Extended 400 a-arms on 300?

[Tread70]

Has anyone ever put extended A-arms from a 400ex on a 300ex? Say like some +1 +2 arms, would it be any worse or better than someone putting on standard 400ex A-arms? I am not thinking of this but used 400 arms are more available than used 300 arms and was just very curious if this could work or not.

Tread

[bradley300]

you'll be much better off with 300ex a-arms, 400arms have a lot of problems on 300ex's. do a search and you wll see my post

[Tread70]

I have seen threads about stock 400's on 300's but never extended or LT 400 arms on a 300.

Tread

[TheFontMaster]

+2 400ex a arms on a 300ex would be like +4 300ex a arms. As long as u have the mounting bracket for the shocks and 40 ex shocks I dont think it would be a problem. You would have one wide front end though:blah:

[Snow]

Originally posted by TheFontMaster
+2 400ex a arms on a 300ex would be like +4 300ex a arms. As long as u have the mounting bracket for the shocks and 40 ex shocks I dont think it would be a problem. You would have one wide front end though:blah:


yeah with that front end setup you would want a 250r swinger with the cr500 linkage and a +4 250r axle to even the ends out...would be one of the sickest 300ex setups ever :devil: :bandit:

[Tread70]

Any links on the 250r conversion with cr500 linkage?

[TheFontMaster]

Originally posted by Tread70
Any links on the 250r conversion with cr500 linkage?

Ummm I think he was making a joke about the 250r and the cr 500 linkage.

[roostin_dale]

Originally posted by TheFontMaster
+2 400ex a arms on a 300ex would be like +4 300ex a arms.

I have this setup (400ex +2's)....Its 49" wide with my 3+2 offset hipers...

[Snow]

Originally posted by TheFontMaster
Ummm I think he was making a joke about the 250r and the cr 500 linkage.

nope, it has been done many times, however i dont have a link or any pics. but when its done it adds about 2 inches to the back and all that needs to be done is: you have to weld two little tabs for the linkage onto the frame. If you give me some time im sure i could dig some pics up for ya :)

[roostin_dale]

Originally posted by nacsracer250r
nope, it has been done many times, however i dont have a link or any pics. but when its done it adds about 2 inches to the back and all that needs to be done is: you have to weld two little tabs for the linkage onto the frame. If you give me some time im sure i could dig some pics up for ya :)

i would like to see it...

[Tread70]

I could do this...... Pics would help but this shouldn't be too hard. A friend and I add a '00 ZX6 swingarm to an '86 zx900. Is the 250r axle wider stock vs. stock than the 300?

Tread

[bradley300]

Originally posted by TheFontMaster
+2 400ex a arms on a 300ex would be like +4 300ex a arms. As long as u have the mounting bracket for the shocks and 40 ex shocks I dont think it would be a problem. You would have one wide front end though:blah:

all except for the bumpsteer and twichy steering:eek:

[TheFontMaster]

Originally posted by roostin_dale
i would like to see it...

Me too.:macho

[Toadz400]

Someone I know has 400ex +2 a-arms on his 300ex and had the shocks special made from Works to work with it. Supposedly it works just fine.

[roostin_dale]

Originally posted by Toadz400
Someone I know has 400ex +2 a-arms on his 300ex and had the shocks special made from Works to work with it. Supposedly it works just fine.

Here is mine...400ex +2 arms and tie rods, 400ex spindles, and custom shocks by TCS (14.75 eye to eye)....

[Tread70]

Sweet, what you got in the back to even out or is the rear still stock width?

Tread

[roostin_dale]

Originally posted by Tread70
Sweet, what you got in the back to even out or is the rear still stock width?

Tread

The rear end is a Burgard +2 swingarm, Elka Shock, and Lonestar +4 axle..

[trict_out]

man u got some money rapped up in the 250x...very nice by the way:D

[roostin_dale]

Originally posted by trict_out
man u got some money rapped up in the 250x...very nice by the way:D

Thank you....I race Youth Production GNC nationals on it...

If your not familiar with it...Youth Production is the 200cc 2-stroke and 300cc 4-stroke...

[Tread70]

Ok, I was thinking, Bradley says 400 arms on the 300 is bad because of bumpsteer. Can the bumpsteer be adjusted out. Is the bumpsteer caused by misadjustment? Also, what is the difference between extended 300 arms and using 400 extended arm other than overall width?


