Hey everyone, I came across a pair of ported cylinders for my RD250E, but the seller on eBay isn't very helpful in explaining exactly what's been done. From the photos, I can see that the transfer ports are massive, and it looks like they've gone all the way down to the steel liner. He said that the exhaust port has been lowered, which I find strange unless the piston moves below the exhaust port in a stock engine. I know these photos aren't the best and don't show the intake or exhaust, but does this look like a bad porting job? The intake looks to have be widened as the intake window on the piston looks rather large. There's something about those transfer ports that look kinda weird. Can someone explain what effect enlarging the transfer ports has?