KX500 Powered Quadracer 250R

[sandblaster]

That is really cool.
Thanks for sharing that with us.

[motopunk]

Lol I do like the name. I'll have my seat cover done at an upholstery shop so they can put the name in the seat cover.

Here is a couple videos for you guys. Head gasket started leaking coolant down the side of the jug by the last video. I guess Windrosa doesn't make a good head gasket. So now I need to find a good one.

Sedona tires on back. They work but not real good.
https://www.youtube.com/watch?v=kc-TOz97Y5k

Sand Shark Paddles work much better.
https://www.youtube.com/watch?v=g9wpie0WBN4

Head gasket started to leak and at the end started overheating
https://www.youtube.com/watch?v=euTRvTw-7XU&noredirect=1

thats what i thought as i spontaneous created this name... on the seat or tank: ..."goatzilla 500"   


maybe there is also a little scratch on the gasket surface of cylinder or head, that needs some attention... i dont know winderosa, because not available here in germany.
  in the moment i use a "athena" headgasket on my 86-kx500-engine ..works pretty well ..
found "NE super brand" gaskets by a dealer in poland . cheap and worth a try on my 87 kx250 ... i think quality has not to be always very expensive... 

[Pmcg]

I love everything about that quad. Looks like a blast in the snow

[Goat]

Normally I use Athena gaskets but I had an extra top end kit laying around from the PO. The head and jug surface is flat. I check them every time they are apart. Head was properly torqued and checked frequently. I think its just a cheap paper gasket issue.

I love everything about that quad. Looks like a blast in the snow

Thank you. It is always a blast to ride. I cant wait to take it to a mx track. I wish I had a newer engine though 89-04. This 87 just doesn't have the wow factor that my 98 had. It's still better than a 250 just not as powerful as the newer ones.

[motopunk]

Normally I use Athena gaskets but I had an extra top end kit laying around from the PO. The head and jug surface is flat. I check them every time they are apart. Head was properly torqued and checked frequently. I think its just a cheap paper gasket issue.

I love everything about that quad. Looks like a blast in the snow

Thank you. It is always a blast to ride. I cant wait to take it to a mx track. I wish I had a newer engine though 89-04. This 87 just doesn't have the wow factor that my 98 had. It's still better than a 250 just not as powerful as the newer ones.

the 86-88 engines are also powerful, but i think the newer exhaustvalve makes the wow-effect on the 89-2004 k5-engines...
but you can update "goatzilla" anytime with the newer engine, if you find one..      

[Goat]

My 98 was always pulling the front wheel up anytime the throttle was opened at all. The 87 just spins the wheel. Even in the bike frame. Someday I will find a basket case 89-04 engine for a decent price and re-build/mod it and then pull the 87 out and sell it.

[sandblaster]

Hey goat.
I wonder if you might have two problems causing the wheel spin.
First is the drive tire diameter.
I would guess you would have to gear it to the moon with the small rear tires to keep it from being under driven.
Then, what about rotating mass of the fly wheel.
I believe the fly wheel for the 87 is a lot lighter then it is for the newer 500's.
Can you tell me the sprocket sizes front and rear are, as well as the rear tire diameter?

[Goat]

Tire size is 20x11x9 for the sedonas which is what I run 99% of the time. 13t front sprocket and a 41t rear. I could care less about top end as I rarely have the room to go that fast so I gear it down for more low end. Speed calculator says it does 65.8 @ 5799 rpm with this gearing combo in 5th with max engine rpm at 7000.

[sandblaster]

No wonder your burning the rear tires off that thing 

[Goat]

lol Think I should up the front to a 14 and do what with the rear?

[sandblaster]

I'd do the 14 first and leave the rear alone for now.
Fronts are cheap 
I might even do a 15 if I thought it was still too low..

[Goat]

I'll have to dig through my sprockets and see what I have. It's nice having a bunch of different sizes that fit both quads. I have a 11t on the kdx. Dont remember what the rear is atm I think it's a 38t rear.

[sandblaster]

Yeah, I have a few parts laying around as well 

[Goat]

I wish I had a lot of the parts you have just laying around

[Motorrad]

K5 is faster when loaded vs revving