Another Project Bike.

[Louis Mielke]

First I've got to state that this by no means is meant to steal any thunder from anyone else. This has been on the back burner for sometime now and when torker posted up his ATC250RF conversion it kinda made me sad that someone is beating me to it and so far looks likes he might have a better idea.


Honestly I'm trying to go smaller! I've started with a 86 ATC200X and stuff a CRF250R engine in it. Still a lot of work to do, and a full build thread will come along eventually. I'm really aiming for this one to be a 350X replacement. I want a nice small lite trike, with a torquey 4 stroke engine. Not much to say yet but I'll post some pictures and some build details.

This is to be the ultimate woods bike, with lite motocross duty.

So as far as details.

KTM 85sx inverts utilizing a set of HALLS PERFORMANCE triple clamps
86 ATC200x frame, tank and plastics
05 trx450R swingarm, and all rear components(yes the short one)
axis rear shock
and the rest of the details will come.

I nabbed this LOW LOW hour 07 CRF250R engine. You can eat off this thing.



And here's what I have so far. Got some more work to do. More as it develops.



It's a tite fit but I'm going to lower the swing arm pivot to drop the back end of the engine down a little and that should line this up perfectly. More as it develops.

[audioworks04]

that looks almost too easy. Good luck man any ideas for the kicker yet? or bracing on the neck to hold these massive inverts?

[Louis Mielke]

I don't agree with some opinions that these old frames are not strong enough for inverts.

I'm also not using full sized dirt bike dirt bike forks. I'm using inverts off of a KTM85sx.
They're the same ones I'm running on my 500 and I've had no issues with them (other than seals but that seems to be a common problem on these forks)
I'll be using a short banshee kicker so the fenders shouldn't be a problem.

[torker]

Looks great man. Let's do this!!! I went with the R because I think it has great suspension from the factory and it's lighter. Also I trully believe that the radiator thing will be easier on an R. Plus there's the looks of the R's that I really dig. The 200X frame should have a ton of benefits over the R as it was design for a 4 stroke from the begining, plus everything is upgradable. It really looks good. That is one clean CR you got there.

TORKER.

[Louis Mielke]

Yeah, I knew there would be some challenges but I avoided the tank challenge. I'm trading off for a radiator mounting issue, and the need to add the linkage for the trx arm. Lots of work to do here.

[the great gazoo]

Wow, wow. Lou, you're so modest, & you know how to build a machine, looks really good so far.

[Billy Golightly]

Louis, I just remember this afternoon, I have a seat that'll fit this rig if you want or dont already have one? Hit me up some time, its on the house.

[Aka_am]

450r swingarm on a 2nd gen x? Spill the details man, I knew it could be done! Great work, I'm subscribed

[Louis Mielke]

Still under development bud. I've got a long way to go and this is a back burner project. I'll let you know all the details when it's all said and done.

[Aka_am]

Well can you take some pics of the swinger now? I've seen the 250r swaps done, and I have my swinger here and a 250r frame, and there's at least a inch difference

[audioworks04]

You will have to mill the ends off the 450r swinger inorder to use it on the water 250r frames. There is a spot where the bearing caps fit onto the stock 450r swing arm, pull those off and you will see the area that needs to be removed. When you do this, be careful not to remove too much material, it needs to fit tight into the frame. If possible try to retain the use of a modified bearing seal cap that the factory 450r swing uses so that the swing arm aluminum does not contact directly with the steel frame.

[Jason Hall]

Audioworks04
The swingarm fit's an R frame without milling the side's I just recently put one on mine

[Aka_am]

Audioworks04, that's the best how-to I've heard so far, of how to modify the swingarm. You should do a write-up!

I'm still shocked that Louis put a 450r swinger on a X. I was so for sure that I needed an aftermarket swingarm for my X because nothing fit from a newer model. This Is my favorite thread at the moment.

[Louis Mielke]

Trust me. This swing arm was machined. You won't fit one into any 200x frame right off the shelf. Sorry to disappoint you. Jason Hall is helping me out with this build. He might be able to point you in the right direction. he's a master at fitting square pegs into round holes.

[Aka_am]

I'm not disappointed by any means and I understand it was machined, I'm just saying the difference is huge in my eyes. Looking at your pics. There's not a lot of meat left on the swinger mounts, do you think it'll hold?