Its time for more power!!!

[Baley69]

I'm ready to tear into my first new quad:huh At first I wanted to keep it stock forever, but I'm ready for a bigger bore, and it seems like there are many different combo's. I need some solid opinions on comp, bore, brands, carb, cam, what to port, ect...... the only thing I'm kinda sure of is I want a 416 over a 440 for reliability reasons, but correct me if I'm wrong. I only trail ride and ride at the dunes, any help would be greatly appriciated:D

[440exnacsracer]

bore it to a 440 w/ a JE piston- wiseco sucks. get a hotcam stage 2 and get it ported for top end cause the 440 kit adds loads of bottom end then get a yoshimura full system, then get a 39mmfcr carb and k&n filter. dont buy a 440 kit, buy the parts individually, youll get them cheaper (piston, sleeve, gaskets) lata

get the 416 kit, get 11:1 compression wiseco(im not seeing how they suck) get a hot cam stage 2 high lift short duration, porting for bottem and midrange, get the heavy duty valve springs for reliability reasons, thenif you want more top end, you gear it higher, if you get the port job for topend, you wont feel much of a differnce because your can only go as fast your engine will rev, and taller gear lets it rev longer, engine work jus adds power and helps you get their faster, to increase topspeed, get taller gears, but make sure your engine can handle the taller gear, dont make it to tall, or you loose all bottem, i recomend gettin a sprocket kit, 15 in the fron, 36 in the rear, tis what i run and it works damn good

[Maryland 400EX]

Save yourself all the headaches of tearing apart your motor for now. Before you go with the piston, let your motor breathe. Get a Keihin 39MM Carb and a Sparks X-6 pipe. You'll see BIG gains.

[Baley69]

Right now I have a jet kit, k&n, removed lid, yoshi pipe and I got whooped by 2 other 400's. There was a 416 and a 440, and it seemed as if the 416 beat the 440 in flat races but the 440 took it racing up dunes.

[Maryland 400EX]

Yea, I'm sure they have ported heads if they have piston kits so you're at a serious disadvantage. Your pipe isn't the greatest either. Just a piston kit by itself isn't going to do much for kicking major butt without porting, cams and a carb. Get the FCR39mm carb since you have a pipe. It'll work wonders.

[RAPTORAZ]

Originally posted by Maryland 400EX
Yea, I'm sure they have ported heads if they have piston kits so you're at a serious disadvantage. Your pipe isn't the greatest either. Just a piston kit by itself isn't going to do much for kicking major butt without porting, cams and a carb. Get the FCR39mm carb since you have a pipe. It'll work wonders.

If you read some of the Mickey Dunlop stuff on this website, he states porting doesn't do much for a 416 or lower cc engine. My head is not ported. All I have is a piston and cam. And mine destroys piped only EX's and Z400's. From what I've seen, Baley69 is correct. Similarly modded 416's are quicker on the flats (probably due to lower piston weight, which makes them rev faster), but 440's have more torque and pull the hills better.

[FatBoy Redrider]

My buddy and I both ran 440 kits and neither of us would ever do it again. Go with the 416 kit. It is much more reliable and runs much cooler. A cam makes a world of difference as well but replace your springs and rockers or you will tearing it down to replace them in a few months. I don't care what anyone says, pipes don;t give a 400ex that much more power. I would definelty run an aftermarket silencer, but the stock headpipe flows great. I agree with the other post that porting is a waste of money on this machine. If you want more power and reliability, have someone like TC racing bore it to 416 and then stroke it to create a 440. Stroking seems to keep the reliability. It also creates a different powerband. Just my 2 $

[Baley69]

Ya, I just want to do it all at once. Any one else have good combo's?

[lilpoppy]

im thinking of getting a sparks x-6 and a FCR39mm carb pretty soon but i am planning on installing a 416 kit in a couple months too. Is this gonna be the best carb for the 416 kit or should i hold off on buying a carb until i bore? What is the difference between the 41 FCR nad the 39 FCR?

i thin the 41FCR dleivers a lot more boost and hp, it costs a lot more tho, i would say that its the best bang for your buck with a new carb

[lilpoppy]

on the sparks web site it says they are selling the 39 for 450 and the 41 for 475. That isn't a big price difference at all.

