it does give the old girl a bit of life every now and then
plus it helped start the bike after it had been sitting for a few months outside, and a few more previous years in a rubbish tip...but after all said and done, a good tune up will solve most of the starting issues.......for the bike anyway............great for the lawnmower and whipper snipper - they don't get regular servicing until they break so I tend to use a bit of SYB every so often..
it's just like brylcreem --- a little dab will do ya............