re-check the part #'s at your honda dealer I'm not sure if both those years have the same #.

[HP1]

Originally posted by mikes450r
so it would look like the 02 cam is better to honda since they went back to it in 04 right...what do you guys think..mike

Look close, each part number is different. :)

2002 CRF450R - 14110-MEB-670

2003 CRF450R - 14110-MEB-770

2004 CRF450R - 14110-MEN-670

[mikes450r]

ah tricky little honda:devil:

[Sportrax10]

Ok... The main question...

Whats the best year crf cam for MX..!? :confused:

[HP1]

There are many good cams out there. You'll have to decide what sort of power curve best suits your riding style. Then choose a cam that works well with your other mods to get the power curve you want.

I mainly ride XC, not much MX.

I run my 04 CRF cam 2 degrees advanced, with high compression, for a bit more low & mid torque and a lot more top end.

I would think the additional top end of the 04 CRF cam "straight up" would be nice for MX. But, if you are running it with the stock compression you'll lose some bottom end compared to the stock cam. You'll want to think about how tight the MX courses are that you ride. If your MX courses are really tight then advancing the cam will shift the power & torque down in the RPMs a bit.

The 04 has quite a wide torque curve, but if your MX courses are REALLY tight or you are used to burly low end torque (like a 400EX) then you may not like this cam.

Be certian to check your piston to valve clearance before you run advanced or retarded from the stock centerlines.

Just my 2 cents...