Warrior YZ250 Engine Conversion

[dmanabq]

So I trusted a fellow in Los Lunas that the Warrior I was about to buy really only needed a carburetor adjustment. I paid my $1000, got home, and discovered a broken cam plus two bent valves. Problem is the motor had signs that someone very recently opened it up. Long story short he conned me and I was dumb enough to fall for it. So what do you do with a good chassis that needs a re-power. You strip down your 1994 YZ250 that didn't survive the last wreck. Now you are looking at the Warrior YZ, or the YFM250R you decide what you like best.

 

[96yamahawarrior]

thats nice man!

 

['00 WO-YA!]

Excellent! Good job man, that's gonna be a fun ride!

 

[dmanabq]

Thank you, it was productive weekend to say the least. So far I haven't had it out of first, but it moves around the yard well. I finished it about thirty minutes ago lol.

 

[bones]

PRETTY SWEET MAN ... but why not mount the motor to the swing arm

 

[dmanabq]

Cant really on this one. The swing arm has no provision for a motor mount. On top of that the chain would not line up if I had. Using the drop brackets was the best way I think.

 

[dmanabq]

Thank you by the way lol. All my friends locally thought a YFM250R was a stupid idea.

 

[YAMAHAULER]

you gotta get some video now for us all to see and hear that thing rip

 

[Mathius]

YES!!!! How did I miss this thread?
Thats awesome man.

 

[dmanabq]

No problem I think Tuesday will be D-Day. Hopefully I can get the carb tuned back in lol. It was upset about the new exhaust and intake.

 

[Gen1Pat]

Vids vids vids!!! Looks great! Wardogs are never a waste of time, no matter what you wanna do with them.

 

[DeadLastRacing]

2 Stroke POWAH! The rads up front like that see kind of iffy, I'd relocate if possable. But I do enjoy a good hybrid quad.

Awesome sauce. I want to see some video!!

 

[broughsy01warrior]

wont the kickstart hit the fender when you kick it over??

 

[Mathius]

wont the kickstart hit the fender when you kick it over??

^^X2

I had to lengthen my kicker shaft to clear the outer frame, and cut a relief into the right side fender for kicker clearance on my 490..

 

[bones]

the 490 kicker is a lot longer tho ... plus his motor is 3-4 inch farther forward then your's mathius

 

[dmanabq]

Believe it or not the kick starter clears well. I plan to armour up the rads soon. Time will tell lol.

 

[bones]

make some air ducts for them with 20g sheet metal

 

[Mathius]

the 490 kicker is a lot longer tho ... plus his motor is 3-4 inch farther forward then your's mathius

Yah I noticed that.. His is frame mounted, as where I came off the swinger.
I was a bit sketchy about doing that on the 490, cause of the vibes. It also makes monster torque.
I think the 250 would be fine the way it's mounted. Just because it doesn't pull real hard till the powerband, and the vibes are pretty tame..
I also think a Banshee rad would fit the Warrior pretty good.. :tup:


I like this quad.. It makes me wanna push hard to finish the 490. :evilface:

 

[Gen1Pat]

You should be pushin bard to wrap it up reguardless, lol.

 

[dreded]

was it more or less bolt in?