Compression on 800r
- Thread starter hounddog
- Start date
L
lightening800
Well-known member
tt
thats about right for the 07 but my 09 i just checked it has 165psi both holes no bull i couldnt believe it too, now what is the purpose for the aftermarket heads if doo already bumped the compression up in 09????
thats about right for the 07 but my 09 i just checked it has 165psi both holes no bull i couldnt believe it too, now what is the purpose for the aftermarket heads if doo already bumped the compression up in 09????
S
snow_freak
ACCOUNT CLOSED
ya 135 is a little low if your up for it it would be a good idea to take the carbs and reads off and take a look at the piston, you could have got some snow ingestion and the intake side of the skirt could be all scared up, or take the tuned pipe off and look at the exhaust side of the piston for over heating scaring.
I just checked mine and it was right there around 135 at about 1200 ft elevation. Stock ranges from 138 to 145 at this elevation. Also gauge variance can be + or - 10 psi or so. If they are both within a few pounds I wouldn't worry about it.
is that just with you pulling it over. seems really high
I would say your gage is messed up. That would require race gas mix more than likely.
Does anybody know what the stock compression on the 09 800 is supposed to be?
F
fassteddie
Well-known member
09 stock 135. with s.l.p. 3000-6000 head 162 readings @ 300 ft. cold 6 pulls open throttle. 2 different gauges. also measured squish. stock .058. s.l.p. .045. stock chamber cc,s 38.9. s.l.p. 3000-6000 34.2. measured using flat plate. more info then needed but what the hell!
man that is tight squish on that SLP head. Crazy.
