Can anyone give me suggestions or advise? I want to gain 8-10lbs of muscle and I want more definition.

I am 26yrs old 6ft 1in, 165lbs

I started lifting weights about 18mo ago and have seen some growth and definition (gained 5 lbs); HOWEVER, I am not satisfied with my gains in terms of both size and cut. I think after 18 mo of hard core training I should be bigger. What should I change?

Here is what I do, and have done for 18 mo.

Cardio:
Mountain bike 5 or 6 days a week for about 1 hr.

Weights:
Monday- Chest, Triceps, Hamstrings
-DB bench press 4x8-12 increasing weight
-DB incline press 4x8-12 increasing weight
-DB decline press 4x8-12 increasing weight
-cable flys 4x8-12 increasing weight
-cable or DB kickbacks 4x8-12 increasing weight
-?cable/rope push downs??? 4x8-12 increasing weight
-lunges 4x8-12 increasing weight

Tuesday- Back, Biceps, Quads
-rows 4x8-12 increasing weight
-lat pull downs 4x8-12 increasing weight
-shrugs 4x8-12 increasing weight
-back extensions no weight
-DB curls 4x8-12 increasing weight
-DB hammer curls 4x8-12 increasing weight
-BB curls 4x8-12 increasing weight
-preacher curls 4x8-12 increasing weight
-leg extensions 4x8-12 increasing weight

Wednesday- Shoulders, Calves
-arnold press 4x8-12 increasing weight
-front/lateral raises 4x8-12 increasing weight
-reverse flys 4x8-12 increasing weight
-DB military press 4x8-12 increasing weight
-Calf raises 4x8-12 increasing weight

Thursday- I alternate and follow Monday or Tuesday’s routine.


I use no supplements and pretty much eat anything I want.

Thanks