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Messages - Ariel-KH-500
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« on: June 20, 2026, 08:00:46 AM »
An update on the starting issues, after the 2nd ultrasonic clean and carb balance the bike started 1st press of the starter it was then left over night and again a 1st press start. the bike was the left untouched for 4 days again 1st press start it was left again for 5 days and again started right up I've been out on it yesterday and did approx 80 miles with a stop at around half distance. I am now going to let the bike stand for a week and see if it still starts ok after not being started as this was always the main problem so far so good will report again when I next start the bike.
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« on: June 12, 2026, 12:14:27 PM »
No the float bowls were spotless inside,I always use e5 petrol (Esso) in all my bikes always from the same garage. After re fitting the carbs it started fine then left it for 24 hours and again started fine I am now going to leave it for 4/5 days and then see if it starts ok, the problem has always been when the bike has not been started for while if started every day no problems. I will post again next week with the result after it has stood un started.
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« on: June 11, 2026, 11:00:24 AM »
I removed the carbs yesterday and put them through the ultrasonic cleaner again at 60 degrees and for a 20 minutes , replaced the carbs and bike started ok I then rebalanced the carbs using my vacuum gauges. Bike start fine and ran ok on the bench. today I will start the bike again to see if all is cured although the real problem was when it had stood for a few days if it stars o k today I'm then going to leave it for a few days and see if it will start as it should. One question for the experts is there anywhere where I can get some new felt seals for the slide lifting spindles. will repost in a few days with an update.
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« on: May 23, 2026, 08:43:06 AM »
Another update on the 400 starting issues. After reading the suggestion of blocking off the air intake and turning over with the kill switch turned to the off position I tried this after not starting the bike for four days as the problem has always been when its been left a while, so fuel on kill switch off air box intake covered three four second bursts on the starter and low and behold it fired straight up. So according to previous post this indicates primary circuit I will now remove the carbs and investigate in the meantime anyone with previous experience of this problem or inspecting the primary circuit I would be very grateful for any advice thanks in advance.
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« on: May 18, 2026, 09:25:09 AM »
When I posted regarding my starting issues I said that I would report back so here goes. Carbs taken off bike completely striped the carb bodies have been ultrasonic cleaned along with all the jets. The carbs then reassembled new O rings and slides set up on the bench, then refitted to the bike and all set up with vacuum gauges, bike started ok and ran fine, after leaving it for a few days went to start it and just like before turned over 2/3 times then fired but didn't start after a few more attempts it fired but rather lumpy the chiming in on all 4 once running it runs fine. I'm at a loss to think why as if I try to start it after a few hours it will start fine its only when it has not been started for a few day any ideas Kevin
6
« on: May 07, 2026, 11:39:25 AM »
It dose not make any difference if I just turn the fuel on or turn it on early the problem is still the same, its probably an old habit riding my old classic bikes as if they have stood for a few days the old Amal carbs tend to evaporate.. spark plugs are new and purchased from David silver along with air filter and oil filter. Just waiting for cleaning fluid to arrive will post results when carbs have been cleaned refitted and balanced
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« on: May 07, 2026, 09:03:24 AM »
Having problems starting the bike when its stood for a few days. When trying the start the bike I turn on the fuel about 5-10 minutes before trying it turns over ok and for about 4 presses of the button it makes no attempt to fire, after more presses of the button it fires once this then happens a few more times until it starts to run but very lumpy eventually it will chime up on all four cylinders and run. When ridden it performs as it should and when left for a few hours it stars as it should. So the jobs that I have done so far are Timing checked, valve clearances checked, balanced carbs, fitted new battery, checked petrol tank fuel filter, also only E5 fuel been used. I've now removed the carbs and have stripped them ready to ultrasonic clean them upon initial inspection they look spotless. The bike has only done 13,000 miles from new, I will post again in a few days to let you know if the cleaning was a success but in the meantime any ideas or advice gratefully received . PS bike stored in my dining room during the winter after draining the tank and putting fuel solutions storage fuel in it and running it through the carbs bike started ok after winter lay up.
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« on: May 07, 2026, 08:34:27 AM »
just recently joined the forum, based in kings Lynn Norfolk owning a 1978 cb400/4 which I have had for 2years. will post in the 400 section soon as having problems when trying to start the bike when its not been used for a few days will be grateful for any advice from more experienced members.
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