450 exc piston

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450 exc piston

Post by steve on Thu Nov 24, 2016 7:22 pm

On ams website there 2 listed anyone know witch on?
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Re: 450 exc piston

Post by mizzed on Thu Nov 24, 2016 7:28 pm

1 is standard size,
2 is 0.05mm bigger

Trevor Pope recommended using the 2 to me.

its stamped on the back of the barrel either 1 or 2 if you want to match it exactly.

I've got the 2 in mine on a 1 barrel and its fine.


Last edited by mizzed on Thu Nov 24, 2016 7:29 pm; edited 1 time in total
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Re: 450 exc piston

Post by JTM525 on Thu Nov 24, 2016 7:29 pm

steve wrote:On ams website there 2 listed anyone know witch on?
The most expensive one Laughing
What's the options?
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Re: 450 exc piston

Post by dai 530 on Thu Nov 24, 2016 7:29 pm

It depends on what size cylinder is fitted on the bike it's probably a 1
I usually put a no 1 back in on the 1st piston change and a no 2 on the nxt one 
The only real way is to measure the bore 
I think on the rear of the cam chain tensioner housing the cylinder size would be stamped on there
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Re: 450 exc piston

Post by steve on Thu Nov 24, 2016 7:36 pm

260 hours what you think 1 or 2 ?
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Re: 450 exc piston

Post by mizzed on Thu Nov 24, 2016 7:57 pm

1
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Re: 450 exc piston

Post by mizzed on Thu Nov 24, 2016 7:57 pm

mines got at least 600+ hours on it i reakon
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Re: 450 exc piston

Post by dai 530 on Thu Nov 24, 2016 8:05 pm

I put a one in mine at about 250 hrs but probably could get a.way with a no 2 just check to see  what size cylinders on there 1st
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Re: 450 exc piston

Post by steve on Thu Nov 24, 2016 8:13 pm

Can you change the cam chain without splitting the bottom end?
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Re: 450 exc piston

Post by dai 530 on Thu Nov 24, 2016 8:50 pm

Yes Steve you might have to pull the flywheel off you will need a flywheel puller I think it's a 27×1mm
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Re: 450 exc piston

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