Search found 243 matches

by tavspeed
Tue Aug 02, 2022 2:59 pm
Forum: Vespa Tech
Topic: pk80 gearbox assemby
Replies: 1
Views: 6985

pk80 gearbox assemby

hi chaps,rebuilding a pk80 engine for a mate,came as a box of bits,just need advice on the loose gears assembly,one side of each of the 4 gears has a raised boss ,as you put them on the mainshaft does the raised boss point to you(flywheel side)have assembled it this way and sliding dog and gears all...
by tavspeed
Wed Dec 09, 2020 7:43 pm
Forum: Lambretta Tech
Topic: dt 250 piston in a ts1 pro's and con's
Replies: 7
Views: 3946

Re: dt 250 piston in a ts1 pro's and con's

rd400 and ktm 200 rod are 115 and 118,but 16mm pin,so would need piston bushes wich i would want to avoid,gran turismo have a 125mm long maico rod advertised with a 18mm pin,so would need a 13mm packer with a 58mm stroke crank,would you have problems with the exhaust or head cowel hitting frame tube
by tavspeed
Wed Dec 09, 2020 1:22 pm
Forum: Lambretta Tech
Topic: dt 250 piston in a ts1 pro's and con's
Replies: 7
Views: 3946

Re: dt 250 piston in a ts1 pro's and con's

what rod did you use warkton,only rod i can find is the gt rod 110mm with a 18mm small end,as the compression height on the dt piston is 34mm,this would give me 144mm total length,so would i have to machine 2mm off the base of the cylinder to get piston level with gasket face putting those figures i...
by tavspeed
Tue Dec 08, 2020 10:50 pm
Forum: Lambretta Tech
Topic: dt 250 piston in a ts1 pro's and con's
Replies: 7
Views: 3946

dt 250 piston in a ts1 pro's and con's

anyone running a dt250 piston in their ts1,are there any issues with ring peg position etc,i am eventually going to have my ts1 barrell re sleeved,so look a good option as plenty of oversizes,what rod are you using and are you using piston bushes,cheers
by tavspeed
Wed Sep 23, 2020 4:23 pm
Forum: Lambretta Tech
Topic: sil 2 hole silent block
Replies: 9
Views: 5917

Re: sil 2 hole silent block

bgm say something about the crank is not on the centreline of the engine,so wants to twist the engine in the frame because of the centrifugal force,thats why they have the holes have to be in the correct position and the kickstart also wants to twist the engine when starting,,cheers
by tavspeed
Wed Sep 23, 2020 4:14 pm
Forum: Lambretta Tech
Topic: sil 2 hole silent block
Replies: 9
Views: 5917

Re: sil 2 hole silent block

if we use the clock face as a reference,each hour is 30 deg,so 8-10 is 60 deg and 1-3 is 60 deg,but 10 -1 is 90 degrees!!,i would say the 2 holes are 60 degrees apart, think i will go with nick b,s,cheers
by tavspeed
Tue Sep 22, 2020 7:19 pm
Forum: Lambretta Tech
Topic: sil 2 hole silent block
Replies: 9
Views: 5917

sil 2 hole silent block

hi chaps,got a pair of gp sil 2 hole silent blocks to fit for a mate,can any one confirm the orientation of the holes,cheers
by tavspeed
Thu Aug 20, 2020 5:45 pm
Forum: Vespa Tech
Topic: vespa cosa rear hydraulic hose removal
Replies: 0
Views: 3805

vespa cosa rear hydraulic hose removal

anybody know how to remove the rear hose,goes into the frame above the swing arm,and seems to have a metal sleeve,can,t budge it,do i have to remove tank etc to get it out,cheers
by tavspeed
Mon Jul 27, 2020 7:52 pm
Forum: Lambretta Tech
Topic: GT186 piston skirt question
Replies: 5
Views: 4162

Re: GT186 piston skirt question

if you have your old piston,measure from the centre of the gudgeon pin to the bottom of the skirt.and compare it to your new one, if you are going to use the new one you will have to shorten the skirt to suit,adding packers will only,raise the barrel,strange that it is hitting the case with a 110mm ...
by tavspeed
Sun Jun 28, 2020 7:40 pm
Forum: Lambretta Tech
Topic: ts1 yamaha reed valve options
Replies: 1
Views: 1562

ts1 yamaha reed valve options

hi chaps,i have what i think is a ts1 yamaha reed valve assembly,it has stainless steel reed petals,which i am wanting to replace,does anyone know the exact yamaha model which has compatable petals,rd350,rd350ypvs,banshee etc, i should be looking at,or any recommendations,and can you confirm i would...