[Dave400ex]

First I suggest you get a Full Pipe. The Sparks is an awesome Pipe. Also I would get a Foam filter too, I think they protect better then the K&N's.
Sparks X-6 $489
Sparks 39MM FCR Carb $450
JE 416 Piston in 11:1 or lower Compression $115-$150
Sparks Racing Camshaft $209
Sparks Valve Springs $110
Sparks Harden Rockers $200
Heavy Duty Cam Chain $100
Sparks 8 Plate Clutch Kit $139
If you have the Money you could get a Higher Compression Piston, but then I would get the heavy duty Connecting Rod ($239). You could also have Head Work done ($375). The last thing would be a Hinson Clutch Basket ($225). Sounds good to me..... :p

[440exnacsracer]

the reason i dont like wiseco is they dont last as long and there compression ratios arent on. an (11:1) wiseco has less compression than stock and a JE is measured right

[AndrewRRR]

Originally posted by WarriorMan
First I suggest you get a Full Pipe. The Sparks is an awesome Pipe. Also I would get a Foam filter too, I think they protect better then the K&N's.
Sparks X-6 $489
Sparks 39MM FCR Carb $450
JE 416 Piston in 11:1 or lower Compression $115-$150
Sparks Racing Camshaft $209
Sparks Valve Springs $110
Sparks Harden Rockers $200
Heavy Duty Cam Chain $100
Sparks 8 Plate Clutch Kit $139
If you have the Money you could get a Higher Compression Piston, but then I would get the heavy duty Connecting Rod ($239). You could also have Head Work done ($375). The last thing would be a Hinson Clutch Basket ($225). Sounds good to me..... :p

Hey that's only $2686 before gaskets, bearings, seals and labor! LOL. Oh well, speed costs money. It's times like this I'm glad I own a 2 stroke, although If I raced MX seriously I'd probably think different. LRD can put you together a 48hp (MX- LOTSA bottom end) 440 for about $2000, Sparks and TC probably build nice motors for similar fees.

[Dave400ex]

Yeah I would go with TC. He is much cheaper then Sparks....

[Foxrage]

I think thats the first post in the powertrain without having TC in it warriorman. Just her you a drop in cam, 416 piston and valve seals, and if you have more a carb.

[haydug]

try FDO racing in Ohio. 740-967-1078. He makes the fastest and most reliable 400ex's out there. I have a 493cc kit that is over a year old with no trouble at all. He also has 463cc kit and is in the process of 450cc kit now. He also has oil coolers and air boxes.

[lilpoppy]

what state is TC in?

[Dave400ex]

TC is in Warren Penn. Have any pictures of the FDO Oil Coolers?

[haydug]

try GT thunder's web site, they show a dyno of FDO's motor, is makes the most HP out there right now, it is super strong. The 463cc kit will out pull a yzf 440 quad. I prefer Nykasil lining on the cylinder and also the heavy timing chain. Mike(FDO Racing) likes the Sparks x-6 pipe and 41mm carb. If you are serious about your motor and want it to last you should at least call him. 740-967-1078

[Baley69]

Either way, I'm going to have 2 grand in a well built more reliable motor because of how much the exhaust and carb is. So I'm just going to get the carb and pipe now, then move on to the engine after my ### heals from spending 1000$ on two items:D

[lilpoppy]

Thats exactily what I'm planning on doing.

[max400EX]

Originally posted by FatBoy Redrider
I don't care what anyone says, pipes don;t give a 400ex that much more power. I would definelty run an aftermarket silencer, but the stock headpipe flows great.

Someone obviousely hasn't bolted up a good race exhaust to a stock motored bike. Look at my mods in my sig. I guarentee you my 400 is a world of difference over a stock 400.

[Dave400ex]

Actually a new header doesn't make that much of a difference until you get some motor work done. If you bore it to a 440+ then a new headpipe might be a good idea. Heck Chad runs a stock headpipe on his 505ex.

[haydug]

Hey guys, here is FDO's oil cooler on my bike. It works really good and looks good to. 740-967-1078.

[Dave400ex]

Oh ok it's an oil tank. I thought it was something like the FST cooler. Do you have a picture of your whole quad? It looks sweet.

[ChadEXer]

Thats looks exactly like a Pingry oil tank to me!!!

A new header on a 400EX isnt going to help anybody,,,,The only thing a aftermarket header is good for is a tad more top end on a well built bike,,,,all sumed up, its a waste of money!! I dont care what anybody says,,,,"oh mine is so much faster since i put a header on it",,,thats BS,,,,BS i said!!!

the site store has oil tanks for $200...wow

PS..the FMF powerbong added more power to my stock motor..:blah I had to change jetting around so I know it added more power..:devil

[haydug]

If you look at cooling tubes on this tank, you will see that they are larger than the pingry tank. It also has a place on top of tank to put a thermo. guage. These are 209.00. 740-967-1078

[phatswinn]

dam it why cant the 300ex have a dry sump oil tank!!

[papaw]

don't forget to throw reliability out the window.it doesn't matter who builds it,keep it maintained....