how do you test compression on a srx 700 my guage shows 0 when i pull it over. I know my guage is working cause I checked my ultra right after. I'm assuming you must have to do something with the powervalves to get a reading???
ottawaair
New member
I'm assuming your sled is blown up then. Better check again.
step 1- remove spark plug
step 2 screw in gauge
step 3 - hold throttle open
step 4 - pull recoil 4 times
step 5 - read gauge
step 6 - if reads zero- you're f***ed
step 1- remove spark plug
step 2 screw in gauge
step 3 - hold throttle open
step 4 - pull recoil 4 times
step 5 - read gauge
step 6 - if reads zero- you're f***ed
bluemonster1
LIFE MEMBER ONLY ONCE!!!
he's hooped then!!!!!!
daman
New member
shes problaby wraping back around to zero,,lol, no really it don't sound good
put your thumb over the hole feel anything?
put your thumb over the hole feel anything?
YAMMIEGOD3:16
Active member
GAUAGE READ 0 ? EVEN A BURNED DOWN MOTOR WILL READ SOMETHING. DON,T SOUND RIGHT. 3:16 (yammie tony)
bluemonster1
LIFE MEMBER ONLY ONCE!!!
maybe one end not hooked up to the gauge.... 
ottawaair
New member
when the top of the piston & 1/2 the ring are gone.., they usually about zero.
it still runs really strong I just did 100.33mph in 1000' with it I know its not blown up I just wanted to check compression. it has to be something with the power valves not letting it build compression or something else not letting it build compression cause it runs flawlessly. if it truely was zero compression it wouldn't run.
Last edited:
oh it would run...just on 2 cylinders...we melted a Viper cylinder down last year...and it still ran...put your thumb over the hole and pull it over...do you feel anything?
all cylinders read zero
9801srx
Member
the check valve in your guage must have stuck or something.100.33mph in 1000' you got alot more than 0 for compression.i'd try it again .there's nothing to stop it from building preasure only blown pistons and they don't do 100mph.lolSRX700guy said:
my thoughts exactly!! I will have to try it again
ottawaair
New member
something not right there. you could take the powervalves completely out of the engine & still get compression. It deosn't start building until piston is above port anyway.never heard such nonsense.
Ltprose
New member
YAMMIEGOD3:16 said:
I just burned up the PTO on my MM. #2 & 3 read 125, but #1 read zero, so it happens when you put a big hole in the piston I guess....
I don't know what the deal is I will have to check it again