ATC 600X Build Specifics

[mcgyver331]

Hi All,

I am sure like others I need things spelled out for me. I would like to start a thread to help all the people (including myself) needing instructions and a parts list to build the monster 600x trike as well was make it as versatile as the stock 350x.

It seems as the 83-84 atc 250r tripple trees are used and the threaded part of the xr600 tripple trees is pressed out and pressed in to the atc tripples. if that is so lets set that in stone and move on to the forks used.

My thanks go out to any help.

I have done a bunch of full restoz on 4 wheelers, 3 wheelers and dirtbikes as well as a few custom
builds too.

[tapper190]

I used the 350x front forks on my build. It started out as a xr500, then last year i dropped in a xr600 motor. I was going for a 350x look a like. Rides and handles like a dream.
Tapper

[lilgsxr1000]

I started with a xr650 and with a Lil work on the triple of a 85 tecate it bolted it.but it have me a low center of gravity. I was ok with it because it wasturned into my street trike. Obtw there are allot better motors to start out with those xrs are kind of a dog just my .02

[mcgyver331]

I am just using what I have laying around and adding very little to it. I may do the XR650 e start upgrade (old xl crank and newer XR cases) not too sure yet. I have a 1985 ATC 250r front end coming from a friend and I know the fork tube sizes are the same dia as the xr600's so I will use the 250r's bottoms and triples and the XR tubes I will spell out everything once I get er done.

[mcgyver331]

ATC 250r Fork Pic 1ATC 250r fork pic 2
XR 600r fork pic 1 XR 600r Fork Pic 2

Same Fork Seal Part Numbers

Do you think I can put the 600r tubes on the 250r bottoms?

[mcgyver331]

just to be clear the 250r fork tubes I have are bent

[Big Mike]

I would say no, but just from looking at the pictures the XR600 forks look to be 2-3mm's bigger than the 250R forks, so that would never work.

[mcgyver331]

The Seal kit is the same part number so the dia is the same unless I'm missing something

[mcgyver331]

I must have missed something or bike bandit uses its parts numbers differently. The tubes were way bigger.

[mcgyver331]

I went and pressed the 1987 XR600r steering stem out of the tripples and pressed it in to the 250r tripples, now I will do the build while I look for an extra fork tube.

To let everyone know the 250r stem and the 600 stem are the same diameter.

[Yamaha_Rules69]

Just bend the 250r tube back into position. I did this with a set of 85 R forks I am using on my 84 fooler project. I have also straightened 350x forks, 200x forks, yamaha 225dx forks, etc. The key is to fully disassemble the fork, so you have just the upper tube. Put it in a press, and push it on the high spot (bend). You want to press it past, as the fork will spring back. It always takes a couple tries, but dont use too much pressure, and it will turn out 100% better than what it was.

[mcgyver331]

Cool Thanks Yamaha_Rules69

I have built up the front end a bit, and now I'm looking to see what rear swing arm I can use.

The 300ex swing arms are too wide for the 600r opening. Next.....................

[Blown 331]

I wouldn't use a 300ex swinger on a XR frame, you'd be loosing the pro-link.

My cousin in working on one using a 1998 XR650L. I usually not a big fan of electric start but at least is solves the problem of a rearward kicking dirt bike motor hitting the rear fender. He is using the 350X frame but cut the cradle out of the 650 frame and welded it in the 350X frame. That part is done and the engine is in.

[Blown 331]

[mcgyver331]

picked up a 350x +3 swing arm and a roller 200x this week. going to use the 200x front wheel and brake master. it came with 3 gold rims too. i wish i could use the axle but i need to have the adjustment at the rear not the engine cradle. does anyone know if a 200x axle fits in a 300ex carrier?