take a look

Now to get pricing for parts and get it back to running better then before

Time for a stroker, larger bore, and a turbo

any damage to the head?

Sweet ...Thats an easy fix

way better than you thought

?? Shaun what year is your 450?

its a 2006 YFZ 450

I was looking at the pics.....The blue tint on your crankshaft looks like it's seen some serious heat! Is that normal for those?

I would say that crank is wasted, the metal near the rod journal is clearly detempered. You might be in for a lil more than what you were thinking. Your already in for a nasty repair bill, slap another piston on there and see how far it will go. The cases can't be as hard to find as mine.

Well on second thought, I can say, it will be expensive enough as is. Good luck brother, you might need it. Hope you don't spend the amount of money I did when I hosed my motor.....

I would comment the killer job you did on that piston but that would be

Thats what I was thinking.. Cant be good...

Is that the compression release on a Yamaha?

Not to sure on a four stroke, but if the rod don’t twist on the crank or slop side to side the bearings probably still good. New piston and bore and you should be set

Yeah looking into new piston and bore. Probably going to have to do an oil mod as well so its gets an extra shot. And Im getting a higher output oil pump as well. Hopefully can fix it for one last ride before it gets stupid hot.

Can't believe that happened with you just putting around, when you get her fixed give it more gas, it will pump more oil! Get her done for Easter Weedend.

Putting around my A**

if you have questions, call me, I built my 06 as well

dave
858-254-7922

Just put some JB weld on it and run it.

DFQ Just get a new quad.

J/K
Good luck with it and HAVE FUN...

Good job Shawn!

Ouch!

Hope it all works out for ya by Easter!

Do yourself a favor...call Bugsy. He's a good guy if you haven't met him. I'm sure he can offer you some advice or help.

Is it insured? Could get stolen, or just burn up one night. Never know wierd stuff like that happens.

I owe more then its worth sadly Im dumping my savings $ into some parts for it. Unsure how long its gonna take though.

Is that a stock engine or were you running high compression? Nice venting for sure. I would also have the crank checked out. It looks like the piston was venting combustion right onto the crank. If it got hot enough to discolor the massive chunk of steel that is the crank, it probobly did lots more damage to the bearings.

This is the plan so far. Its cut and paste from another email but the details are in it


"Good news... Actually GREAT NEWS!!! I just talked with the owner of BIII Racing. He said he will port intake boot, head, lap the valves, get the correct shims, so it is ready to bolt on and ride, and give a ported ESR intake for $200!!! Then all we sould have to buy is the gaskets and piston and he is sending me pics of how to do the oil mod. This thing will run amazing!!! but the port job alone is normally $600 from him, $1000 with mmad, and even curtis' port job is about $700 plus 6 months waiting! Let me know if you want to do this... He also recommends the taper bore of you carbs to 42.25 from sprdrum racing, I think it's about $150...
oh and the piston... we will go with a 12.5:1 compression CP piston... a lil larger bore... +1mm, which is a 96mm piston, and all we will have to pay for on that is the cylinder bore and hone, which shouldn't be much over $100, and shipping..."

Thats unfortunate. Looks like a possible heat issue. Give us a call if your not already hooked up.

PDR

Nope, they all look like that. The blueing is present on cranks that are new in the box. That is nothing to worry about.
Dune Freq, are you friends with Raptorfam? If so, I believe you are getting your piston from me. Good luck with the rebuild. If you guys need any help, feel free to PM me.

Yeah Im with Rapfam racing. Small world Tom told me the same thing about the blueing of the crank so yeah, not worried. Ill keep things up to date on here. Thanks for the Piston!!!

Nice!! Have till Friday to get her done!!

Like 24V said......don't worry about that blueing on the crankshaft. That is part of the process of how they press the webs togather. Its all done with heat back at the factory.

I wouldve just picked up a 13:1 CP piston, a set of gaskets, and a 2007 oil mod kit from PDR anad be done with it.......having it done by Friday wouldve been a walk in the park.

saw this on lamespace...bummer

look at the last thread i posted.

I worked a number on my 05


so i went and got a 525 cc ice cube big bore stroker engine........... IT HAULS ASS

and then i have another 05 for more recreational riding.

But i blew the piston, crank, cylinder, valves, head, metal got in the tranny and trashed the gears and cluth, the rod went through the case

Small world indeed! If Tom (Rapfam) says its good to go, well then its good to go!!!! Tell Tom Roostking said Hi.

CP's are the best, thats for shure.

Still waiting on engine parts but here is a sneak peak of whats been done in the meantime.

Oh yeah...we got the piston but This is whats taking the most time. Have to bore this damage out...

Anyone know price of powdercoating? I need the nerf bars and A-arms done.

Good job Shawn, getter done will be going to Mother G again soon

That looks killer!!!

Bump

Did you cut those plastics your self??? plus what type of plastics are those??? AND are they painted or bought like that?

Pending on who you take it to and color choice, it should be less than $100 for sure. There might be a minimum charge though. I had a whole frame and a box full of parts for less than $300.

Bike looks bad ass man!!!!

Best news I heard in awhile. Ill have to start powder coating some stuff. Thanks!

Stock YFZ plastics that were cut. Friend of mine did the painting.

NICE...........

Looks awesome brother, good job. Thats what i like fast and reliable, get-er done, need more pics, ray

So how many hours have you put into it??

Quad finally fixed and running

Good job Shawn it ran and looks great!

how big did you go? any other upgrades?

Its a 480 now. Put on a big bore kit. Ported ESR intake, Cam Mod, New clutch. Curtis Sparks big core "shorty" pipe and header