Super Jet Compression test

[kawi_mods]

just did a compression test on my 05 SXR and my bro's 90 SN SJ these are my results
Compression testsKawi
#1=136psi
#2=163psi
Wet test
145psi
165psi


Yama
#1=170psi
#2=170psi

what is everyone else getting on there ski's? the kawi spec is 185psi
Comments, advice pls!

 

[swannysxr]

Stock spec is not 185 psi, maybe 158. sounds like it's time for a top end rebuild.

 

[kawi_mods]

Stock spec is not 185 psi, maybe 158. sounds like it's time for a top end rebuild.

Owners manual says that it is... i was thinking i could just be a head gasket

 

[kawasaki9]

I have a 2011 sxr stock head and my comp is around 185 !
New top end on the kwaka !

 

[swannysxr]

I stand corrected, But my2005 SXR was not that high. no need for milling or aftermarket head then. Kawi mods, post your findings after you pull that head..

 

[tor*p*do]

solund sliek the kawi is going to need rings, wrist pin bearings
and a fresh hone at best

 

[kawi_mods]

Ya i'm thinking of pullin the head today ill keep you posted on what i find! if i have to hone then im just going to bore it too.

 

[rollin5150]

Sxrs were sold new with compression ranging from 150 to 180 psi. Mine was new at 150. Most shops tested every new ski. They sold the lower comp ones and kept the higher comp ones for racing.

 

[kawi_mods]

well took the head off and the gasket is screwed!
the Dome looks like its pitted, from factory... so im going to get a new head gasket and shave the head and see what numbers i can come up with

 

[kawi_mods]

i'll take more pic's tomorrow to much glare at night, plus i cleaned it up real nice :bigok:

 

[Proformance1]

For future ref, never look at the nnumbers. Only look at the difference in the numbers. if its 10% or more time to tear down. All gauges, IMO, read differently and are for comparison purposes only.

 

[standupguy619]

I was told stock SXR's should be at 170PSI or close to. comp gauges vary and so do the skis out the crate. 20 psi on your compression is no bueno homes! im almost in the same boat as you for mine as well mines at 147 even . top end time brother

 

[kawi_mods]

im going to shave the head and get a new head gasket and see what the compression is, the cylinders look good so im hoping its all good

 

[kawi_mods]

so its been a slow go on the head but got it done today! heres some pics, shaved 35 thou off

 

[kawi_mods]

so final results put the head on with a new gasket and tested it.... both cylinders 175psi now so i was luckily right on the head gasket being messed and found out that .035 off the stock head raises the compression 10psi

 

[Tyrant1919]

Well done.

 

[FearMyWrX]

Glad it was a cheap fix for you and no rebuild was needed.

 

[swannysxr]

Good to hear, should be a little snappier!

 

[kawi_mods]

ya pretty happy about it! should be a lot better than 135psi in cyl 1 and 165psi in cyl 2, was thinking on putting it in today but i still have ice burgs floating in front of my place :17:

 

[gaby7mm]

yeah,we got a big winter here in canada this year....i think we gonna start ridding only in june in quebec,lol!too much snow.