Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 2:29 pm
Are you James May?Fred_64 wrote: For psychiatrists, here is my little workshop….
Scooterotica
The UK's No1 Lambretta & Vespa Scooter Forum.
https://www.scooterotica.org/forum/
Improving a piston: porting, polishing...
Page 3 of 4
Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 5:40 pm
Well… I used to work with Jason Dawe (Top Gear 2002), that is how close I will ever be from James May, probably…!Are you James May?
Did you know you could polish dampers as well??
lighter and cheaper than chrome... lasts 3 to 4 days depending on weather conditions.
Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 6:27 pm
fred,
you say a TS1 piston weighs 336 grams..
was that WITH piston rings,gudgeon pin ,clips and maybe small end bearing...?
you say a TS1 piston weighs 336 grams..
was that WITH piston rings,gudgeon pin ,clips and maybe small end bearing...?
Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 7:09 pm
What's the ideal width and angle for a chamfer on the outside of the skirt?
Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 7:21 pm
10/15 degrees and 2mm
others may do it slightly different,but so long as you have some sort of chamfer on there as opposed to a sharp square edge,it will help lube....as the square edge scrapes oil off.
others may do it slightly different,but so long as you have some sort of chamfer on there as opposed to a sharp square edge,it will help lube....as the square edge scrapes oil off.
Re: Improving a piston: porting, polishing...
Posted: Thu Dec 03, 2009 7:29 pm
Fred_64 wrote:Well… I used to work with Jason Dawe (Top Gear 2002), that is how close I will ever be from James May, probably…!Are you James May?
Did you know you could polish dampers as well??
lighter and cheaper than chrome... lasts 3 to 4 days depending on weather conditions.
you sure you aint on that programme how clean is your home.
Leigh
Re: Improving a piston: porting, polishing...
Posted: Tue Dec 08, 2009 12:00 pm
Sorry I was away; YES, it was including everything (even the plastic bags), and it was slightly over 336 gralms; 339.49fred,
you say a TS1 piston weighs 336 grams..
was that WITH piston rings,gudgeon pin ,clips and maybe small end bearing...?
This is a good unit; it tells you the difference between a 72 main jet and a 75 main jet; 0,03 gramms :shocking:
72 jet:
75 jet:
Re: Improving a piston: porting, polishing...
Posted: Fri Dec 11, 2009 9:39 pm
There is a very fine line between "hobby" and "mental illness".... 
whats the point in weighing main jets....
its the flow rate that counts.
next you,ll be weighing bulbs to compare with wattage
whats the point in weighing main jets....
its the flow rate that counts.
next you,ll be weighing bulbs to compare with wattage
Re: Improving a piston: porting, polishing...
Posted: Sat Dec 12, 2009 12:31 am
PMSL :biggrin: :biggrin: :biggrin:sean brady scooters wrote:There is a very fine line between "hobby" and "mental illness"....
whats the point in weighing main jets....
its the flow rate that counts.
next you,ll be weighing bulbs to compare with wattage :lol:
Re: Improving a piston: porting, polishing...
Posted: Sat Dec 12, 2009 1:48 am
MEOWsean brady scooters wrote:There is a very fine line between "hobby" and "mental illness"....
whats the point in weighing main jets....
its the flow rate that counts.
next you,ll be weighing bulbs to compare with wattage