Yamaha Mini Enduro

[AV8R62]

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.

 

[Kyle_in_Tex]

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.

 

[MossRoad]

Why don't you google

"yamaha mini enduro compression ratio"

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

 

[AV8R62]

to be more specific, I am loking for PSI not ratio