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es2 1953 amal 276 FT/IDJ

Submitted by mike_tipper on Fri, 26/02/2021
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Nortons - General

hello , i am pretty new to norton ownership purchasing my es2 about 6 weeks ago. i have been renovating this and what i have is a very nice /pretty bike with a bit of patina. 

when i first went out i noticed that i needed a bit of choke to accelerate and maintain speed all be it at 30 - 40 mph. rode quite nicely but i only did 2-3 miles.

it has a 276 Amal carb - 160 main jet etc which i have taken apart, cleaned and refurbished with an appropriate kit. it either starts first or second kick or takes 10 mins or so to fire up - plug is clean - not sooty at all even after running on choke etc.

the engine cuts out after 5 - 6 mins. so you'd think petrol starvation.

looking for some advice on starting, basic carb settings and advice on possible causes and fixes to my running issues - this one is doing my head in.

with your assistance and a logical - systematic approach with your knowledge and advice i am sure we can crack it.

on another point i notice that the battery is completely flat - can anyone reccommend a suitable replacement ?

 

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Submitted by robert_tuck on Fri, 26/02/2021

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If you are tickling it to start and it will run for a few mins ,I would suspect poor fuel supply or low fuel level. 

yes , thanks , tickled it is...about 6 pushes on the tickler and there is plenty of new clean fuel in the tank, new fuel taps and hoses etc.

i have even used carb cleaner squirted into the carb to get it going.

Submitted by robert_tuck on Fri, 26/02/2021

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Thats just enough fuel to do what it does.  But the normal supply is not being drawn in.  Its most likely that the small passages in the carb are  partially blocked .  I would do a total strip including removal of jet block which will expose the tiny fuel ways. It could also be that the fuel level is too low. Float needle wrong or incorrect parts that the float chamber mounts   on.

Submitted by richard_cornish on Sat, 27/02/2021

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Hi Mike,

   As Robert says this is probably fuel starvation. Remove the petrol pipes and check the fuel is running freely from each tap and check the breather hole in the filler cap is not blocked. It is possible, depending on what type of petrol pipes you have, to get an air lock in the pipes. Before you start kicking, turn on both taps and when the bike is running O.K. turn off the near side reserve tap and see how the bike runs then. Make sure you have the correct float and it's clip is engaged in the needle correctly. On the float chamber make sure there is no blockage in the bottom arm feed hole, you might need to remove the small blanking bolt. Check you have the correct slide needle as the 289 is longer and that the clip is a good fit and start with it in the middle position to see if it runs O.K.

Submitted by robert_tuck on Sat, 27/02/2021

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Later carbs like the monoblock have bigger internal passages and the very fine pilot jets are easily removable ,so can often be cleared  with a blow thro.  The pre monoblock carbs are very different with no removable pilot  and very fine long passages  that are not readily accessible unless you knock out the block   Take care and  renew the paper gasket  betwixt  block and body which can block fuel if not sized properly. Read up to avoid damaging the parts. Find an enlarged detail of the pilot and bypass system and study it , if you are good with IT   please post a blown up detail and macro photos  to help those that follow.  

 


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