The engine number C114 1044 79 RM80 indicates that the Suzuki RM80 was produced in the year 1979. Suzuki typically used a combination of letters and numbers in their engine identification codes to denote the model and production year. Therefore, based on the number provided, the bike is from 1979.
ASTM C114 is a good reference for determining free lime
C100 LXI H C200 21 ; Load the HL register pair immediately C101 00 ; C102 C2 ; C103 MOV B M 46 ; Move the memory content (Total number of data) in to B register C104 MVI C 00 0E ; Initialize the C register with 00 H C 105 00 ; C106 SUB A 97 ; Clear the ac cumulator C107 INX H 23 ; Increment the HL register pair (to get the next input data) C108 MOV A M 7E ; Move the memory content in to accumulator C109 DCR B 05 ; Decrement the B register c o n tent C10A INX H 23 ; Increment the HL register pair C10B ADD M 86 ; Add the memory content to accumulator C10C JNC C110 D2 ; Jump if carry = 0, to C110 H C10D 10 ; C10E C1 ; C10F INR C 0C ; Increment the C register content C110 DCR B 05 ; Decrement the B register content C111 JNZ C10A C2 ; Jump if no zero to C10A H C112 0A ; C113 C1 ; C114 STA C300 32 ; Store the accumulator content (sum) at C300 H C115 00 ; C116 C3 ; C117 MOV A C 79 ; Move the C register content to accumulator C118 STA C301 32 ; Store the accumulator content ( carry ) at C300 H C119 01 ; C11A C3 ; C11B HL T 76 ; Halt the exection