Yr2 boys NOTORIOUSLY find writing hard! Things that I found helped ds1 (who did find handwriting in particular hard, but ended up with 2a in Y2 SATS, but more importantly now loves writing;)
LOTS of colouring in of CBeebies printables - see how neatly he could do them
Wizard Whimstaff handwriting book
The real killer idea was to staple about 5 pieces of A4 blank paper together, rule about 6 lines on the top of each piece, then he wrote his own books, with an illustration underneath each page of writing. This really inspired him to write more, and he wrote quite a few 'books'.
Do the same with the paper, but divide into columns and get him to write a 'newspaper'.
My DS had problems,he is also left handed,so this added to the problem.
I used the Letts Handwriting Books with him,also gave him two sentences to write out each evening,and my parents "played restaurants" with him,where he was the waiter and had to write down their orders on a writing pad.
Over the year his handwriting vastly improved.Alot of the problem was that he started the letter in the wrong place,so this meant it wouldn't "join" the next one properly or neatly.The books showed him where to start them properly.
DS is now 12,i wouldn't say he has the neatest/nicest writing,but is level with his classmates now.