440 kit

[400EXracer74]

do i need a new carb or to run race gas when i get a 440 kit

[R3Concepts]

In my troubles with my old 440, its not worth it, build a 416 or a 426 like I have now. BUT if your stuck on a 440 then to make it really shine, your gonna have to do a cam, springs, valve work, head port and polish, carb, full exhaust, rev box, those kinds of things. With 440s its all or none. And yes you are going to have to run race gas with a 440 motor, I ran 110 in mine.

[400EXracer74]

what has to be done with a 416 or a 426 kit? and i want something thats not too difficult to install cuz i want to install. i just want more power so i have a better chance against those 250s i gotta work hard to beat those in the races

[TCracin440ex]

thats bull shyt what he said...my friend has a 440ex and aint had a minutes problem outta it...he got the bore kit for 200 bux, and the stage 2 hotcams for 129....had it installed for 300 dollars....hes still running a stock rejetted carb, stock sprocket ratio, so on and so on


the fcr 39mm carb helps out alot but its not needed
you dont need to run race gas he has a 12.5:1 ratio and runs 93 octane and ocasionally race gas
a rev box would help but its not needed....rev box is 119 bux....and a aftermarket exhaust is about all you will need to make a 440ex work for you

[R3Concepts]

TC440
This is MOSGOTSAND. And thats cool that your freind didnt have 440 problems. If you get the right guy to do it you may not have problems. BUT it is really easy to screw a 440 up, especailly if you race it, the motor heats up bad and it starts to pull the studs out, mine did it, and about 30 other kids in AZ did it. Look around the forums, everyone says they have head gasket problems. Build a 416 or a 426 and have a relaible bike. All the extras over the bore kit arent needed like TC440 said, but i doubt youll be holeshoting any races if you dont add that stuff. JMO For the 416 or a 426 you dont need to resleeve the cylinder which is another reason 440s blow head gaskets. TC440 I dont know how old your freinds 440 is but with a 12.5:1 compression hes bound to have problems.The only 12.5s ive seen are Sparks motors and there on alky.

[TCracin440ex]

o0o...whats up bro....yea i kno hes gonnna have problems with that 12.5:1 because simple reason that stock rod aint gonna hold up....he plans on mx'n with the bike but im not sure...for the money he paid for the 440ex kit, stage 2 hot cam, and 350 for legacy atv to bore and install the new sleeve and re assemble the motor i coulda got a professionaly build TC nationa 416ex or 426 ex for about that price and still eat his *** up....

219.95 for the kit
129.95 for the cam
350 for the installation and reassmble that wasnt including the 3 week waiting period and mechanic fees from the local shop that rebuild the motor

the mechanic fees, and the damn storage fees

see what he did was he took it to a local shop....they dont have a bore machine so they shipped the jug and the shyt off to legacy atv in NC...they installed the sleeve and bored the cylinder....took them 3 weeks to get every thing back togethere and for him toget his bike right....its 25.00 per day your bike stays in the shop here, its like 45 dollars an hour your bike is being worked on.....so the 350.00 coverd the bore and sleeve installation

[400EXracer74]

whats TC national and how much is it for a professionally built 426?

[Paul400ex2002]

Originally posted by TCracin440ex

you dont need to run race gas he has a 12.5:1 ratio and runs 93 octane and ocasionally race gas


OK now THAT is bullshyt, there is NO way you are running a 12.5:1 compression piston without race gas, or at least a 50/50 mix of race gas and premium, it's just not going to happen. The stock motor is like 9.6:1 compression, so jumping almost 1/3 in compression is going to make a HUGE difference. That bike would've blown up a long time ago if it was truely 12.5:1 compression.

[frogburner]

I will have a 440 in progress a little later this summer... I have the 12.5:1 piston from wiseco, but it doesnt look like 12.5:1 though,, The Carillo Rod I ordered should be in this week,, I am getting a heavy duty timing chain, Black diamond valves with a 1mm overbore on intake side, new springs, I already have a stage 2 Hotcam and Yoshi pipes,, the head will be polished, and I will pick up either a 39 or 41 FCR--havent decided which one yet... I know the motor will run a little warm, but thats fine to me,, I am very curious how they run,,, Right now I run 114 Citgo with my 406 11:1,, but decided to go big,, so 440 for me,, a little leerie about a rev box, I dont need to injure any engine parts to soon, the way I see it...

[R3Concepts]

If you already have a Qwiksilver carb why would you go to a keihin fcr? Just send the edelbrock back to them and hae chris silva do the eichner series changes to it. He cleans it, bores it to a 38x38 and puts the big 23 needle in it. All for 50 bux. Hell of alot cheaper then buying a fcr.

[TCracin440ex]

dude paul400ex2002.....i kno wtf he runs....it aint gonna "fugg his bike up" it just makes it run like shyt....now me on the other hand i run straight cam 2 (110 octane) in my 400ex...no mix no nothin...u aint gotta run race gas with his 440ex kit...sometimes he will run a splash of cam 2 in his 440ex but he doesnt run it all the time...most of the time its str8 93 octane....only thing it does is make the motor burn cleaner...

