As per the title 
Happy birthday John
Have a Yam-Yammy Birthday buddy!
Happy Birthday dude! May it be the year of the fixed gearbox!
Happy Birthday Mate!
Keep on trucking 
Have a good one matey
Many happy returns
Happy birthday !!! 
I hope you get someone to play with your 'box.
H B’d
Happy birthday matey!
Happy Birthday buddy! Hope you had a good day and that motor isn’t too far off living again. 
Happy birthday John.
Cheers John