stock flywheel

ok ive searched all over the place to find out how much a stock B18C7 flywheel weighs????

and what i want to know is how much can i lighten it

"about 6.5" kgs apparently. Sorry i had a stock one and i should of weighed it for the database sake.

But ~ lighten it as much as is safe. It is a cast piece , the more you machine otu of it the more possibility of uneven surface etc.
IMO get a proper lightweight item like a TODA or exedy flywheel.

B18C7 flywheel = 7kg's

so what is a safe weight to lighten it to