250r INVERTED FORKS

[85 250sx]

this is some sweet news! ive always like the look of inverts buth always thought it would be to much trouble to make it happen

[Black86tri-z]

It's kinda lame people keep this stuff a secret, who cares? Wouldn't you want other trikers to have the better ride of newer suspension? I don't even have a 250R and I wanna know....

http://i187.photobucket.com/albums/x...SamJackson.gif

[ditchmud]

http://i187.photobucket.com/albums/x...SamJackson.gif
That is so effin true!!!! Off topic but this should be my signature because that is one of my biggest pet peaves about this forum.

Mr. Kasey, please enlighten us when you have it all figured out. Thank you

[KASEY]

well with one small spacer the clamps convert to a 250r stem very easy . so installation on a 250r is a snap.. just a little grinding to clear the top nut and they fit pretty nice,,, the clamps are for a late 90's VTX1800 HONDA,, SO LET THE SEARCHING BEGIN,, the forks i have are 1 inch longer than stock 250r forks .. there are no identifying marks on them so i can't say what they fit,,, it appears they might not be japanese either,,, i am still searching on the forks its going to take a little work on the front brake,, the disc is going to have to be a little bigger to get a full width into the caliper,,, but i have them mounted and the brakes are the only issue i have to finish,,, the clamps fit the forks on the lower but i will have to have a shimm made for top one .

[devilman]

late 90's? 02 is the oldest vtx 1800 i can find.

[Hipower]

Did you try any other forks?

[Billy Golightly]

Kasey, so can you give us ID measurements of the tripples so we might be able to find something to cross over?

[250rmanfmf]

I was very interested in this thread and followed it cause I too want inverted forks but didnt want to spend $400 on triples.

Come to find out I know what forks you have! You have a set of Aprilia RX125 Front Forks part #S1100HGS810. I have the same set (was on ebay now there off ). They are about a 1/2 inch shy of a stock 250r fork. Also Good luck finding a set. They are not that easy to come by. But with all the Chinessee and Italian made parts about 99% of them were produced already by the big 3.
For example- the Kasea 50cc dirt bikes, there motors are the same as a KTM 50 jr. also Kasea Skyhawk 170/250, alot interchanges with Blasters. Kasea/eton parts swap with Polaris Scrambers.

From what I can measure on the forks (if my calipers read right) is the top part of the forks are 50mm & bottom 54mm. They are about 34 inches from the center of front axle up to top of forks.

Now I just need a triple clamp

Tyler

[250rmanfmf]

here is a pic of the forks I have

[Billy Golightly]

Those dimensions sound very very close to the KTM85SX forks that I used on my tri-z that have now become the popular switch. I think they are 56mm at the bottom clamp and 49mm at the top from what I can recall from memory, so with a very minimal bore job you'd be setup to run them which are maybe easier to find parts for. They've also got full re-bound dampening adjustments (those forks didn't look to have it from the pics Kasey posted)

[KASEY]

wow ,, are there any numbers on those forks anywhere? i searched through 200 sets of forks to find these,, they are as close as i could get to the stock length and have the caliper on the proper side,,, can you post a pict of the caliper bracket and the mounts on the forks? thanks

[Bryan Raffa]

wow is right,, what are the chances of a guy having the same set of Aprilia.. forks...

[KASEY]

well i did stay at a holiday inn last night

[Dirtcrasher]

Regardless, it's a great idea but the chances of the 200 or so of us getting all the parts are about as good as a scratch ticket.... However, I do thank you very much for sharing!!

Fortunately I have 7' of 1"x4" 6061 aluminum and a Bridgeport so I can make my own triples. The forks themselves don't seem very abundant so the search continues. But, at least you shared your info :

Sorry to my good buds, I have to keep this alloy for myself. But, creative steel is always an option :

I guess I'll just try and grab some 125 or 250cc forks from the big 3 and I'll ask Goat how his work out........

Any way you slice it, it's big $$ for forks. Maybe finding a YZF, using the forks and popping the motor into a Honda chassis is the best way to go. IMO Honda still do9esn't make the best thumper powerplant which is a damn shame

And...... I need some rake anyhow being a 350X. OR. I'll pull a Jason and mess with the rear shock height or chop the neck to the desired rake.

There are other triples that appear similar but I don't have junkyards like you do Kasey so I may just have to make them. Fortunately, I do have a nice boring head and the outline can be hand milled and blended in.

But, if I must pay 300$ smacks for awesome forks and make the rest myself, it may very well be worth the work involved!!

I wondered what fork you had, 2 piston calipers aren't on many of the newer MX bikes.............. Didn't seem like anything I had seen before............

Thanks again for sharing!!!!!!!!!!!!!!!!!!!!!!

[fire1]

heres a picture of the forks i put on my r there 2005 ktm85 sx forks