07 GSXR 600 white smoke and low compression
I live in Florida and I have a 2007 GSXR 600 with 23,000 miles. I am new to the website and fairly new to riding. I bought the bike about a year ago and the previous owner had it tuned for 93 octane and removed the cat converter to install a shorty exhaust. It ran great at first but now I am seeing some issues. I took my bike to the shop early July for a valve adjustment (wasn't sure if it was done previously and I felt like it was running sluggish). The mechanic measured the gap but it was within limits (some right at the minimum), so he just changed the spark plugs for me. I have had some white smoke issues that would occasionally build-up in the past but the smoke got much worse about a week after the shop. It wouldn't happen immediately, it would occur when the bike was around normal operating temp and it was a light to thick white smoke that was coming from the front of the bike around the headers. I later noticed the exhaust header bolts were loose and had oil dripping from them. I dropped the radiator (flushed the coolant at the same time) and replaced the metal bushings in the headers and then torqued the exhaust header bolts to spec. I also flushed the oil and I didn't notice any milky or frothy consistency, so I changed the oil and filter. I haven't noticed any more oil leaking and I did this about 2 weeks ago. I rode it a few times but nowhere far and I am still noticing smoke, only it is thinner white smoke that comes and goes. I did a hot compression test today and all cylinders were below standard (but above the minimum 142psi). 1- 165, 2- 170, 3-170, 4- 175. The standard in the book is somewhere around 185 - 245. I did it again with oil and the numbers were exactly the same. The book says it's a leaky head gasket or worn valve seals. Oil level hasn't changed and neither has coolant level. No overheating issues, Oil does not smell funny and spark plugs look good to me (ill attach pics tomorrow). I did find a decent amount of oil under the air filter housing when I removed it to do the compression test (engine was hot and I just finished riding). Looking for any advice before I take it to a mechanic and get raped. Thanks in advance guys and let me know if I missed any details you guys need.