classic motorcycle forum

Hi,
I dont know if they changed form solid to split or was it an alternative used on different models?
The split skirt piston runs a much tighter bore clearance, 0.001 - 0.003in
I have an all alloy Ariel HT5 and the trials 5.5:1 piston had a split skirt, current 6.5 is split as well
I have seen theas crack but not disentigrate
I have come across solid skirt high comp pistons, HS maybe ?

Cheers
John

Hi,
To the best of my knowledge, other than the first year after the multi, which may have been a Jardine box? Rudge made their own four speed gearboxes, in which the shafts run on loose needle roller bearings
Their internal design looks to have been copied but beefed up by Condor/Universal on their A680 models
but these use a combination of caged needle bearings and bushes

There are dozens of different models/ design variations on Albions, its very difficult to know which exact bike they are fitted to by just looking 

HTH
John

Hi All,
260 tons please post a picture of that press ?

Over the last few weeks I have been dismantling a 250ohv J.A.P engine that was siezed with a lot of rust in the bore, crank main bearing was also rusted so as I could not turn the crank to raise the cylinder off the case studs
I was able to remove the studs to split the cases
Then split the crank to release the rod/piston and cylinder
I filled the bore with a dilute citric acid mix an left it for a day or two, then turned the cylinder upside down and repeated the process,
A light cleaning then removed any residue
light pressure in the press on the piston to remove it 

Cheers
John

HI,
The lever needed will depend on which gearbox you have fitted? The one in the photo looks Burman?
Do you know how it fits to the frame?
I may have something similar looking but the frame fitting has been "modified" 
Where are you based?

Regards
John

HI Jon,
I have unsiezed an engine or two by seating the valves closed, (remove rockers or whatever) then fit a high pressure grease fitting to a sparkplug body, (weld or braze). heat some chassis grease and fill the cylinder/head
then fit the grease gun fitting to the spark plug hole and pump grease in to put pressure on the piston

Recently I have heard of freezing the engine cylinder /piston as the piston will shrink away from the cylinder
(cover in a plastic bag before putting it in the freezer, to mantain domestic bliss  )

HTH
John

Hi Ron,
It might be worth trying the carb body in a ultrasonic cleaning bath??
On these the pilot jet is a brass bush thats pressed into the carb body down beyond the end of the pilot air screw, the hole in these is only 0.016in.
So brass and alloy react with each other,  A really good idea  (No not really)

John

Hi,

Any one on the main jet very fine holes lining up front to back or can the be in any position

The needle jets you are referring to are just nipped up tight into the top of the jet holder
the orientation doesnt matter and cannot be easily positioned in any particular position
On those concentric carbs the pilot passages can easily get blocked if the carbs were not drained
check that the two tiny holes on the engine side of the carb body (one under the slide)
are clear through to the pilot screw and to the float chamber

HTH
John