I've given up the polishing for now. I want to get this thing together!!

At this point, I don't care what it looks like, I'm just ready to ride!!



Here is where I am now:

I had some pressure in the cooling system, so I pulled the head, and sure enough you can see where there are 3-4 spots along the gasket where the cylinder pressure was getting into the water jackets. Maybe even more now that I look at it.

Gasket

So off to the machine shop. My question is, should I have them deck the cylinder AND the head or just the cylinder? I haven't heard of anyone having a warped head, but I guess it can't hurt. (Maybe get me up near 13:1) :icon_biggrin:

Either way, here she sits waiting...........

Bottom end

 

it wouldnt hurt to have them both decked. not sure on a 4 stroke but when you deack the head will you get more compression out of it ?

 

Yes for every 5/1000th's of an inch taken off, you gain 3/10th's of a point of compression.

I will most likely get both done for piece of mind. I'm at 12.5:1 now, and I don't mind going up to 13:1

 

so now that u did all that work your probably sick of the atv now. So name the price and i will take it off your hands. ITs the least i can do for a family member. no no dont thank me. Its ok. lol nice work. best atv i have seen!!!!!! i want vid of that bad boy in action!!!!

 

Well, I can never sell it, as it was my brothers.......it will stay in the family forever, sorry.


Another reason I could never sell, is because I have a bazillion $$$ in this damn thing!! I could've bought a brand new Car for just what I have in parts in this thing!!!

 

She's looking pretty sweet, Blackkawi! You've done an amazing job on it, your brother would be proud!

 

dont that just suck. i could of out right bought my car for what i put into my banshee.

 

Awesome man... Ya I would shave 'em both. You're all ready there. How much can you shave without the valves hitting the pistons?? around 20/1000 ??

lol lol. I'm guessing that's pretty fast

 

I'm going to go ahead and say 20/1000th's sounds about right.

Right now I run the DRZ-E (dirtbike) base gasket from suzuki (the KFX400 motor is based on a suzuki DRZ400 dirtbike) that is 0.010" thick. I did this to raise the compression 0.9 points.

The stock base gasket for the KFX400 is 0.027" thick.

If I do get too close, I can switch out the base gasket back to the stock one and gain an additional 0.017" thickness.

 

It sounds like you've got her figured out. Man, I can't wait to see this thing put together.. When you get done, do you want to work on mine!!!!!