stage 3 hotcam with stock piston & bore?

[07honda400ex]

Ok heres the deal i bought a hot cam off ebay used and I thought it was a old stage 2 but when I got It It was a stage 3? I dont have a big bore kit or a hi comp. piston only a hmf slipon, 170 main 42 pilot ,procom rev box, 450 timing chain! I put the cam in and it fired right up sounds good but didnt test ride it yet? am I gonna hurt anything running the stage 3?

[Thumpin440ex]

Sell it and get a 1 or 2. The stg 3 likes a over bore and more compression. Not going to hurt anything running it, but might not perform as well as the other 2.

John

[tri5ron]

Originally posted by Thumpin440ex
Sell it and get a 1 or 2. The stg 3 likes a over bore and more compression. Not going to hurt anything running it, but might not perform as well as the other 2.

John
yep,... what Thumpin said.

[07honda400ex]

well that sucks! I'm a very aggressive rider always wot not to worried about the bottom end I need as much top end as possible? I'm was just worried about ruining something in the motor with the stage 3 cam? I was always hitting the rev limit with the stock cdi so this cam might work pretty good for me?

[tri5ron]

the cam, (or ANY cam) has nothing to do with the Rev limiter.
and before you even ask,...
NO, aftermarket rev-limiters do not work well on a 400EX.
The 400EX makes all of it's USEABLE power, Well below the stock limiter.

If you keep banging off of the limiter, you are revving your engine too high, and you need to shift sooner.
If you are bouncing off the rev limiter in top gear, you either need to change your gearing, or get a different quad.

A 400EX is not the "Baddest Boy in Town", and if you try to ride it like it is,...
... you are going to be spending as much cash REPAIRING IT, as you would, buying a faster, more powerful machine.

JMHO

[quadmanw]

I disagree.. I had a white bros rev limiter and it made a big difference.. now ill be running a Sparks limiter.. In the woods... the 400ex is the baddest in town. theyre geared perfect and if you set em up right for XC and know how to ride then you can beat the piss out of em

[ish416]

In the woods... the 400ex is the baddest in town.

Must be a small ill-informed town.

[quadmanw]

I'm from a small hick town but I race everywhere.. I beat 450s in the woods all the time. no big deal. on a drag or mx track.. I wouldnt even keep up

[TheAwesomehonda]

From what i've seen and heard mostly from the hot cam site your stock rocker arms and valves may get ruined by the stage 3 cam but i'm not sure.

[Thumpin440ex]

A ex that is set up rite, with a good rider, will def be on or all over a 450. As for the valves and rockers getting messed up, not the case. The hot cams is one of the only cams that you can run STOCK valve train with. Again you can be a balls to the wall rider, but the 3 cam in your current configuration is not going to be as fast as a 1 or 2. If you want top end, sell that cam, put a stg1 in and gear it up.


John

[powerbomb400]

I have a stage 2 HotCam and the power delivery is great. If you are hitting the after market rev limited I've changed gears and letting the 400 ex shine cause of its low to mid-range torque pulling thru a higher gear.:)

[07honda400ex]

what if I just upgrade to a je 12:1 piston? will I be alright then? and I was thinking about the sparks timing key for now just to gain my bottom end back since u can only run it with a stock piston?

[dxcody]

12:1 is race gas on these machines. Air cooled motors cant run as high of compression on pump gas as liquid cooled engines can.

You can run a 10:1 with the sparks key and be fine, your just not reccomended to runs a sparks key with high compression pistons 11:1 and over unless you run 100+ octane and even then its not reccomended.

I am going to have to agree with ron on this one, a 400ex is not the top dog. stock for stock, with an identical rider on each machine, a 450 will blow the 400ex out of the water.

Better suspension, way more torque and alot more overall power.

Put a guy that has been riding a 400ex all his life on a 6 mile XC track, let him run it a few times on his 400ex, then throw him on a 450R and let him run it a few times.

Which one will he be faster on?
You got it.. 450R

[trxPOWER]

Shoot, with that huge cam i dont think you would have a problem running 12 to 1 on pump gas! just put in a regular 400ex width head gasket and that should put you right around 11 to 1 compression. Dynamic compression vs static compression!

[CJM]

Originally posted by trxPOWER
Shoot, with that huge cam i dont think you would have a problem running 12 to 1 on pump gas! just put in a regular 400ex width head gasket and that should put you right around 11 to 1 compression. Dynamic compression vs static compression!

This is very true, but there is the off chance that he may run into detonation problems and need race gas.