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View Full Version : 1985 250r Help


redrider99
06-23-2009, 02:42 PM
OK rebuilding topend..Have a clymer manual and theres no compression numbers for my bike its just black. I have an oem honda service manual and its says compression from 170.7-199.1 does this seem high to anyone???
shadix518
06-23-2009, 04:01 PM
no thats factory specs. it will be different if your putting a different piston or boring out the cylinder thou
redrider99
06-23-2009, 10:42 PM
It's got honed but still had a spot the hone never really touched so its getting bored over .20 with a wiesco piston kit
shadix518
06-23-2009, 10:58 PM
if my memory serves me right with a bore.....but it depends is it a flattop piston?
redrider99
06-29-2009, 11:26 AM
I dont believe the piston is a flat top. I'am pretty shure it has a slight dome to it. Its a weisco pro lite
shadix518
06-29-2009, 12:03 PM
well if it has a dome top it will be very close to factory if not a little higher if my memory serves me correctly