Sean Collier's "The Beast" Engine in for a refresh and mods.
- Sandblaster
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Sean Collier's "The Beast" Engine in for a refresh and mods.
As some will remember we had this engine in about 9 months ago.
We were told under no uncertain terms not to improve the performance.
So here was what we were told.
Make it shift good, and try to make it survive for a while longer.
The plating on the cylinder was worn out around the exhaust port, the piston was junk, and all the shift components were extremely worn out.
So, we replaced all the worn out parts with used parts that were still in factory spec.
We cleaned everything, polished a few parts, replaced all the bearings, seals, gaskets, o-rings, snap rings, and even tossed in a used piston with new rings.
After it was done the engine ran very well but it still had worn plating that desperately need to be replaced.
The crank was pretty worn as well..
Also, the power on this engine was explosive which makes it difficult to ride for 30+ minutes against other pro riders
Oscar put an hour meter on the bike the first time we had it.
When we got it back it had 10.8 more race hours on it.
Frankly I'm shocked it held together
Our goal this time is to rebuild the cylinder and head to the same specs as the engine in Groot.
New plating, porting, piston and crank are all in the works, along with some special mods that we will get too later
We were told under no uncertain terms not to improve the performance.
So here was what we were told.
Make it shift good, and try to make it survive for a while longer.
The plating on the cylinder was worn out around the exhaust port, the piston was junk, and all the shift components were extremely worn out.
So, we replaced all the worn out parts with used parts that were still in factory spec.
We cleaned everything, polished a few parts, replaced all the bearings, seals, gaskets, o-rings, snap rings, and even tossed in a used piston with new rings.
After it was done the engine ran very well but it still had worn plating that desperately need to be replaced.
The crank was pretty worn as well..
Also, the power on this engine was explosive which makes it difficult to ride for 30+ minutes against other pro riders
Oscar put an hour meter on the bike the first time we had it.
When we got it back it had 10.8 more race hours on it.
Frankly I'm shocked it held together
Our goal this time is to rebuild the cylinder and head to the same specs as the engine in Groot.
New plating, porting, piston and crank are all in the works, along with some special mods that we will get too later
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
- Contact:
Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
I received the engine today..
It just needs a minor tune up
On the pressure washing mat.
It just needs a minor tune up
On the pressure washing mat.
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
Ready to crack here open...
I love when a polished part looks like this nearly a year of racing later..
I love when a polished part looks like this nearly a year of racing later..
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
The bad thing is... the exhaust port is not looking any better...
Here is a vid showing the play in the piston..
https://www.youtube.com/watch?v=VUTfanjjw08
Here is a vid showing the play in the piston..
https://www.youtube.com/watch?v=VUTfanjjw08
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
I already know the port timing so I don't have to worry about that.
But I still need to get the head squish calculated so I need to get some additional measurements..
More to come...
But I still need to get the head squish calculated so I need to get some additional measurements..
More to come...
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
I started doing the rough porting on the cylinder today..
As you can see, this thing was ready to blow
As you can see, this thing was ready to blow
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
We are going to toss the stock carb and use a 97 KX250 carb
before
After
before
After
If bikes are for kids I'll never grow up.
- Sandblaster
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- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
I spent a bit of time doing the rough porting the other day..
Today, Jason put his hand to the port tools and began to massage the cylinder..
No gloves, no eye protection... Nice Jason... Nice...
Today, Jason put his hand to the port tools and began to massage the cylinder..
No gloves, no eye protection... Nice Jason... Nice...
If bikes are for kids I'll never grow up.
- Sandblaster
- Posts: 6313
- Joined: Thu Jun 07, 2012 3:50 pm
- Location: Eugene, OR
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Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
Jason has a bit more roughing is done..
If bikes are for kids I'll never grow up.
Re: Sean Collier's "The Beast" Engine in for a refresh and mods.
Hey
Why hasnt sean been racing the kx 500?
I see at mammoth he raced a KTM
Why hasnt sean been racing the kx 500?
I see at mammoth he raced a KTM
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