is it a good idea to change em for a new set? will i need to? my 95 gsr has 85,000 miles..slight noise only in the mornings only when its really freakin cold outside for about 3 seconds..i live in chicago..i just bought it and i know the previous owner drove it hard..there some cheap ass oil in there right now..i think from murrays auto parts and a no name filter..should i change over to synthetic? before i do the drastic rod bearings...thanks!