Yamahaguy2008 Posted June 17, 2009 Share Posted June 17, 2009 Hello Yamaha-Freaks, i would like to check the compression of both cylinders of my XS400 SE (4G5) Year 1982.Can you give me data about the min/max parameter range.How high has the pressure to be....THX from WOLF...) PS: I am looking too for a pair of Mufflers in very good condition for that Bike.... Link to comment Share on other sites More sharing options...
Moderator drewpy Posted June 17, 2009 Moderator Share Posted June 17, 2009 Hello Yamaha-Freaks, i would like to check the compression of both cylinders of my XS400 SE (4G5) Year 1982.Can you give me data about the min/max parameter range.How high has the pressure to be....THX from WOLF...) PS: I am looking too for a pair of Mufflers in very good condition for that Bike.... YG2008, is that a DOHC bike? Link to comment Share on other sites More sharing options...
TylerP Posted June 18, 2009 Share Posted June 18, 2009 It should have at least 100 lbs. Better still upward around 150-170 lbs. Link to comment Share on other sites More sharing options...
Yamahaguy2008 Posted July 9, 2009 Author Share Posted July 9, 2009 It should have at least 100 lbs. Better still upward around 150-170 lbs. Thanks for the data...the last measure was 130 left and 160 right...i hope the difference is not too much.... Have a great day WOLF Link to comment Share on other sites More sharing options...
Joshua2 Posted July 9, 2009 Share Posted July 9, 2009 Have you tried a comp test after putting a very small quantity of oil down the bore via the plug holes? If there is a marked increase in pressure it may just be the vales need re seating. HTH J Link to comment Share on other sites More sharing options...
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