05 Yz 125 Top End Swap?

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fritzfab

Member

Jul 19, 2010

3

0

• Aug 6, 2010

• #1

I have a 05 yz125 with the athena 144 top end... no head gasket problems yet(fingers crossed). But what I'm wondering is if it is possible to swap a complete top end from an 04- earlier yz to an 05, if I decide to go back to the 125cc?

 

F

fritzfab

Member

Jul 19, 2010

3

0

• Aug 11, 2010

• Thread starter
• #2

Any thoughts, anyone?

 

S

skos

Member

Jan 24, 2009

52

0

• Aug 13, 2010

• #3

fritzfab said:

I have a 05 yz125 with the athena 144 top end... no head gasket problems yet(fingers crossed). But what I'm wondering is if it is possible to swap a complete top end from an 04- earlier yz to an 05, if I decide to go back to the 125cc?

Click to expand...

The Bore x Stroke are the same but the Compression Ratio on the 2004 is 8.7 – 10.8:1 and on the 2005 is 8.6:1 – 10.7:1

 

Pete Payne

MX-Tech Suspension Agent

Nov 3, 2000

933

38

• Aug 19, 2010

• #4

The 05 was an all new engine and will not interchange with the older stuff, But you can use the newer stuff -06 07 08 etc.