National 300ex

[motomxman450]

Building a 300 ex for next season....

Have a full tc motor built
and getting custom axis and jb suspension

any small tricks or tips you guys have? ive seen stuff like 400ex spindals,and stuff

need stuff like bearing carrier little stuff like that any help is appreciated...

[IRISH-RACER-14]

get a shock relocator and long travel 400ex a-arms, will give u more travel

[motomxman450]

thanks got that.... what about 450 brakes?

[IRISH-RACER-14]

i think the 300ex and 450s brakes are equal. rath racing nerfs are the best 4 the 300ex.450r bumpers fit the 300ex also

[motomxman450]

Thanks for the help I got all the big stuff sorted out just looking for smaller stuff for better handeling and brakeing and stuff can I put 450 spindals and hubs on? And for rear brakes what's reccamended and a bearing carrier also???

[XR200R]

i wouldnt use a shock relocator, i would how ever have your shock towers welded and relocated if you want to run 400ex stuff or get the correct 300ex a-arms and shocks, gussed your frame also.

too many people are doing things the cheap unsafe way i am noticing on here.

if you want to use 400ex a-arms and that stuff use banshee shocks so you dont have to use the god awful peice of sheet metal called a shock relocator.

[XBLASTERRACERX]

Hear are some tips me or my friends have used to get better performance out of our 300ex's: 450r front hubs and breaks, 350x air filter, remove the smaller cdi box it was only for reverse and neutrual but talk to tc before doing that one, and a good steering dampener helps alot! What area are u racing in? Hope it helps.

[m0t0xk1d]

Originally posted by XR200R
i wouldnt use a shock relocator, i would how ever have your shock towers welded and relocated if you want to run 400ex stuff or get the correct 300ex a-arms and shocks, gussed your frame also.

too many people are doing things the cheap unsafe way i am noticing on here.

if you want to use 400ex a-arms and that stuff use banshee shocks so you dont have to use the god awful peice of sheet metal called a shock relocator.

are you kidding me? everybody who races the 300 uses the relocator. it is proven. all national 300s use them and they handle all those jumps. its proven and it works. dont let ppl tell you they are not

[motomxman450]

Ha I was going to use that no matter what LOL I mean yea banshee shocks over some custom axis umm no thanks..... Can you use 450 spindals as well?

[XR200R]

correct welds on relocated towers will be stronger in the end. anyone can make a bold on somthing, but correctly joined metal in the end will be better.

[m0t0xk1d]

if it is a real "national" 300 then he cannot weld anything to the frame except for gussets or it will we illegal. so bolt on is what he needs

[IRISH-RACER-14]

u beat me 2 it motoxkid:devil: and isnt having longer shocks with a relo better? dont u get more long travel. and xr200 u are the new smithtank

[IRISH-RACER-14]

oh and u cant use 450 spindles.

[XR200R]

sorry i dont know the rules for all these classes, the guys i run with only build custom frames for MX, guess theres a different then.

no big deal

[m0t0xk1d]

your right, no big deal, and in no way was i rying to be a dick about it, i saw the national title and was was helping him out simply. I didnt want him to build something he then realizes he cant use.

if you use the relocator i would ruse the jb one. looks better and seems to be more durable and easier to use. may cost a little bit more but its worth it.

if your going with long travel suspension have you looked at an evol front end? it may be more worth it. probably cheaper then axis to and you get more adjustabilty.fox = hi/lo compression + rebound $1500 axis = hi/lo compression + rebound = $1800 + .


If you put 400ex a arms and the relocator then you use whatever length shock that those arms run with a 400EX. walsh makes a arms for the 400ex. ive never seen any one use them on a300ex but im sure those would be the best one. other popular 400ex arms are lsr, jb, gibson, laeger, roll design

400ex spindles work but 450r's will not

you could always use a 450r or 250r swingarm however those run linkage systems. that means you need to fab up a thing to accept the linkage but it need to bolt on to the frame and cannot be welded. then you can run any 450r aftermarket shock or any 250r shock. you cannot run a stock 450r cuse the piggy back will hit the airbox.

burgard is also the only company that i am aware of that makes a long travel swingarm.

for tires run the new quadcross pro lites. dropped josh creamers lap times down by two seconds just on a tire swap. they grip amazing and the compound is really good for mx racing.

[XBLASTERRACERX]

Just my opion but to me custom axis is worth the extra money because they truley build the shock from the ground up for u and they have all the upgrades like the x-link system and holeshot system.

Just FYI JB also makes a long travel swingarm

I think the pro likes or razrcross are two best tires on the market.

[m0t0xk1d]

i didnt know that jb did. its not on their website?

[motomxman450]

Lots of stuff here that I knew but some not.

We first wanted to run floats but I called fox and they said they don't make shocks for that setup and people that were were just slapping things together as for a front end we are set on the jb locator and a arms( do I tell them 400 ex or 300 long travle tho???) with 400 spindals and 450 hubs and brakes.... Back end set with a jb swinger as well all that we aren't to sure on is shocks either floats or axis tires will be razr cross fronts with mx rears on dwt rims.

