KX250 Chassis With 500 Motor

[BigGreenMachine]

Well I wonder if they kept the specs?

I was thinking the same thing, wondering if they kept the jig. You call? Price would probably be 500CDN or like 400US.

[gwcrim]

Looking as closely at that pipe as my old eyes allow.... the first 4 letters are FLOW.  Flotek it is not.  I posted a link to that photo on DRN to see if anyone can identify the manufacter.

[hillclimber147]

1997 KX 250 chassis, 2000 KX 500 motor. Building an FMF Desert pipe, I had a Pro Circuit pipe before. I decided to go with a permanent "solution" to the coolant hose problem. I cut off the existing fixture on the side of the cylinder and had a new fitting welded onto the back of the cylinder like older CR 500's. I would probably just go around the hose if I do it again. Also since this is my hillclimb competition bike only, I did not worry about my kick starter hitting the pipe when folded in, as I will take it off after starting. And yes it does hit!!

[hughes]

The hill climbers always come up with cool stuff. That exhaust pipe is trick looking, Nice welds. Wrapping the coolant hoses is a cool idea.

[BigGreenMachine]

Definately going to build my pipe to go around the hose. Didn't realise this was a problem but its not a big one.

[gwcrim]

I have a crazy kind of bike friend who happens to be a welder by trade.  I mentioned this idea to him and he offered his services.  That takes care of a certain portion of the project.  There's a machine shop nearby that has done some custom work for me in the past.  There's another situation solved.  I'd most certainly do a compression release during the tear down.

Just need to get answers on this pipe situation. 

Then I need to get over the idea of sacrificing a bike.  That will be the hardest of all!

[gwcrim]

So Hillclimber, what did you use to fabricate that pipe?

[hillclimber147]

So Hillclimber, what did you use to fabricate that pipe?

I cut along one of the factory seams, rotated the pipe to where I needed it,tacked it, then made one more cut,rotation and tack weld. Just route the pipe to where you need it to go. Try not to change the internal volume and/or dimensions of the pipe much. Here is an interesting link to Two Stroke Pipe theory:
http://www.maxxtraxxusa.com/Tuned_Pipes_3608.cfm

Also download this PDF, very good info if you've ever wondered about two strokes in general:
http://edj.net/2stroke/jennings/

[demographic]

Looking as closely at that pipe as my old eyes allow.... the first 4 letters are FLOW.  Flotek it is not.  I posted a link to that photo on DRN to see if anyone can identify the manufacter.

As far as I remember Flow make the formers that stamp out the aftermarket expansion chambers, it said something about it in Eric gorrs book but I can't find the exact wording right now.

I assume that they have also done so for the Zipty spannie but I can't see anything about it on my zipty spannie

[gwcrim]

Thank you Hillclimber.  I suspected that's what you did.  Looks pretty good, though a bit impractical for the every day rider. 

I kinda thought that Flow was the name on that pipe, but since ya cant see the rest of the tag on it, I wasn't sure.  Do they have a website?

[gwcrim]

Something worthy of note:

http://www.ftzracing.com/images/atvpipes07.pdf

[demographic]

I kinda thought that Flow was the name on that pipe, but since ya cant see the rest of the tag on it, I wasn't sure.  Do they have a website?

I looked today but after throwing various search criteria into Google came up with nothing worthwhile

[gwcrim]

I heard back from the guy on Everything 2 stroke:

I had the pipe custom made by a guy who makes production kx500 pipes. It's a one off pipe made from stampings so it looks like something you could go buy but you can't. I tried to get ahold of him not to long ago because I want to build another bike with a kx450 but I could not get him on the phone or to call me back I will try again and get back to you...

I replied and asked for his name and employer.  So far so good.

[BigGreenMachine]

I'm out, selling my 500 motor and moving to Alberta for work. Going to build a 310 for my 250 chassis.

[MadKaw]

dude, you're not gonna do it? the 310 will still be pretty cool though...good luck man with the move.