Tread

[hardkoratvmxr]

DO A SEARCH it has been asked millions of times even by me and it is not a good idea

[roostin_dale]

Originally posted by Tread70
Ok, I was thinking, Bradley says 400 arms on the 300 is bad because of bumpsteer. Can the bumpsteer be adjusted out. Is the bumpsteer caused by misadjustment? Also, what is the difference between extended 300 arms and using 400 extended arm other than overall width?


Tread

A search will help you. They say the bumpsteer is caused by a bad tie-rod angle and there is stress on the ball joints.

I am staying with my set-up. It has proven itself to me. Undefeated local races, Blaster class district 17 champ, Blaster class track points champ at 2 local tracks...But it seems, i am the ONLY one that likes this set-up, oh-well....

[bradley300]

heres a pic of the bumpsteer i am talking about, he's all the way thru his travel at this point, 300ex a-arms will not lean the tops of the tires in like this. it is b/c of a bad tierod angle and the spindle geometry as realted to the a-arms

[bradley300]

nevermind, he not even close to being thru his travel, it will only get worse as his tires move up

[mersingt]

couldnt i use banshee or warrior shocks if i can get them to fit.....they say they work good with 400ex's in tt

[bradley300]

warrior length shocks are the right length, but shocks have nothing to do with bumpsteer

[roostin_dale]

Originally posted by bradley300
heres a pic of the bumpsteer i am talking about, he's all the way thru his travel at this point, 300ex a-arms will not lean the tops of the tires in like this. it is b/c of a bad tierod angle and the spindle geometry as realted to the a-arms

The top of the tires are leaning like that becuase The caster/camber is set-up improperly. It was the first race of the season and I threw it together real fast to make it to the race....

My last setup was Laeger +2 a-arms and elka's and trust me, my current setup has much less bumpsteer than the laegers did!

[bradley300]

did yopu ever measure it? and do you mean twitchy steering bump steer or wheel travel bumpsteer

[roostin_dale]

Originally posted by bradley300
did yopu ever measure it? and do you mean twitchy steering bump steer or wheel travel bumpsteer

No i havent measured it. But the overall steering feels much smoother. Both steering and wheel travel bumpsteer....

[Tortured Z]

I have a question...
I want to put 400ex +2 LT arms on my 300ex, will this work? Also what length shock will I need using the stock upper shock mounts?

[bradley300]

they will not work as well as an equivelent length 300ex a-arm and a new upper shockmount with custom shocks

[roostin_dale]

Originally posted by Tortured Z
I have a question...
I want to put 400ex +2 LT arms on my 300ex, will this work? Also what length shock will I need using the stock upper shock mounts?

ive done my research on this setup. And it will not work very well. Worse than regular travel arms. Getting the LT shocks to even valve right will be a chellenge. Also, it will put extra stress on the joints...

[Out_Sider]

Originally posted by bradley300
all except for the bumpsteer and twichy steering:eek:

twitchy is right!! i couldnt beleive how twitchy it was when i rode a 300ex with a 400 front end

[300exryder03]

Hey i am also lookin to do this but only with the shock relocator. i have 400ex shocks rite now and waitin on a well built shock relocator. now how does this handle? would i be better off just staying with the 300 shocks and then get + 2 a arms for the 300 or go with like +1 400ex a arms?

[bradley300]

like a normal 300, stock works, but aftermarket works better. with stock a-arms it wont take turns any better, but it should ride quite a bit smoother

[Tread70]

Is the biggest problem with the 400ex ext. arms the lower shock mount being too far out or what? What would make using the 400 arms better? Moving the lower mount inward?

Tread

[ghak99]

Originally posted by roostin_dale
I am staying with my set-up. It has proven itself to me. ...But it seems, i am the ONLY one that likes this set-up, oh-well....


Your not the only one! I could not be happier with my set up. I measure in at just under 50" with 4:1 burgard beadlocks and the ride is 10 times better than 90% of the 300ex or 250x's I have been on. A long time ago when I was checking into it I heard every reason in the book not to do it, Bumpsteer, Twitchy steering, Hard to steer, It will kill you, Parts won't fit, Too expensive, and so on.

When I did the switch, all the parts fit, I didn't notice the twitchy steering or bump steer, and I am still breathing. It was cheap to do and I like it so I am sticking with it.