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View Full Version : Big Red compression?


ATCLUVR
06-07-2010, 02:35 PM
what should the compression be on a 1985 Honda Big Red 250es
MonroeMike
06-07-2010, 02:40 PM
170-185 psi

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http://72.52.143.80/~trikes/Manuals/ATC%20manuals/atc250es-85-87servicemanual.pdf
ATCLUVR
06-07-2010, 03:05 PM
Thanks Monroemike, looks like I got a problem, I'm at 125psi
ailll1
06-07-2010, 04:42 PM
I'd say 125psi isnt that bad.
My SX ( same engine) has 120psi and runs like a top.
Have problems with your engine?
ATCLUVR
06-07-2010, 05:56 PM
I'd say 125psi isnt that bad.
My SX ( same engine) has 120psi and runs like a top.
Have problems with your engine?

Dont know if it has any problems yet? I bought it as a project and was just doing some preliminary tests. It starts with starting fluid, I'm waiting on a new tank and petcock and then I'll see how it runs