inverted fork help

[chuk85]

i have seen quite a few 250R's with inverted forks, but i dont understand how to mount them?

do they fit in stock triple clamps? i wouldnt think so.

what forks work the best?

and how much revalveing does it take for them to work right?

do you have to have triple clamps made for them?

what axle/brake setup work on them?

i would love to put some on my bike so if anyone has done the swap some advice would help out a bunch.:D

[Tecate 50]

Any questions: Contact Jason Hall on the site, he is doing my invert set up for my 1985 Tecate right now! I can tell you this, it takes some custom fabricating when it comes to getting this right, and he is the man that can do it! Custom trees will have to be made!

I used 2006 YZ85 forks for mine. I wanted to use the KTM85SX forks, but I couldnt find any available!

[chuk85]

sweet! thanx man. really just 85 forks? i would figure at least 250 forks..but i have no idea thats why im asking.

[Louis Mielke]

Larger forks do work but the smaller ones from the mini dirt bikes are a bit more proportional and take less work to get installed. HOWEVER both the full sized ones and the smaller ones have trade offs and their own unique issues. Specifically the KTM forks are known even by the dirtbike people to need seals constantly. I've been doing about a set of seals a year on my KTM forks.

[Kintore]

I have shortened Cr125 forks on mine, with jason hall tripples and front hub setup.
He is for sure the man you need to talk to!

[chuk85]

i see. why dont the larger forks work? just to bulky? i just put seals in my stock forks tonite and saw that one is bent so im going to replace it soon.

some of the guys at local shops i have been talking to said that inverted forks dont really help to much and look cool more than anything. is that compelty true?

[Louis Mielke]

i see. why dont the larger forks work? just to bulky? i just put seals in my stock forks tonite and saw that one is bent so im going to replace it soon.

some of the guys at local shops i have been talking to said that inverted forks dont really help to much and look cool more than anything. is that compelty true?

The larger forks work fine, they just require more work to make triple clamps for.

As far as your guys at local shops, they probably think you're wasting your time with you three wheeler and are indirectly discouraging you against inverts.

As far as are they "worth it". Inverts vs. Standard forks are night and day different. Standard forks are like pogo sticks, inverts are like bouncing on a cloud.

[chuk85]

ok so i need to find some cr 85 forks?? or yz maybe? ktm?

what do you do for an axle? and brakes?

[Tecate 50]

I used the yz85 forks, brake caliper, rotor, with a 250r wheel and hub! The rest has to fabricated......contact Jason Hall!

[Louis Mielke]

As bad as this sounds you need to find out how dedicated to the idea you are first. I know I had about $700 wrapped up in my inverted fork setup for my 500 and that was on the cheap side. Remember you need to re-spring the forks because typically they're too soft for a trikes use in stock form. You need the triples along with all the hardware.

Jason has things pretty figured out to get you setup. He puts together a nice kit with the hardware, brake rotor adapter, front axle, info on brakes and he'll talk with you to help you figure out exactly what forks to buy. Etc etc. This isn't for the casual person. Be ready to pony up some bucks. Shoot Jason Hall a pm and I'm sure he'll talk it out with you in private. There's alot of thought that goes into these kits.

[The Goat]

BIG FORKS FOR BIG BOYS! lol

couldn't help myself.

Damn I'm ready to get my bike back!

[zmpolaristech]

I will be running the KTM85SX forks on my Tri-Z. They are about the PERFECT length, no cutting required. And yes, Jason is building my triples as well. I should have them very soon. I scored my inverts off fleebay for $175!!!

[Derrick Adams]

Jason and I have spent the last few years refining the invert fork swap kit and if you dig around you will find that most of the swaps out there came from Halls Performance.

Here are a few tips for you. First, ask yourself what type of riding you mainly do? If your a casual trail rider then the small forks may work out good for you, however while you will gain some smoother travel, you could very well loose some (over-all) and most of the 80cc dirtbike forks are actually smaller diameter than your stock 250R forks. If you tend to trail ride aggresivelly and/ or spend any time on an MX track, then the KTM85SX forks are the best bet. They are larger, stronger and the same length as your stock R forks. This kit is sold complete with every fabricated part you need to bolt up your KTM forks, rotor, caliper, and 250R hub. Now if you ride heavy MX or are a high speed Dune junkie, then 250/450 forks are the way to go. Long travel is the key to a super plush ride. These forks take the most work but reap the most benefits.

PM Jason or myself for more information.

[Dirtcrasher]

I'm certain some day I'll have inverts, but I don't want to fight 100 guys over the KTM forks esp. if they need seals once a year.........

I'd be much happier with 125 or 250 forks but I have NO CLUE how they get shortened unless I have a set here to play with. If it's a matter of chopping them down and re threading them, I'm sure I can get that done.

Seems like the KTM forks are being bid on by everyone......

Did KASEY ever cough up the year and model fork he figured out and was happy with??

Never ending battle..........................

[1BFC]

So I finally figured out the trick to getting the seals into the 85SX KTM forks without killing yourself and the seal...

Have a hairdryer blowing on the fork tube for 5 minutes prior to dissassembly and re-assembly. ESPECIALLY if you are using the Hyper brand seals and not OEM. The ribs in the Hyper seals grab every little ridge on the way in and almost no amount of hammering gets it back together properly.

