The outer edge of the right hand side transfer port can clearly be seen to have absolutely no gasket surface that can mate with the transfer port of a standard small block crankcase mouth.
A previous owner of this cylinder has hacked the transfer ports presumably because he read somewhere that there can be power gains by opening up the transfer ports on cylinders and crankcase mouths ...........or perhaps because someone bought him a Dremel for Christmas
Its a great pity that those people who talk about porting work don't include a few lines of text giving owners some basic instruction about how to go about such work .
When carrying out any porting work on cylinders and manifolds and crankcases its essential that ports are matched together first to clearly mark safe maximum limits to ensure that after the ports are opened out there is still sufficient gasket surface area left to form an effective seal . Its not rocket science ..
A simple method is to spray paint a base gasket and mount the cylinder and head . When the cylinder is removed you should have a clear indication on both sides of the gasket of the extent of the mating surfaces of both cylinder base and crankcase mouth . This will show the limits of how much material can be safely removed from the ports.
One of these days It will finally dawn on me that there is no such thing as a 'bargain' or 'saving money' by purchasing someone elses used parts on eBay. What you are frequently buying is someone else's problem component that is either damaged , poorly constructed or simply doesn't work as intended.
If the previous owner of this 185cc cylinder kit is reading this I can only hope that, like me, he also wasted weeks of his precious time searching for the intermittent hard starting and poor running issue before he also did a leak down test.
Shame on you for selling the kit on to another fellow Lambretta owner
