I bought my motorcycle last year and had received all package of documents at once.

Among of documents i found small square piece of paper on which are printed big figures 2552.

I think you met this document it frequently fasten with motorcycle.

Whether I should change this document this year?

And what is this the document?

the tax sticker needs to be replaced every year. its 2553 now, so 2552 is expired already.

to get a new one

bring reg book (blue small book) and bike to an agent or Land Transport Department

pay

1, insurance

2. road tax

then your new tax info is printed in your book, and you get a new sticker valid for one year from the previous one expired.

I think Bike books are Green (mine is)

Depending on a few factors you may also have to have a bike inspected. (I think it is 60 baht here in Chiang Mai)

I think Bike books are Green (mine is)

Depending on a few factors you may also have to have a bike inspected. (I think it is 60 baht here in Chiang Mai)

absolutely right, bike books are green. car books are blue. bikes less than 5 years old dont need inspecting for annual insurance/tax.