i need your opinion 400ex riders

[serpent]

in a few months i starting modified my 400ex engine first i buy a je piston ,10.6:1 = 406cc , edelbrock quicksilver carb,hotcams stage 1 and hinson clutch basket and a little port job intake a exhaust i need your expirience opinion about that ..

Sounds like a good setup to me...:cool:

[Doibugu2]

have you upgraded your suspension yet?

[RAPTORAZ]

Originally posted by serpent
in a few months i starting modified my 400ex engine first i buy a je piston ,10.6:1 = 406cc , edelbrock quicksilver carb,hotcams stage 1 and hinson clutch basket and a little port job intake a exhaust i need your expirience opinion about that ..


Without the use of a more radical camshaft, the porting is probably unnecessary.

[serpent]

not yet the suspension is stock and a think porting because a put a racing cam and carb a think they need more air flow in the engine they have a yoshimura exhaust titanium head pipe and trioval spark

[Quadzilla]

I tell ya, I would take that porting money and put every dime towards suspension. The porting will help a little but will be hardly noticible. The suspension on the other hand is night and day. I bought my front shocks off of Ebay for $370 and got the rear revalved from DeRisi Racing for $175 and WOW what a difference!!!! Do that, trust me.

[serpent]

well the suspension is my next step first i think in the engine develop you have a point in the suspension i like the trailriding
and and need update my susp,, but i have to smoke some quad in mi area first :devil:jajaja

[JDiablo]

well the engine work won't do you really any good without some suspension...you can only go as fast as your suspension allows...i would get some burgard a-arms and some works shocks if your on a budget and then the motor work....and o yea,welcome to the site;)

[RAPTORAZ]

Originally posted by serpent
i have to smoke some quad in mi area first :devil:jajaja


You'd be better off with a Stage II Hotcam then. The gains over a stock cam with the Stage I will be minimal. What are you racing?

[serpent]

thanks all of you for yours opinions i visit the site every day this is my first post ,in these day i post some photos of my quad

[serpent]

some trail riding and woods ,raptoraz

[Goat397]

if your riding trails then dont listen to him , go with the stage I (much better low end power)

[serpent]

i think about that i dont want my engine super'' modified and dont want broked i little more power than stock is my goal and then tha suspension

[zephead400ex]

Originally posted by Goat397
if your riding trails then dont listen to him , go with the stage I (much better low end power)

[hawiianpwr]

I agree with with everybody go with the suspension first. I also do alot of trail riding. Its the best descison I made was going with the suspension first. If you think about it you could have the sickest motor about there but if you can't control it what good is it.

If you must do motor work first. I just put a 416 in mine from C&D similar to what you want to do. I got the ROSS racing 10.8-1 piston, thinner gasket, Hotcam 2 cam, and I'm running an Edelbrock carb, MSD ignition and a Hetrick pipe. Its a damn good setup for everything. I thought I was going to lose alot of lowend. I'm pretty light around 145lbs so that kinda helps but I didn't lose any lowend and gained a ton more from mid to topend.

[04'400ex'er]

First off, Why not go with the 416? All it would cost more is a little on the boring side. And it will kill the 406. If you ride trails and want a lot of bottom to lug around with, Go with the stage 1. If you want to make power in the higher RPM's, go with the stage2. About the porting not helping on the stage1, I dunno about that.:huh And If you don't race and just ride in the weekends with your friends, then do the motor before the suspension. Otherwise, I dont know. If you have $1500 worth suspension and a stock 400ex motor, You ain't gonna beat anyone.:rolleyes:

[Jingle #11]

Originally posted by 04'400ex'er
, I dont know. If you have $1500 worth suspension and a stock 400ex motor, You ain't gonna beat anyone.:rolleyes:

unless they have a stock 400ex or up to 1400 in suspension :blah:

[04'400ex'er]

Originally posted by Jingle #11
unless they have a stock 400ex or up to 1400 in suspension :blah: :huh :huh :huh

Now how many of those will we see on the track?

[serpent]

yep i only ride in the weekends. i like that 416 boring side i just thinking about that
.and the engine heat increase right? how i said before i dont want a broke engine whith all this mods i just see that ross pistons is for the xr 400 is the same engine ? what about the cam in this engine i heard some people put the cam in his quad and you have a point, 04,400ex'er about the susp, right now i dont need in the future maybe.

[04'400ex'er]

Originally posted by serpent
yep i only ride in the weekends. i like that 416 boring side i just thinking about that
.and the engine heat increase right? how i said before i dont want a broke engine whith all this mods i just see that ross pistons is for the xr 400 is the same engine ? what about the cam in this engine i heard some people put the cam in his quad and you have a point, 04,400ex'er about the susp, right now i dont need in the future maybe. I Ride trails on my property every day, And my motor will come first.Then comes the PEPs. I would do a 416 Sparks national kit. That would eat alot of 440's and new 450's. If that is too high for your budjet, Buy a JE 10.8:1 piston in 416. Go with a hotcams stage 2 or a web cam. I would reccomend a FCR39mm carb too. The motor might run a little hotter, but not alot. You can also run this off pump gas. Put some air scoops on and should help with the airflow. That would give you a great setup.

[serpent]

is my second option that piston je.10.8:1 but the cams i read whit the stage 2 i will need to change the rockers arms and the air scoops i ordered at ebay is these days

[Quadzilla]

The Ross piston is the same as the JE with a few minor improvements and you can order a light but stronger pin for it for quicker reving. The optional pin is made of tool steel vs convensional steel.

The reason that the Ross is the same as the JE with a few improvements is that the chief motorcycle piston engineer at JE left JE and went to Ross. He essentially took his original design and improved it a little and that is what Ross is selling. I have spoken to him many times (his name is Jim) and he supports the pistons as well (when you call them for questions, Jim is who you talk to).

The Ross compression ratio is rated using XR gaskets (thinner than EX gaskets). If you use EX gaskets with the Ross piston, you will get a lower comp ratio. THe XR and EX pistons are identical, it's only the gaskets that are different. I'd go with the Ross if I were you...

[Quadzilla]

With a Hotcams, you will not need to order rockers or harden them. Hotcams are a "drop in" cam and do not require this....

[serpent]

quadzilla you spoke about stage 1 cam ,and is new for my this thing about the head gasket is safe this change? pardon'me for this questions because i need stay sure' and aim very you now!! i went to the ross page for more info

[livealatimmy]

I personally think you should do the 416 kit. I have the Sparks agressive Drop In cam and love it . I had a friend who had an high comp std bore piston and a hot cam stage 2 and i could out run him when i only had the Sparks cam and X6 exhaust.

[04'400ex'er]

Hot cams are drop in cams. Shouldnt need hardened rockers. What he said about ross. You will be fine with the ex or xr gaskets.

[serpent]

ok i follow your advice 400ex'er i think order the ross piston 416 i read another thread about that pistons a i convenced 416 is on the way jaja and stage 1 cam

[serpent]

quadzilla and 400ex'er what carb you use, stock?

[04'400ex'er]

Originally posted by serpent
quadzilla and 400ex'er what carb you use, stock? Stock right now but when i do a 416 ill use a 39mmFCR. Do a search on that.;)

[serpent]

ok thanks for your atention 39mmfcr
this is a flatside carb no?

[04'400ex'er]

Originally posted by serpent
ok thanks for your atention 39mmfcr
this is a flatside carb no? I think so??? It's a good'en

[Quadzilla]

Yes, it's a flatside. 39mm is good, the newer generation FCR is better (40mm). The 41mm is too big for your mods....