Distributor housing bolts
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Fast Eddie
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Andover Norton Parts Drawings - Andover Norton Factory Parts - Commando Parts
Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.
andover-norton.co.uk
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Thanks, forest from the trees at times after a long day.
If I am fitting a Pazon, do I still need the pictured points etc? (Parts shown in his link as ‘electronic ignition‘ - goes to Pazon- and the non-listed but pictured part underneath it. Bike came with nothing.
If I am fitting a Pazon, do I still need the pictured points etc? (Parts shown in his link as ‘electronic ignition‘ - goes to Pazon- and the non-listed but pictured part underneath it. Bike came with nothing.
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Thank youAndover Norton Parts Drawings - Andover Norton Factory Parts - Commando Parts
Andover Norton Parts are the only Norton spare parts in the market manufactured to original drawings, within the factory-approved tolerances, from the correct materials, and with the correct finish.andover-norton.co.uk
Ron L
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You will need everything in the AN photo except the points plate, the centrifugal advance mechanism, and the contact breaker fixing bolt (labeled 5). In addition I have needed to add a shim to the contact breaker drive shaft on the timing chest side. The free play would allow the EI rotor to strike the stator. A thin washer did the trick. Check before you re-install the timing cover.
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If you are not already aware, then you need to set the Pazon up for clockwise rotation (same as "Norton Atlas") for the points housing behind the cylinders.
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LAB, thank you! that was my stumbling block. Have an 1/8" thick thrust washer for the contact breaker shaft in between head of breaker shaft bolt and the shaft seal. When I go to assemble the shaft and gear with the pin, I only have half a hole. The thrust washer sits on the outside diameter of where the shaft seal sits, effectively holding the shaft out 1/8" minimum, plus whatever gap is between the opposing faces of thrust washer and shaft seal. Is the thrust washer too large of an outside diameter? is it supposed to sit snug against the shaft seal? Should I do away with the thrust washer? Will post pictures once I find the host website.
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if fitting the Pazon PA2 to your Atlas or Commando, see instructions here:
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This should be the thrust washer, below, so does it look a similar thickness?
Andover Norton - THRUST WASHER FOR CONTACT BREAKER SHAFT (1968 ON) - 03.4055
THRUST WASHER FOR CONTACT BREAKER SHAFT (1968 ON)
andover-norton.co.uk
Yes, I see what you mean but I've never had anything to do with the 20M3 Commando points/distributor housing so I can't be of any help in identifying what the problem could be on this occasion, hopefully, one of our other members will be able to.
Ron L
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From your photo it appears that the sprocket is pushed past the hole in the shaft. You need pull the sprocket out until the holes align. This is what creates the free play I mentioned. I needed to add a shim between the sprocket and case to prevent the EI rotor from contacting the stator.
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I'm seeing what Pdr206 describes, the sprocket not in far enough or the shaft not out enough.
Checking part numbers there appear to be three different distributor/points housings for Atlas, P11 and Commando. The thrust washer, however, is only listed for the Commando so perhaps the housing isn't an original Commando part. The Commando housing has two needle roller bearings whereas the other two have one needle roller and a plain bush.
Also, logically, I would have thought a "thrust washer" should have gone between the sprocket and the housing similar to the twin chain intermediate gear thrust washer, not under the head of the shaft but I could be wrong about that.
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The sprocket needs to go back further onto the shaft. Removing the thrust washer accomplishes this. Removing the thrust washer troubles me due to its intended use in the assembly. I will try it behind the sprocket.
I apologize, the literature is quite sparse on this topic.
I apologize, the literature is quite sparse on this topic.
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I purchased the parts as laid out in Andovers website. I will try the washer on the sprocket. Again I bought this as my first Norton and first basket case. Figured ‘how hard can this be?’ 4 years later!
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If it doesn't belong there, then the sprockets will be out of alignment.
Maybe ask AN for clarification or a drawing of how the parts should be assembled perhaps with the dimensions of the parts.
Ron L
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You would think with 3 P11's and a '68 Commando in the garage I would be able to answer this. However the older I get the less confident I am in my memory. Without dismantling a completed bike I checked my stash of spares. All but one of the points housings are like the one shown on the Andover site. They have two needle bearings and an oil seal. One is older and has one needle bearing at the sprocket end and a bronze bush at the points plate end. The drive shaft is scrolled but otherwise identical to the later ones. The housing has no recess for an oil seal on this one.
I measured the thrust washer (which fits against the oil seal) and all three of the ones I have measure 0.060 inch. If yours is 1/8 inch (0.125) this could be the problem.
I hope this is helpful.
I measured the thrust washer (which fits against the oil seal) and all three of the ones I have measure 0.060 inch. If yours is 1/8 inch (0.125) this could be the problem.
I hope this is helpful.
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Also 1/16" (0.0625") according to Walridge and Baxter Cycle for "P11" (although the thrust washer isn't listed for the P11 or Atlas in '66-'68 Norton parts).
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