ATC 250RF project under way...Still at it!!!

[torker]

Hi there guys. I was going to wait until it was done, but I can't keep this a secret anymore.
This is a pic of 2 weeks ago, a lot have been done since. I just want to give you guys a little bit.
For now. Here's a pic .

http://img189.imageshack.us/i/hpim0240e.jpg/]

What do you think??????

TORKER.

[Yamada]

That is not a Honda engine????

[volfan537240]

yfz450 engine right?

[torker]

No, it's not a Honda engine . But it's coming along great. Today was ups and downs. I was supposed to start welding today, but it was not meant to be. Tomorrow, after some welding, I'll do a write up until where I'm at right now. Have a few pics as well.
Here's 1 more:


TORKER.

[JohnR.]

That's not a 450 is it? CRF250 engine?

[Kintore]

I would have to say a 250 as well?

[Billy Golightly]

Thats a dual OHC motor...all the Honda's are SOHC

[JohnR.]

No, it's not a Honda engine .

I guess I should read more carefully.

John

[Bryan Raffa]

GIT IT!!!!!!!! I got my frame out last night!! its on the bench...

[audioworks04]

Deffinatly a YZF motor or a YFZ with a kick start conversion, I would say a yz250f. Most deffinitly not a honda like other people have said honda uses a unicam motor.

[torker]

Ok guys. Here we go. Originally I wanted to put a 350X engine in my TRI-Z frame, but the engine deal fell thru. After I said I was NOT putting down the money for a 250F engine, that's exactly what I did. I didn't find a YZF250, so I bought an 06' RMZ/KXF 250 engine. Yeah it's the same engine made by Kawasaki. Please, don't turn this into a Yamaha vs Honda vs Kawasaki vs Suzuki vs KTM engine thing. The motor is already bought and it's already in. And I guess it may have good and bad things, just like any other. But the price was $800.00 so I guess It's not bad. At least that's what I think.
This engines in particular are not torque monsters like the 350X's but they put down about 35 horses and good torque across the rev range.
I wanted a 4 stroke (and no, I did not want a 350X, it's frame and suspension are not good enough. Not to mention it's weight) so I guess this is it. Nobody (that I've seen) has put a 250F engine in a R (or Z) frame. So with this we'll put to rest the "good or not so good" debate about the 250F's.
This is what I'm planning for this build:

-Big Radiators (these engine tend to overheat and I want to make this as reliable as I can)
-Oil cooler (overheating and reliabilty again)
-Light weight (these engines are lighter than R's engines, and by a substantial margin)
-I'll need to find a way to install a radiator fan, somehow???
-A re-worked stock suspension will do, so, no upsidedowns or 450R swingers in this one (budget will not allow for it)
-A 7oz flywheel weight will be installed to get the engine characteristics that I'm looking for (this will help with stalling engines in thight stuff, easier starting as the engine will want to spin easier and more important, it will spread the power and gain some very much needed torque and not necesarilly loose anything.
-This will need to be a all around bike, so engine characteristics will be important.

Please bear with me as I go along with this. It's my first hybrid, so I'm going to need all the help I can get.

So what do you guys think????

TORKER.

[Billy Golightly]

Congrats Torker! I think this is a great project and its been talked about by a lot of people. I know of a few others that are in the "skunkworks" stage of development right now. If I can help out with anything, feel free to ask.

[torker]

This is with what I started: The DRAG bike



It was a low budget/left overs Drag bike I biult for fun on the cheap. It ran a best of 5.08. But with all the local sand tracks closed, it was not beeing used. So, you know what that meant. The perfect project candidate . It was turned very quickly into my woods bike, but it was never raced. It's zero (0), yes 0, hour engine was fired and it ran for about 2 minutes and then turned off (a small and slow leak was discovered thru the shift shaft seal). It had no chain, so the trike was not ran.
Then my mind went into overdrive and this is where I've ended up doing.

Frame without engine ready for some cutting.



After the stock engine mounts and supports were cut.



The top engine mounts were cut after "thinking" they needed to be cut as they were interfere with the valve cover. WAIT...THIS WAS NOT NEEDED!!! Oh well...



More to come...

TORKER.

[torker]

Congrats Torker! I think this is a great project and its been talked about by a lot of people. I know of a few others that are in the "skunkworks" stage of development right now. If I can help out with anything, feel free to ask.

Thanks Billy. Your help will be needed in due time.

Enjoy.

TORKER.

[torker]

Uppssss!!! Please, continue to the next page.

TORKER.