Author Topic: ATC inverted forks (Read 17635 times)

pantera1975 · « **on:** July 25, 2013, 10:06:58 PM »

All I know of is Jason Hall has a triple tree kit to put I think 97-06 cr forks on a 250R not sure if 125 and 250 forks are the same. I have some 96 CR forks he told me they would work too. There just dont seem to be as many options for lower fork guards. I have less than $100 in the forks,rotor,caliper and a front master (which is not needed). The kit is $550 and then its another $2-300 to have them shortened. Is there any other kits out there? or set ups? What kinda internal work has to be done with the forks as far as valving and springs to get the best ride and performance on a 250R.

hotrodhoppy · « **Reply #1 on:** July 26, 2013, 03:03:30 PM »

I used the vtx triples and full length yz 250 forks for my set up. Had to go with a 6" swingarm and stiffer shock on the rear witch made it taller and longer. Works great as a duner but im not sure how it would be on a track.

JasonB · « **Reply #2 on:** July 26, 2013, 10:48:15 PM »

Going to need shots of your set up hotrodhoppy, stat! I want inverts to be my next project

Fire1 · « **Reply #3 on:** July 27, 2013, 08:54:35 AM »

On my first s setup I used the KTM85 forks and front brake. I used heavier springs in them and never had any problems with them although some people had problems with blowing fork seals. On my 350x I used 01 cr500 forks and never cared for the look it gave the bike but it did ride nice. On my newest build ill be using the shortened cr125 forks and I'm going to wait and see how everything works before I change the valving or springs.

JasonB · « **Reply #4 on:** July 27, 2013, 05:35:44 PM »

Fire1, since I started my atc500 build I have kept wondering why people don't use the cartridges from the heavier bikes like the cr500. I mean you would think they are built for more weight from bigger bike etc. Why didnt you like the look of them, too long or what ?

The_Steve_Man · « **Reply #5 on:** July 28, 2013, 11:12:57 AM »

DOORD521 at 3WO has Hotrodhoppy's inverts on his R. He has a +6 on his bike and said they worked like a dream at Little Sahara.
Jason we are going to St Joe and he will bring his R along with his Tecate 500

KASEY · « **Reply #6 on:** July 28, 2013, 06:12:00 PM »

I used aprilla rs-125 forks on both of these trikes, they are 1.5 inches longer than stock 250r with 2.5 inches more travel.. love them in the dunes very plush ride ,,,, I also used vtx1800 triples on both.

JasonB · « **Reply #7 on:** July 30, 2013, 09:18:42 AM »

I gotta ask Kasey, did the steering stem press into those tripples? Was there any milling you had to do to the holes to accept those Aprillia cartridges? And did you make your own front axle and mounts for brake caliper and what caliper did you run? Feel free to PM me if you dont want to put all that out there! Just looking at making a set up for both my ATC's, thanks

pantera1975 · « **Reply #8 on:** July 30, 2013, 10:23:53 AM »

Quote from: JasonB;6465

I gotta ask Kasey, did the steering stem press into those tripples? Was there any milling you had to do to the holes to accept those Aprillia cartridges? And did you make your own front axle and mounts for brake caliper and what caliper did you run? Feel free to PM me if you dont want to put all that out there! Just looking at making a set up for both my ATC's, thanks

Im running the stock length swing arms, Im interested too with how the hub fits and what I all gotta get to do the conversion.

JasonB · « **Reply #9 on:** July 30, 2013, 01:34:30 PM »

Quote from: The_Steve_Man;6176

DOORD521 at 3WO has Hotrodhoppy's inverts on his R. He has a +6 on his bike and said they worked like a dream at Little Sahara.
Jason we are going to St Joe and he will bring his R along with his Tecate 500

When are you guys going to st joe? If its the fall ride on September 7th I can't make it, that's my anniversary w the gf and I doubt a ride would sub for 'quality relationship' time lmao. I want to check out both of those machines!

The_Steve_Man · « **Reply #10 on:** July 30, 2013, 06:56:17 PM »

Quote from: JasonB;6523

When are you guys going to st joe? If its the fall ride on September 7th I can't make it, that's my anniversary w the gf and I doubt a ride would sub for 'quality relationship' time lmao. I want to check out both of those machines!

But if she went riding too, that would be doing something together. Some women just don't get it.
It is the fall ride. Maybe you could make it down here sometime. there are several places to ride around here.

JasonB · « **Reply #11 on:** July 30, 2013, 11:04:33 PM »

I want to set up a little Sahara trip this fall, like pre thanksgiving. Might make a big whorish production of it and include all six websites lol. And she won't bite for an anniversary ride lol, she enjoys riding but a ride on our 4 year anni won't fly lmao

mrtwidster1 · « **Reply #12 on:** August 25, 2013, 12:28:30 PM »

I machined the triple clamps. KTM 85sx forks, stiffer springs. Machined front rotor adapter. Still untested. Still working on this build.

Fire1 · « **Reply #13 on:** August 25, 2013, 06:44:25 PM »

Quote from: JasonB;6650

I want to set up a little Sahara trip this fall, like pre thanksgiving. Might make a big whorish production of it and include all six websites lol. And she won't bite for an anniversary ride lol, she enjoys riding but a ride on our 4 year anni won't fly lmao

Just celebrate it the weekend before. I spent my 25th anniversary at St Joe last year and my 26th this year. We just celebrate before I leave. And she started it all she bought my first 3 wheeler we were 16 . So 33 years and still going ...lol

The bike looks great Tony!

KASEY · « **Reply #14 on:** August 25, 2013, 06:50:21 PM »

I been married 35 years,, and we look back and just laugh at the stuff we gave up for a anniversary date,,,, its just another date like a Saturday or a Tuesday.. being together is the important part .. not going on a weekend adventure WRONG!!! LIFE IS SHORT EAT DESERT FIRST!!!