Glass blasting and boring T250J cylinders - Suzuki T250J

My T250J cylinders were in a pretty bad condition when I bought the bike. Other cylinder had deep grooves inside the cylinder sleeve which had to be removed by boring the cylinder to the next oversize. Bore was 55.00 mm (stock is 54.00 mm) before so the next step would be 55.50 mm.

Before I dropped the cylinders to my local machine shop to get bored I glass blasted them. I covered all the holes and ports in the cylinders were I didn't want the glass get into with a masking tape. I also removed rubber cushions from the cylinder heads. Both of them had 11 cushions between the cooling fins. Before blasting I used diesel fuel to get all the excess dirt out. Glass blasting is usually used for surface finishing so it might be necessary to sandblast the parts you are cleaning first. My cylinders had thick oil and dirt stains which needed to be sandblasted to get rid off. Below are some pictures of my overhauled Suzuki T250J cylinders and heads.

Suzuki T250J cylinder sleeve. Bore is 55.50 mm
(+1.50 mm/0.060" oversize).

Intake port of Suzuki T250J cylinder.

Exhaust port of Suzuki T250J cylinder.

Left side port of Suzuki T250J cylinder.

Right side port of Suzuki T250J cylinder.