- Joined
- Dec 5, 2007
- Messages
- 169
Hi My 1970 commando 750 S is original with points and carbies.I will probably go electronic ignition but would like to keep the twin amals if possible. The bike is a bitch to start when cold. often to the point of giving up on the idea of a ride, however once hot it is a first kicker. There seems to be heaps of spark and it runs great ,doesnt kick back so timing isnt an issue either i dont think. Battery is fully charged . I,m sure its not an electrical issue as i can spray aerostart in the air cleaner to kick it over, or else petrol str8 done the plug holes .gives instant bang as well. . I have twin amals (340) written on the body. Pulled them apart after giving up trying to start and the slides appear to be dry , There was a bit of crap in the bowls and around the place so I cleaned everything and put back together but still no difference, , Not having had the bike long i dont know the quircks of getting it running i guess, My gut feeling is its not getting fuel. plugs seem dry also after trying to kick it for ten minutes i tickle it to the point of fuel spitting out and use no choke mostly to get it running. Thats the background now the questions. Is it possible to rejet to make it easier to start,I couldnt read the main jet size currently in them.( I only ride it occasionly and i dont need 10/10 power if its a trade off id prefer the easy starting). Does the needle setting influence starting? I havent checked which notch it is set to yet.Worst case would be to go to one carbie.Should i stay with one of the amals or put a mikuni on. As mentiioned id prefer to stay original but whats the point if i cant start it. I noticed the inlet manifolds are pitted and rough inside is that normal? i would assume smooth air flow would be better, if they should be smooth will it be best to polish them smooth or to replace with new. Any advice will be appreciated, Its New years eve here in Aus so wishing you all a happy new year