norton single 19s .exhaust-downtube + cam-shims

the cam- shims i need would be approx-25mm O.D. and 16mm. I.D. and around 3/6/ thou..surely norton-single builders shim there-cams if needed. the mod 19-exhaust -downtube needs to be new.. . i also need a good mod-19- conrod i think they are 7 .1/2" the con- rod i have must be a big-4- it's 8" can swap rods or will buy the mod 19-rod.. [ tommy-norton.. [ i need to ride it and not hide it]

Previously Paul Knapp wrote:

Just curious here, since you are going to fit cam shims, what clearance are you aiming for Tom? I generally just drift one of the cam bushes either in or out to get a little running clearance.

hi. on the inlet-cam-[ mag-drive] cam i pull +push her for movement i only want a couple of thou-movement.. ON the exhaust cam there is no way off checking it with the engine now built up ,should of been done before , yes ,but what happens if you change the timing-chest-or cams as i have done ..easy-peezie what i do is take the spark plug +clutch- primary chain off ,turn her over at the drive -engine-sprocket by hand ,nice and free add a thin shim and nip her up slowly -turning the sprocket CHECKING the freeness. is ok. take the timing chest off and do the same again adding 1 shim at a time .. when it starts getting hard to turn over take if off add up all the shims ..if it is a big amount it's probably the bush so would renew it and start again. [ eg .if she's free at 5 tho and tight at 6 thou i would put a 3 thou shim in .. doing all this on a cold engine.. i still can't get hold of shims. they would be 24-MM OR 25-MM. O.D. X 16-MM I.D. @ 2/3/5/ THOU.. EVER SEEN A HAND-LEVER-START ON A MOTOR-CYCLE // I SEEN A PICTURE OF ONE ON A 16H. EX ARMY-BIKE. tommy.