hi guys i've been using my bike for almost 2months 80cc, my normal speed at flat ground 55kmh, my oil mixture at my first 4 liters is 16:1, and after that i used 20:1 and now im doing 25:1mixture ,i kept my bike in my garage about 3days coz its raining ,and when i use it i notice that something wrong with my engine, when i start it it has scratching sound inside and i run it at a distance of 8kms my normal speed went down to 40kmh, i check the cylinder head 1 of the 4bolt was loose i remove all the bolt and remove the cylinder head i see some slight scratches at the cylinder bore hairline scratches can be felt by my fingernails ,and when i put it back on i put red loctite and thighten the 4bolts about 10ft lbs and now it backs to normal works the same as before 55kmh, Now the question is does it affect the engine perfomance when i run my loose compression engine about 8kms at a speed of 40kmh, im confused about what gonna be the problem of my engine in the future, coz i run it loose compression