I adjusted the lash on my 20r last weekend, and it seems to have increased my milage by about 10% ( judged solely by the position of the gas gauge after a set number of days of commuting )

Usually by now the gauge reads about 1/4 tank, but it's only down to about 1/3.

I knew properly adjusted lash would increase performance and efficiency ( I do notice a smoother/longer power curve) but I didn't think that it would also cause an increase in milage as well. Am I just imagining things?