KX Guru Racing

Motorrad

Top ring end gap. .014"
Botton ring end gap. .0155

on the money for a 90mm motor

evil

now if I could just find where I put the wrist pin. angry

Thanks to blaster for the measurement I needed of unmolested parts

Motorrad

jug is on. so I can now measure deck. to fine tune my head CC's to hit the compression ratio I want.

.048" positive deck hight.

Formula For Milling PistonsTop per lunati
(For 4032 material only)


Piston dome cc's to gram conversion: 1cc (volume) = 2.8 grams (weight)

This is a good way to remove excess dome without having to re-cc piston: Mill a small amount and re-weight piston until total reduction is reached.

Example:

A piston has 12.5cc effective dome volume. The desired effective dome volume is 10.5cc.

To remove 2.0cc, cut 5.6 grams (2 X 2.Cool from the piston dome.

sandblaster

It's gonna depend on the alloy content of the aluminum used.
Good luck finding that.
Since you know that, I can only assume that this is another test to keep me endlessly searching the internet for trivia that can't be found.
Darn you Motorrad!
So I suspect that the difference between your calculations using 4032 and the cast aluminum will be so slight as to be difficult to measure.
Then again I don't weigh things by their sub atomic densities.... very often

Motorrad

Perhaps you should start

Other head had been cut too much to get it up to the needed chamber cc

So

Started with a new head

And fresh off the lathe from being molested
sandblaster

Looks sweet as always....
Is that Dawn soap?

Motorrad

Yup. Best thing to happen to cylinder's and heads ever.

Motorrad

Missed my cc's a bit. So here we are making some cc adjustments. Now we are within 1/4 of a cc. Close enough for me
Head hand lapped to perfection. And very smooth gasket surface.

Trip through ultrasonic cleaner to get any compound from polishing or lapping off.

Had to take .037" off of dowel pin as to bit bottom out

Say by by
Magic custom gaskets. And checking squish clearance with the dial indicator.

Motorrad

.04725" squish clearance. If anyone besides blaster cares

81cr450

.04725 ? due to the cc recalc or on purpose, always thought .037 was the G spot. Care to quantify

just curious, if theres a practicality behind it, i have the 87 head thats already near .100 in the hole

16

demographic
Looking through this thread and unless I've missed it (its possible but I think I've had a good look through the thread) there doesn't seem to be much mention of the fact that the cylinder on the right (the Jeff Ward one) has one single window on each side of the main exhaust port instead of the two each side like the standard one.
Now if I remember right those ports go to the powervalve's and the Jeff Ward jug has basically removed the bridge between those powervalve ports and squared the holes up.

In this picture they are labled PV and the measurements are only measured off the paper top and not absolutely exact so don't trust them too much.

sandblaster

And a few other mods as well

Motorrad

That work wasn't done by team green.

There is A LOT of work done in that area if you know what to look for

timing set

Motorrad
Installing team green radiators after fabricating all the custom mounts again since I lost the others

Motorrad

Rads fitted.
they are 3 row. (stock is 2) and large capacity ontop of that.

Measured my coolant going in.

I have 25% more capacity than stock. (ontop of being 3 row)...


If the large impeller works out. with the other cooling system mods.

As Sandblaster put it.

My bike will be "pooping ice cubes out the pipe"

Motorrad

Two heat cycles in and all is well

Three heat cycles down and all is well.