Buying a lsr axle with this come with rear Hubs?? Other stuff is rath nerfs and bumper just need help with a little fine tuning so let me know what you think... All this is appreciated also running custom maier race plastics with a gen-x hood ( does anyone know where to get these there website seems to be gone) also does quad tech make a seat kit? Or atleast a cover?? Thanks..

[m0t0xk1d]

well I know in the class that i race in many people run the jb a arms with the floats. just tell them at fox you need (x)(inches) length to fit a 450r. if they hassle you, say its a custom project that the mounts are the same as a 450r and you need that length.

when you talk to jb just ask them for their long travel arms for the 300. on their website thats all they sell for the 300 any way which is 400ex anyway.

im not sure on the quad tech seat however, just call them and see what they can do.

lsr axle doesnt come with hubs, you can use stock or get theirs

[IRISH-RACER-14]

quad tech do make a seatcover. post some pics of the build

[03sp500]

JB does make a long travel swing arm, its new but it out there.

[motomxman450]

Right now I got nothing. Motor was just sent to a buddy he made a custom gusset kit and Themis painting it white and right now the motor is at tc so I'll post pics when it all comes back.

[XR200R]

Originally posted by m0t0xk1d


burgard is also the only company that i am aware of that makes a long travel swingarm.



HREATV.com will make them

[Arctic Cat Dad]

We run fox evols on the front with houser slicaster a-arms they are so smooth. We have 400ex spindles on the front and 450r brakes and caliber on the rear with a JB Racing plus 2 swinger with a fox podioum X with a HUGE Rezzie on the rear all hooked up to a RPM Dominator 2 axel.

Do the Brake up grade on the rear. The 450r rear brake is a must. The rear pad is so much bigger.It really helps.

Also run a full Looney Tuned Exhaust it's an awesome combo for a built engine. Get an oil cooler it's a must. We run a different cdi box.

Also have Rath Racing Nerfs they are a better nerf for the 300ex.

If you have the money the Houser anti vibe steering stem on ours is really nice.

[born2ride14]

You can use the 450r spindles and front brakes, but use the 04, 05 ones they will handle better. As said through out this thread, get a shock relocator, jb makes a goood one, any 400ex aftermarket a arms will work, st travel a arms will use std 400ex travel shocks and lt a arms will use lt 400ex shocks. If you are good with a welder you can make pro peg mounts for any nerfbars, its not that hard. You can use 88-89 250r swingarm, but a custom shock linkage bolt on mount is required. if you are going to use a 300ex rear end you can use a 450r caliper with the 450r brake stay, I have not done this but i am pretty sure it will work, if it doesnt some minor fabbing will fix that. I also reccomend beefing up the subframe, the tubing honda uses is really small and i tweaked my subframe like 5 inches after a minor crash. I ended up being lucky because my pipe didnt bend nor did my head get cracked. I would attempt this by getting some angle iron cut it to fit and weld it to each side of the square tubing. Get a gell battery that they have for dirt bikes not only are they small comact and light but they also hold up to the beating of mx this video will explain this better than i can

<object width="425" height="344"><param name="movie" value="http://www.youtube.com/v/qVH8ooV4QjA&hl=en_US&fs=1&"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube.com/v/qVH8ooV4QjA&hl=en_US&fs=1&" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="425" height="344"></embed></object>

umm thats all i can think of at the moment

[born2ride14]

Here is the type of battery you should get

http://www.ebattonline.com/BATTERIES.html

[motomxman450]

Did you guys just call fox and say you need a shock for this length??? Can somone post pics especially of the rear with the big rezzie please. And when you measure to get the length of the shock do you have them fully extended???

[m0t0xk1d]

you dont need to measure anything really, if your using 400ex a arms just use the length that the 400ex use with those arms. say your using roll design arms 400ex. a 400ex would use 19.5 inch shocks( i think). a 300ex would also use a 19.5 shock. same with every 400ex a arm and shock

[motomxman450]

Oh ok


Anyone got pics?????

[XBLASTERRACERX]

Pics of what???

[motomxman450]

podium x rear end and floats up front...

also the 450 r rear brake

please thanks...

[Arctic Cat Dad]

If you call Fox and talk to them,they will set you up with what you are going to hook them up to. I don't really know much about the 450r rear brake set up. This quad was built by my friend for his son for the GNCC'S and I bought it . The total cost of this build was $11,600. What a price to pay for a National Championship!:D

[motomxman450]

Got the frame back today it has been blasted and painted white. Along with a custom gusset kit by my buddy .. If anyone wants the kit done email me and I'll hook you up
IMG_0150.JPG

[IRISH-RACER-14]

to upload a pic look for the attach file and click browse

[motomxman450]

Yea ik I tried to do it from an iPod touch I'll have pics up soon.

[motomxman450]

a pic of the gussets

[motomxman450]

bump anyone got pics of the fox front or rear shock.

[shaungray89]

dont waste your time with fox shocks on the 300 either go with a set of pep pb1 from baldwin or sf or go with axis we have axis on both of our 300's the people from axis are great and the shocks are amazing. you can run 06 450 spindles hubs brake etc and on the rear you can switch to an 05 450r rear brake stay caliper rotor locknut and rotor hub. As far as anything else goes ask me and i can tell you i have built plenty of these 300's lol lots of time and money invested