Looks just like the Harbor Fright one that I use. FYI it will also work for leakdown tester on 2smoke. Drawback is you have to remove tank.But Be creative, using PVC caps for intake boots, drill hole slightly smaller than threads on adapter and force thread adapter into cap. Use 3Bond or permatex #2 on threads. Stock bumper end caps or rubber plumbing caps for exhaust. Nice part is double redundancy with regulator. Turn compressor reg down to 10#, back tester all way out and slowly adjust up. Nice part is if you have clip on tire chuck you can add air and spray soapwater at same time
First thing to check is your tester. No leaks in connections, PVC caps to boots, Rubber caps on ex, spark plugs. After that it's just gaskets, seals, intake boots. Flex boots to double check them.
Dish soap and water, 25/75 to 50/50.
Put trans vent end in glass/cup of water to test case seal and right crank seal. IF you get bubbles, pull clutch cover and test right seal. They can leak at the collar/keyway on crank end.