[frogburner]

Originally posted by R3Concepts426ex
If you already have a Qwiksilver carb why would you go to a keihin fcr? Just send the edelbrock back to them and hae chris silva do the eichner series changes to it. He cleans it, bores it to a 38x38 and puts the big 23 needle in it. All for 50 bux. Hell of alot cheaper then buying a fcr.




Well my Accelerator pump slide is broke, and either way that carb is a very stiff throttle carb,, My buddy has a 39 and its real smooth, but if that guy your talking about, could fix the silver, I may have to send it in,, it would save me a little maybe..

[R3Concepts]

My slide assembly broke also so I sent it to Chris and they fixed it for free. Hes probably one of the smartest guys to talk to, hes the customer service guy for Edelbrock and you can tell him what is done to your bike and he can get you spot on for perfect settings.

[Paul400ex2002]

wow you truely are ignorant. I will say this again, there is NO way he is running 12.5:1 compression without race gas. That much compression will cause pinging/detonation without higher octane fuel, I guarantee it. If you don't believe me, call up sparks, or rudy @ dfr (480)664-9860, and ask him. I had a 12.5:1 416 in my 400ex, and I had to run race gas, or else it would ping. You can tell me I'm wrong and you know everything all you want, but I guarantee you there is no way in heck he is running true 12.5:1 compression without race gas, or a 50/50 mix.

Let me give you a refresher course on engines here. This is kind of a simple version, done so you can understand it. Any time you raise compression on a motor by that large of a percentage, you are going to have to increase the octane of the fuel you are running. The reason for this is that as you increase compression, you are increasing the amount the air/fuel mixture is compressed during the compression stroke, and the more it is compressed, the more heat is generated. Now if you weren't running high enough octane on a high compression motor, here's what would happen: As the piston travels upwards during the compression stroke, the air/fuel mixture is compressed. The lower octane fuel you are running can't handle the raised compression correctly, so it preignites, detonates, or whatever you want to call this. The reason for this is that the air/fuel mixture exploded before the piston reached the top of the compression stroke, and instead of a nice clean burn that you would get with higher octane fuel, you get nice detonation and pinging.

Somebody else with a more thorough knowledge of the exact working of a motor and the combustion process can probably define this better than i have, but you should get the idea.

[R3Concepts]

Paul, TC440 just got done saying that his freinds bike doesnt run all that well on 93 octane gas, BUT you do not have to run high octane gas if you dont want to, its not gonna perform all that well but yet IT WILL RUN.

[cals400ex]

i don't know much on the wiseco 12.5:1 kits, but their 11:1 pistons are well less than 10:1 true compression. it is possible that the 12.5:1 could be around 11:1, i really don't know. i don't see how a 12.5:1 true compression would run worth a crap without some race gas. sparks said they would never run more than a true 10.5:1 on 93 octane in a 400ex. however,i think you can go a little higher than that on pump fuel. however, you may sacrafice a little bit of power and may produce a tad bit more heat.

[TCracin440ex]

paul400ex2002....if you would have read above as i said...when my friend runs 93 in his bike it runs like shyt....the same case with me when i run 93 in my bike it runs like shyt too....ive ran 110 octane in my 400ex ever since ive had the thing from day 1....the very first tank of gas was from the dealer which was 93 after i burnt that 93, i changed the oil, plug, and oil filter and filled it up with 110 octane....when i run reg. gas in my 400ex it doesnt run right...so i kno that if he runs 93 in his bike that it doesnt run right...and just a lil heads up...if your htinking about getting a 440ex wiseco kit get a 440ex with the 11:1 ratio u can run pump gas on that 11:1 ratio and wont hurt a thing...also with a 12.5:1 ratio that stock rod wont hold up long...id take a professional build 416ex over a wiseco 440ex anyday

[frogburner]

Originally posted by R3Concepts426ex
My slide assembly broke also so I sent it to Chris and they fixed it for free. Hes probably one of the smartest guys to talk to, hes the customer service guy for Edelbrock and you can tell him what is done to your bike and he can get you spot on for perfect settings.


How long did it take you all together to ship it and recieve it again?? Is the throttle on yours stiff with the silver?? where do I ship it to anyway,, I will probably do that if it will save me a little money..I liked the silver it had excellent response, but, the dang throttle was so freakin stiff, it hurt to go ride..

[R3Concepts]

The Edelbrock MC divison is on Cali. and it only took me a week to get it back. Open up the throttle housing and spray WD40 down the cable and itll loosen up super quick. Mine is softer then a stock bike now.

[frogburner]

Originally posted by R3Concepts426ex
The Edelbrock MC divison is on Cali. and it only took me a week to get it back. Open up the throttle housing and spray WD40 down the cable and itll loosen up super quick. Mine is softer then a stock bike now.


Do you have a number I could call??

[R3Concepts]

The tech line is 887.888.7504, then I think its ext. 2, then ask to talk to Chris Silva and he can tell you everything you want to know.