Does anyone know what the compression should be on a 84 V-Max 540 ??
depends soley upon the guage and thread adaptor used but 115-120# would be close, more importantly that they both show the same from side to side. if a long hose,wrong(short) thread adaptor is used your reading will be lower, however not "wrong" it all comes down to the tester being used.
compression
I just bought a beater. 1987 Vmax 540 and with a long hosed guage I have 130 lbs. I ussually figure another 5 to 10 lbs more because of the volume in the hose. This is the only 540 I have ever checked.
I just bought a beater. 1987 Vmax 540 and with a long hosed guage I have 130 lbs. I ussually figure another 5 to 10 lbs more because of the volume in the hose. This is the only 540 I have ever checked.
My tester has a hose about 18" long. I'm getting around 108 pto and 112 mag. Sled has about 2400 miles on it. Maybe it's time for freshen up ?? I've had the sled for about 2-years and it's really clean but haven't ridden it. Needed a lighting coil and a primary clutch which I've finally gotten done. I think I'll just ride it and see how it runs. It's a twin to my first "modern era" sled from back in the day.... Came off a 73 GP 292 back in 87 and then it felt like an absolute rocket...! Nice to have your "first sled" again.... Thanks for all the input.... Howie
Vmax540
VIP Member
Very, very important on the 540 to keep the top end fresh especially, with the chrome bore you don't want a scored cylinder or worse. Most I have checked were in the 115-135 lbs range. Visit http://www.vintagevmax.com/
YAMMIEGOD3:16
Active member
MY VMAX IS EXTREMELY FRESH. I,LL CHECK IT FOR YA AND POST. 3:16 (yammie tony)