Yamaha Mini Enduro

   #1  

AV8R62

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central Indiana
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I am not sure if this is the place to ask but their is a lot of brain power here,
Can anyone tell me what the compression should be on a Yamaha 60 JT1 dirt bike? or tell me where to find out.
 
   #2  

Kyle_in_Tex

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I don't remember but it isn't much. 2 strokes are only around 7:1 compression on average. If you are rebuilding, check the cylinder for scoring. Rebore and install oversize piston and rings if scored.
 
   #3  

MossRoad

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Why don't you google

"yamaha mini enduro compression ratio"

I got a lot of hits. Looks like 8 to 1.
 
  
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#4  
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AV8R62

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Oct 16, 2003
Messages
72
Location
central Indiana
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Kubota L4200
to be more specific, I am loking for PSI not ratio
 
 
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