Scooterotica

sean brady scooters wrote:I,ll try to get some pics up soon,of the spiggot cut down to gasket surface if thats what you want to see...
But,theres more that can be done on these....
I,ll try to explain as best as i can for now until i get some more pics taken and posted...
If you are familiar with the malossi 166 ,172 and 210 kits you may have noticed that all the pistons have holes in them (about 1 cm below rings)which only on the 166/210 kits line up with ,and feed directly into the very short transfer passages...and so giving a much shorter route for the intake charge from behind the piston crown into the trans...another advantage of this is piston cooling.
for some reason the 172 kit (although the piston has these holes )...differs in design with the extra long passage walls...hence blocking this beneficial effect.
so basically the transfer port inner walls on a malossi 172 can be cut right down ,and well below the gasket surface until they line up with the piston holes at BDC.....

sean brady scooters wrote:..........if anyone could please help with ideas/pics etc of how to best beef up/re inforce casings..................i would be very gratefull..............
i have some ideas myself ,but would really like to see a whole range of opptions before i decide what is the best to do .....................
cracked casings on tuned vespas is alarmingly quite common....................so please lets hear some input to sort this out......................
thanks in advance...............
sean

sean brady scooters wrote:I,ll try to get some pics up soon,of the spiggot cut down to gasket surface if thats what you want to see...
But,theres more that can be done on these....
I,ll try to explain as best as i can for now until i get some more pics taken and posted...
If you are familiar with the malossi 166 ,172 and 210 kits you may have noticed that all the pistons have holes in them (about 1 cm below rings)which only on the 166/210 kits line up with ,and feed directly into the very short transfer passages...and so giving a much shorter route for the intake charge from behind the piston crown into the trans...another advantage of this is piston cooling.
for some reason the 172 kit (although the piston has these holes )...differs in design with the extra long passage walls...hence blocking this beneficial effect.
so basically the transfer port inner walls on a malossi 172 can be cut right down ,and well below the gasket surface until they line up with the piston holes at BDC.....

Stirling Hopkirk wrote:

sean brady scooters wrote:..........if anyone could please help with ideas/pics etc of how to best beef up/re inforce casings..................i would be very gratefull..............
i have some ideas myself ,but would really like to see a whole range of opptions before i decide what is the best to do .....................
cracked casings on tuned vespas is alarmingly quite common....................so please lets hear some input to sort this out......................
thanks in advance...............
sean

I've cracked no end of casings but since adding the two extra fixings the TS1 has been ok, (thank f@@k!! Wouldn't want to do another set for it)

C*NTSPEED wrote: looks good but would you get same result leavinbg the cover alone and welding some more meat on the inside at primary mate?

Stirling Hopkirk wrote:

C*NTSPEED wrote: looks good but would you get same result leavinbg the cover alone and welding some more meat on the inside at primary mate?

Casing is very thin there, so didnt want to do to much welding in that area and risk distortion.
The two extra bolts has been an easy and effective solution.