400ex MX mods

[jesseweaver]

what kind of mods wouold be good for my ex? im planning on getting a 450 in the next 2 years or so, so i dont want to spend 1000 on aarms that wont fit a 450r. what im saying really is what can i do to my 400ex to make it better for mx racing, but can use the parts on a 450r in the future.

[gcart2]

lol nothing really. get lots of seat timem on the track and get fast.

[XXXRACER165]

He could go 440cc

[jesseweaver]

what about a new axle (or wheel spacers) or new rims and smaller tires?

[XXXRACER165]

Smaller tires just make it harsher

[oleboy87]

put a pipe and filter on it... and just ride the s**t out of it...

Originally posted by oleboy87
put a pipe and filter on it... and just ride the s**t out of it...

He's got the right idea, all the 400ex needs to be waken up is an HMF slip on, better flowing airfilter and jets.

[oleboy87]

yes sir... jsut gotta get that seat time...

[jesseweaver]

i already have a white brothere e series full pipe and a K&N filter, the rest of my mods are in my sig.

[jrwisehart]

Get some 450r shocks off ebay. For MX that will be your best investment for your money. The first time you go of a 30 foot table top you will see how bad stock shocks suck. And as far as the engine goes X2 on getting a slip-on, air filter, and jets.

he has works tripple rates

[f150mann]

wheels/tires, sprockets, handguards, and a nice set of bars. most can transfer to the new bike, and very helpful in mx

[Ruby Soho]

you might want a 14t front sprocket. the bottom end comes in hand in those tight corners.

[jesseweaver]

i was planning on getting new sprockets and a new chain soon, but i dont know to much about what to get. what is the best brand and how big should i go? also is it hard to put them on, you dont have to take the rear axle out do you?

[f150mann]

its very easy to do. and contrary to what people will tell you. you dont need expensive sprockets, and you definetly dont need an expensive o ring chain.

i run 15$ sprockets and a 25$ chain. i replace them at MOST once a year... could easily get 2 years or more out of them.

if you really want mx a 13 front and 35 rear will be good, but most go with a 14 front and 35 rear. i have the 14 and enjoy it because i like top end too. 13 is more bottom end.

[KingpinsEx]

If your planning on upgrading to a 450r in the near future, i would not waste much money on the ex. Hardly anything you put on it will help the resale value, so it's somewhat a lost cause. For the minor performance gains for most cheap mods its hardly worth it. With the excepetion of wheels, tires, bars, as said and maybe a steering stabilizer?

I would not waste the money on motor mods if you plan on selling it. Best thing to do is spend as minimal as possible and just save that to get a 450 sooner. Still race the ex though, the experience will defeintely help out when you get a 450 and it will just make it seem all that much better!

Also when i raced mx i dropped the countershaft sprocket a tooth and it really helped with the bottom end powering around the track. About as cheap a mod as you can do with major benefits. You don't need to replace both sprockets unless they are wornout. Simply changing the front will do just fine..