400 vs 300 please read

[badass400ex]

i have built 2 motors for 2 friends one is a 400 and one is a 300 on the 300ex i put in a 11-1 piston and a new valve job (no porting) fmf megamax2 complete system still using stock cam and a 128 main stock pilot and needle is in middle bike runs super strong

the 400ex has a 11-1 piston new valve job (no porting) fmf megamax slip on still using stock cam and a 155 main stock pilot (needs a bigger pilot) needle is in middle bike dont idle the best due to the pilot being small but runs strong as well

when the 2 race the 300 jumps the 400 and it takes the 400 1/4 to 1/2 mile to catch the 300 and pass it would the pilot make this much of a difference or is this how close the 300ex is supposed to be to a 400 with these mods? all 3 of us has taken turns on both quads and same results so it cant be the rider also both quads have stock gearing the 300 it running a 20in tire and the 400 is running 21in mudsharks

is something wrong here other than pilot or is this normal any input would be appreciated

[JOEX]

It's the tires....
The 300 has 22" stock and the 400 has 20" stock.
That affects the FINAL gear ratio.

Joe

[Moded86R]

Wow that's pretty impressive.I am redoing my 300ex right now.Even though so far I only have new tires and a bumper.It still runs so dang good I don't want to tear it apart.

That is encouraging though.

Wow very insperational(sp?)

[Steve-o 400EX]

Something is goin on with that 400, there is no possible way that the 300 should even come close to the 400, even with the different sized tires. Somethin is not right on the 400.

[raptor_02]

i agree. Something is bad wrong with that 400ex. A 400ex should destroy a 300ex in a drag race regardless of what mods each have.

[Moded86R]

Even though I don't want to.I also agree.Something has to be wrong with that 400.

A while back a buddy of mine.Had a cam put in his warrior.And it was way slower than it was before the cam swap.It ran great but was just slow.Come to find out the guy that put the cam in.Put the sprocket on inside out.Don't ask me how this made it slower.I know nothing about warrior motors.But it did.I am not questioning your craftsman ship.But something has to be wrong.

[badass400ex]

i agree with you guys theres no way a 300 should be with a 400 thats why i posted i need opinions on what it could be the timing is dead on spot on both quads i still need to pull a compression test on both

[JOEX]

Switch tires and see how the difference is I bet you'll be surprised. There could be something wrong mechanically, but the difference in tire size is a major factor.

Joe

[BigThumper33]

I don't think a 2 inch tire change is going to change a over 10hp advantage....

[JOEX]

There is actually a 3" tire size difference.;) Possibly a tire weight difference too, he didn't say what kind of tire is on the 300.

To get an accurate performance comparison the gearing should be equaled. (equal difference as compared to stock)

Joe

[CC Rider]

I Know some of you would hope the 300 could some how beat the 400 , but come on just stop with the "tire size" ,"weight" ,and all the other excuses your coming up with, just except what is and not what isn`t !

[toby400ex]

yeah, with the gears the 300 is running, being that the 300 usually uses 22 inch tires that will make it accelerate alot faster, and then the 400ex has bigger tires than stock, and they are big ole honkin mudders, so the 400's acceleration is hurt while the 300's is helped:p

[JOEX]

I really don't give a poop what quad can beat the other. I'm just trying to show some various possibilities to help the situation unlike CC rider:rolleyes:

BTW I own a 400;)

Joe

[JOEX]

Originally posted by toby400ex
yeah, with the gears the 300 is running, being that the 300 usually uses 22 inch tires that will make it accelerate alot faster, and then the 400ex has bigger tires than stock, and they are big ole honkin mudders, so the 400's acceleration is hurt while the 300's is helped:p

EXACTLY!!:macho

Joe

[CC Rider]

The truth hurtin!!!:p

[badass400ex]

not trying to start something guys

the 300 has my factory tires off my rapturd and the 400 has mudsharks like i mentioned i will pull a compression test on the 400 and get a bigger pilot to put in as well and see what we come up with also by the way i forgot to mention that there was also a z400(stock) and results were the same 300 beat it out of the hole and the z caught it and the z vs 400ex the ex would jump it out of the hole and continue to pull it 1/4 mile 6-7 quads thats what has me puzzled the most because that seems to be about right for a slightly modded 400ex to beat the z by

[Moded86R]

Wow it must be a super 300!Sounds like I need to get a 11:1 compression piston and fmf pipe.Imagine what would happen if I got it ported and a cam!I would have to get a longer swingarm!

[ill_lil_romey]

it must be a super 300. But I agree with everyone, Those tires can be the difference. A 21 inch mud shark? Vs raptor stock radials is quite a miss-match. I'm willing to bet those mud sharks are 12 inches wide also. Thats a huge weight difference. also those sharks are probably a 6 ply tire=super heavy.

[Crazy Honda]

A 400 is faster than a 300 by far but if the 400 has a 14 tooth front sprocket the 300 can take them at least I did but he put the stock gearing back on and blew me away:ermm:

[BigThumper33]

A 14 tooth sprocket would only make it accelerate faster.... I don't see how going back to a 15 would make much difference....

[Crazy Honda]

I didn't think it would make that much differance. I thaught something was wrong with his machine but when he put that 15 back on it made a big diff go figure:confused2

[raptor_02]

tire sizes isn't enough to make a noticable difference between a 300 and 400. My 400ex has 18 inches in the rear and 19 inches up front and i destroyed a warrior in top end. Both quads had same mods, Pipe, filters, rejetted, etc. Bottom line that is a super 300 with a hidden NOS button or something. A Z or a 400ex should be destroying it.

[Steve-o 400EX]

Originally posted by raptor_02
tire sizes isn't enough to make a noticable difference between a 300 and 400. My 400ex has 18 inches in the rear and 19 inches up front and i destroyed a warrior in top end. Both quads had same mods, Pipe, filters, rejetted, etc. Bottom line that is a super 300 with a hidden NOS button or something. A Z or a 400ex should be destroying it.

Exactly. This 300ex is still stock bore, correct? If it is, i dont care what tires each one has, the 400 should still waste it. I'm not saying that tires dont make a difference, But the 400 should still most certainly beat the 300 off the line and all the waydown. My best friend has a 300ex with the same mods I do to my 400 and i kill him every time in a race, he hasnt even jumped on me in first gear, Its actually so bad that i can keep the front wheels off the ground all the way to fifth and still beat him by a mile. I'm just sayin somethin is wrong besides tires, but to find out for sure, switch the tires on the 300 and 400 just to find out.