Skip to main content
000000 000003 000006 000009 000012 000015 000018 000021 000024 000027 000030 000033 000036 000039 000042 000045 000048 000051 000054 000057 000060 000063 000066 000069 000072 000075 000078 000081 000084 000087 000090 000093 000096 000099 000102 000105 000108 000111 000114 000117 000120 000123 000126 000129 000132 000135 000138 000141 000144 000147 000150 000153 000156 000159 000162 000165 000168 000171 000174 000177 000180 000183 000186 000189 000192 000195 000198 000201 000204 000207 000210 000213 000216 000219 000222 000225 000228 000231 000234 000237 000240 000243 000246 000249 000252 000255 000258 000261 000264 000267 000270 000273 000276 000279 000282 000285 000288 000291 000294 000297 000300 000303 000306 000309 000312 000318 000321 000324 000327 000330 000333 000336 000339 000342 000345 000348 000351 000354 000357 000360 000363 000366 000369 000372 000375 000378 000381 000384 000387 000390 000393 000396 000399 000402 000405 000408 000411 000414 000417 000420 000423 000426 000429 000432 000435 000438 000441 000444 000447 000450 000453 000456 000459 000462 000465 000468 000471 000474 000477 000480 000483 000486 000489 000492 000495 000498 000501 000504 000507 000510 000513 000516 000519 000522 000525 000528 000531 000534 000537 000540 000543 000546 000549 000552 000555 000558 000561 000564 000567 000570 000573 000576 000579 000582 000585 000588 000591 000594 000597 000600 000603 000606 000609 000612 000615 000618 000621 000624 000627 000630 000633 000636 000639 000642 000645 000648 000651 000654 000657 000660 000663 000666 000669 000672 000675 000678 000681 000684 000687 000690 000693 000696 000699 000702 000705 000708 000711 000714 000717 000720 000723 000726 000729 000732 000735 000738 000741 000744 000747 000750 000753 000756 000759 000762 000765 000768 000771 000774 000777 000780 000783 000786 000789 000792 000795 000798 000801 000804 000807 000810 000813 000816 000819 000822 000825 000828 000831 000834 000837 000840 000843 000846 000849 000852 000855 000858 000861 000864 000867 000870 000873 000876 000879 000882
English French German Italian Spanish

1949 ERS2 running settings

Forums

I have a 1949 ES2 I have been restoring (first ever British bike I have owned) I took it for a short test run today up and down the road. My question is really about the air lever (choke) the bike ran much cleaner with the air lever fully open, is this normal ? Im used to using choke to start then close when warm, I had the advance/retard in about the middle. Any advice would be appreciated .

Also it sometimes missed 2nd gear changing up and went to 3rd but coming down was ok, any ideas ?

Thanks,

Mick

 

Permalink

Hi Mick,

   The choke on your Amal 276 carb works opposite to that used on more modern machines or the manual choke on a car. The reason for this is it has a slide that drops down to choke the carb, then when warm you pull the lever back to lift the choke slide. This is not the ideal method, so make sure the lever is kept tight as vibration, gravity and the spring want to try to let the slide back down.

   The advance/retard lever works in the opposite way. If set correctly the bike should run under most conditions with the lever pushed forward. To start, pull the lever back about half way and you can also use this position when left at tick-over or when dawdling in traffic. An easy way to check how the ignition is set is to idle the engine on a slightly fast tick over and see if the bike runs at both ends of the lever moment, although it will sound quite flat on full retard. If it falters at either extreme, then you should think about re-timing it.

   Re. the gearbox problem, if you have the upright box with the external linkage, this may be the problem as the linkage holes wear if not kept lubricated. You might get away with just fitting new clevis pins, but make sure they are 1/4" not 6mm. Before you re-fit the rod, put both the foot-change lever and the gearbox cam-plate lever in the 2nd gear position and adjust the rod to fit. In the situation of a very worn linkage, you may only be able to select 3 of the 4 gears.

P.S. Are you the same Mick Gomme I went to school with in the late 1960s ?

Hi Richard,

Thank you so much for all the information, I have only ever had modern bikes and always wanted a vintage Norton which I now have. Just getting my head around how it all works.

I have attached a photo of the gearbox, is this the type you are describing ? You will also see I have a bad oil leak which is dripping from the lower rear bracket of the chain case, Im guessing I need to start by replacing the seal and checking its not over filled ?

P.S I wasn't at secondary school until the late 70's early 80's.

Attachments
Permalink

" The advance/retard lever works in the opposite way. If set correctly the bike should run under most conditions with the lever pushed forward. To start, pull the lever back about half way and you can also use this position when left at tick-over or when dawdling in traffic. "

Be careful as with some years the setup is tight wire advance (what you describe is slack wire advance which is preferable as if the lever slips it goes to full advance rather than retard). I can't quite remember but I think 1949 was tight wire as the inlet cam was driven by the exhaust cam rather than direct from the crankshaft thus reversing its direction.

The only way to absolutely confirm this without removing th timing cover is to put the bike on the centre stand, take out the plug, put it in top gear and rotate the rear wheel forwards (as if in normal motion). Look at the contact breaker which is in the end of the magneto and you will see it rotate. If it rotates clockwise and the control cable enters the front of the magneto housing then it's slack wire advance. When the cable is pulled that rotates the cam in a clockwise direction thus making the points open later and retarding the ignition.

Stick with it Mick, these bikes can be quite intimidating at first but very rewarding when you master them.

Permalink

Hi Mick,

   A picture paints a 1,000 words! Ian was correct to raise the possibility of your magneto, as many old bikes of this age have had parts changed over the years, and your machine is no exception. The engine in your bike looks to date from 1955 or 6 and has the Welworthy alloy head. If that's the case it should have the prefix K4 (1955) or L4 (1956) on the crankcase, so all the info I gave previously will be relevant, as the magneto rotation was revised for 1948.

   The gearbox is the original upright I referred to and the linkage is behind the oil pipe. Double check where the oil is coming from, it might be from the engine breather pipe, then dripping down. These old Nortons have several areas for oil leaks, so keep us posted on your old bike induction.

   The school reference was a bit of a long-shot, but you never know after all those years!

 

Norton Owners Club Website by White-Hot Design

Privacy Policy