compression - SV650.org

29-01-09, 09:47 PM

can anyone tell me the correct compression i should be getting in a 99 650?i have white gue on the oil cap so done a compression test to see whats going i was reading 125psi on rear and 120 on front,,someone told me this correct but one manual i was reading said i should be getting 216psi or something,,anyone know ?

embee · 29-01-09, 10:31 PM

Did you have the throttle open or closed? Was it hot or cold? Was it cranking at a good speed or only slowly? Was the other spark plug out?

Manual says
- fully charged battery
- warm engine
- plugs out
- throttle open
- crank for a few seconds

- standard 213psi (1500kPa)
- limit 156psi (1100kPa)
- difference between cyls 28psi max (200kPa)

Sid Squid · 29-01-09, 10:45 PM

You'd get those numbers from a good engine and a shut throttle.

30-01-09, 02:48 PM

engine was cold and throttle closed,,,i will try with a warm engine and open throttle and see what happens
cheers

29-01-09, 09:47 PM	#1
kingy916 Guest Posts: n/a	compression can anyone tell me the correct compression i should be getting in a 99 650?i have white gue on the oil cap so done a compression test to see whats going i was reading 125psi on rear and 120 on front,,someone told me this correct but one manual i was reading said i should be getting 216psi or something,,anyone know ?

29-01-09, 10:31 PM	#2
embee Member Mega Poster Join Date: Jul 2003 Location: Warwickshire Posts: 2,801	Re: compression Did you have the throttle open or closed? Was it hot or cold? Was it cranking at a good speed or only slowly? Was the other spark plug out? Manual says - fully charged battery - warm engine - plugs out - throttle open - crank for a few seconds - standard 213psi (1500kPa) - limit 156psi (1100kPa) - difference between cyls 28psi max (200kPa) __________________ "Artificial Intelligence is no match for natural stupidity" Last edited by embee; 29-01-09 at 10:42 PM.

29-01-09, 10:45 PM	#3
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: compression You'd get those numbers from a good engine and a shut throttle. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

30-01-09, 02:48 PM	#4
kingy916 Guest Posts: n/a	Re: compression engine was cold and throttle closed,,,i will try with a warm engine and open throttle and see what happens cheers

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