Heat up the tube with the hair dryer and it goes together with a minor bump. No torch needed! Makes the fork job take about 1hr total for both forks from start to back on the bike ready to ride finish.

Also, slip a pair of shock socks on when you do the seals. That extra wiper is another barrier for that one grain of sand to get past before it lodges inside the seal and starts that pesky leak..

Oh, spring rates.. 0.44kg/m springs for 150lb riders (like myself) or 0.47kg/m springs for heavier ones. Adjust the bottoming resistance with oil level in the fork. Works like a champ! My forks use about 75% of their travel on the woops and the last 25% soaking up the landing on jumps.

It's almost like cheating compared to the stockers. Best money ever spent on the bike for sure! You can't go wrong with Jason's setup. I've beat on it and it's solid.

Good luck!

[fire1]

I love my inverts i used the ktm forks and Jason Halls kit .

http://i399.photobucket.com/albums/pp71/fire1man2008/Picture003-1.jpg

[Derrick Adams]

Fire1 thats still to date the nicest 250R i've ever seen!

[Tecate 50]

Absolutley.....thats one bad looking ride!

[chuk85]

that is a super nice 250r. so i talked to jason and he got me up to date on what i need to do, so as soon as i get some money im ordering the kit from him

[fire1]

thanks everyone

[inv3ctiv3]

Why has no one tried doing this on the 350x?

[Dirtcrasher]

I already made my front better with the 84 250R guts, but the rear end still suks....... I imagine there just a bit too heavy for these goodies......

I'll leave my 350X as is and build a 250F trike before I'm so old that I can't jump anymore :D were only a few years away from that unfortunately!!

EDIT - AWESOME 250R!! :beer , the inverts and 450R rear goodies make it look and perform superior!!!!!!!!!!!!!!

Those KTM forks grab some good$$ even more than OEM 250F forks....... I need to know whats involved in "shortening" 250F forks? I guess I'll have to give Mr. Hall a call.............

I don't want to fight 5000 3WW members for KTM forks!

[fire1]

Why has no one tried doing this on the 350x?



getting ready to now building new 350x with reinforced frame

[Jason Hall]

We have already made triple's for the 350X to fit Invert's. I'll be doing my final assembly on Goat's bike with Full length dirtbike forks. I've Been Crazy Busy, but now that the weather Is warmer I'm finally making some Headway with a Few project's!!

[inv3ctiv3]

We have already made triple's for the 350X to fit Invert's. I'll be doing my final assembly on Goat's bike with Full length dirtbike forks. I've Been Crazy Busy, but now that the weather Is warmer I'm finally making some Headway with a Few project's!!

Sweet! Would you be selling them as a kit?

[Jason Hall]

Sweet! Would you be selling them as a kit?

I've been kicken the Idea around, but I think for the aggressive rider's the frame needs some work first!!

[inv3ctiv3]

Well if you do ever sell a set I am #1 on the list! I'd def want to re-enforce the frame.

[Kintore]

Ditto, ive beat on mine pretty nastyily if that is even a word.

here are some close ups for ya bud,
http://i60.photobucket.com/albums/h25/JoshTriZ/TF09/P7120253.jpg
http://i60.photobucket.com/albums/h25/JoshTriZ/TF09/P7120252.jpg
http://i60.photobucket.com/albums/h25/JoshTriZ/Pink%20RRRR/P3163696.jpg

[zmpolaristech]

HAHA! Yes boys, i made the investment in the ktm forks (stole em off ebay for $175!!!), got the springs custom wound from Pal Verde performance ($150) and they are on the way, picked up a 250r front hub (Ebay $10 shipped), and nabbed a whole 85sx front brake system (ebay $100 for rotor caliper master and line), and My Hall performance triples should be hear THIS WEEK!!! Jason said he maid them a bit different than the rest because I am such a big guy. I CAN'T WAIT TO TEST THIS SET UP OUT! Their first test will be at smith road at the end of this month! I am going to mount them up on my black bike (the one I had at icefest) along with a goldvalved and sprung banshee rear shock and modded fuel tank... since my big bore STILL isn't ready for powdercoat... but its gettin closer.

[Tecate 50]

HAHA! Yes boys, i made the investment in the ktm forks (stole em off ebay for $175!!!), got the springs custom wound from Pal Verde performance ($150) and they are on the way, picked up a 250r front hub (Ebay $10 shipped), and nabbed a whole 85sx front brake system (ebay $100 for rotor caliper master and line), and My Hall performance triples should be hear THIS WEEK!!! Jason said he maid them a bit different than the rest because I am such a big guy. I CAN'T WAIT TO TEST THIS SET UP OUT! Their first test will be at smith road at the end of this month! I am going to mount them up on my black bike (the one I had at icefest) along with a goldvalved and sprung banshee rear shock and modded fuel tank... since my big bore STILL isn't ready for powdercoat... but its gettin closer.


Thats awesome....I should be getting my set up here shortly for the Tecate! Jason said I need to re-valve or spring them once I get them back! So I'm working on that now! Big bore huh.....? lol