Hi All,
My '03 V11 Lemans, when cold, requires a twist of the throttle to start. The bike has always required a slight throttle manipulation for the engine to start & run when cold according to the previous owner. I figure the bike is fuel injected (15M PF3C)and shouldn't need anything other than run the "choke/enrichener/throttle plates" to high cam and hit the start button. When I do the high cam and hit the starter button, the engine cranks and wants to start...sometimes it will start momentarily then stall, other times it will crank and not start. However, it will always start & run with a little twist of the throttle. In early 2020, I had some time on my hands and did the "decent tune-up". IMO, since the tune-up, the difference in overall performance was a huge improvement. However, the twist of the throttle thing when cold still exists and was wondering if this is "normal". The owners manual says nothing about throttle manipulation during the starting mode.
I have looked/checked for vaccuum leaks but have found none other than the TB vac ports which I capped off. The tb shafts have very slight wear/side play but they dont appear to be leaking...the bike only has about 10k miles on it. The TPS seemed to have a smooth transition though the mv range when I set it...no hiccups. The mechanical high cam linkage & tb linkage are in good working condtion..no slop. The crank position sensor was out for a new oring, found no metal debris on the sensor. Plug wires & caps were replaced because one cap had tip over damage & high resistance. Air filter was replaced. Engine & air temp sensors seem to be working and display ambient temps until engine heat causes a rise.
Thanks for reading.
Art