Re: Petrol - petroil ??

Posted by hendred on
URL: http://silk-motorcycles.221.s1.nabble.com/Petrol-petroil-tp5001932p5002235.html

You will find the bearings in the technical section on the main site.  The main bearings are rolling element bearings.  The  problem of slip (if it really does happen) seems to be on 4 stroke engines with a more copious oil supply.  Plain bearing 2 strokes were made but as far as I'm aware a long time ago.  The synthetic oils mentioned here are designed for 2 stroke engines so I don't believe there will be a bearing slip problem using them.
The Silk engine has a plain bush little end and I believe the synthetic oil is beneficial here.  There have been problems with little end bearings and gudgeon pins wearing pistons - I have a pair with badly worn piston gudgeon pin holes.

Synthetic oils may not be recomended for initial running in as they have been know to make the bedding in of piston rings excessively long.

A search for engine oils on this site will bring up previous discussions.  I have used semi and fully synthetic oils with no problems and I know one Silk owner who has put 50,000 miles on his bike on mineral oil.  As always, pay your money and take your pick.

Hope this helps.