Blastzilla

[MotoReno]

I have a 2001 Blaster that needed a top end job that I picked up for some short cash (from a shady look'n guy).

After doing some research in the strength of the lower end of the Blaster engine, I decided to sell it ($200), and head in another direction.

Not wanting to mess with liquid cooling, I decided to go with an air cooled 1975 KX 250 engine that I had kicking around.

First step is to cut the down tubes and engineer the engine mounts.

 

[brandoz28]

cool stuff man, sounds like you've got a plan. can't wait to see some pics of some progress

 

[motoman9911]

I was let down. I was expecting a zilla engine in a blaster.

 

[MotoReno]

I was let down. I was expecting a zilla engine in a blaster.

That would be something I:I

The engine I have is .070 over so it is a 270cc engine or so. Should move!

*EDIT type o*

 

[bagds10]

yup motoman9911... i was expecting the same thing.

 

[MotoReno]

.070" = 262cc engine

I think you're right.

* EDIT *

 

[MotoReno]

yup motoman9911... i was expecting the same thing.

I should have taken a poll to name my project first. 8-| Everyone is getting confused with the old Quadzilla.

 

[motoman9911]

Poll time........

 

[motoman9911]

I concur. Head work will not chance the cc's of the engine.

 

[motoman9911]

That's not how you get engine size moto. Spark plugs, head size, gasket thickness, and other stuff doesn't affect it. It's bore/4*pi^2*stroke.

 

[brandoz28]

it is [pi(bore/2)]^2*stroke

radius is 1/2 of the bore diameter

A cylinder with radius r units and height h units has a volume of V cubic units given by

 

[MotoReno]

Have a look at this link: http://en.wikipedia.org/wiki/Engine_displacement

Here is one on compression ratio : http://en.wikipedia.org/wiki/Compression_ratio


The engine displacement and compression determines the power of the engine.

 

[motoman9911]

Oops, I typed it wrong.

 

[MotoReno]

me smart than you moto, me prove you wrong again.

Um................ sure.

 

[MotoReno]

Admin, Could you clean up the thread? It was to be about my project not turd.

 

[motoman9911]

This thread is kind of funny haha. It's better if you don't edit your posts though.

 

[MotoReno]

you angry because me smart than you?? you change post after me prove wrong.

If you go back and look at the thread you'd see that I said you were right about the displacement calculation. Thing is you missed my point about the engine having added power because of the added displacement and alteration to the compression.

Your posts are not adding value of the thread. As such your acting like a troll.

 

[phragle]

A couple of thoughts, not trying to discourage you, just offer insight...
An aircooled old 250 mx motor would probably be pushing 25~30 hp. .70 over is probably about on its last bore.. so one problem and you may eitherhave to resleeve or get a new top end. Also the bottom end and gearing are set up for much different loads and gearing. no counterbalancer so it will vibrate and the pipe may be an issue. also the kx has no provision for lighting.

Your doing a lot of work to make something that will in all likelyhood not be much faster than a well built blaster motor. The blaster bottom end isn't the greatest, but I seriously doubt the old kx bottom end is any stronger.

 

[motoman9911]

Why did you take down the pic of yourself with those DSL?

 

[2000blasternewb]

the thread title implied that this should be a big motor swap, but wheres the big motor

anyways good luck on the swap.