Had a warm day and went to start the bike but it wouldn't start. Cranking was no problem battery tested at 12.62 vdc.
​​​checked the spark plugs for spark and got shocked in the process, both are sparking. Took the air filter off and cleaned it with the k and n stuff. When cold she only wants to start with the throttle cracked a little. Any suggestions on where to look?

 

Make sure your battery connections are tight and clean , look for corrosion and breaks in the cables , especially inside the plastic cover . Also check the wiring that runs down to the starter as well , again , make sure it's clean and free from corrosion .

If that all checks out and like you say , you have good battery power , I would start looking at your fuel system . Are you getting fuel ? Is the fuel pump priming when you turn on the switch ? Filter plugged inside the tank , leak in the fuel lines inside the tank ....

While your at it , have a look at the inside of your throttle body , give it a good cleaning with some carb cleaner and a toothbrush , any carbon build up will cause it to idle poorly .

Give this a read , also have you checked for error codes ?

https://www.hdforums.com/how-tos/a/h...e-start-414174

 

All valid ideas on helping me I appreciate the response

 

so , your bike starts fine when engine is at running temp , no issues when riding through all the gears at all speeds ?

 

Correct. When the bike is warm it starts right up. Rode around the neighborhood got up to 50mph and when I got back on the bike after stopping at the supermarket it started right up. When I got home I checked for codes but all genre's had a big fat N next to them.

It's only when it's a cold start does the engine keep cranking. It takes holding the throttle like 20% open it starts.

 

Ok , if your not having any issues when warmed up and it's idling , running smoothly throughout all gears ( running as it should ) , I would rule out the fuel pump as the issue .

Tell me more about the bike , is it stock , have you done stage 1 , any recent work done ?

Check your plugs , clean and re gap ... or replace ... Not sure if your a believer , but you could also run some sea foam though your fuel system , about an oz / gal .

Try resetting your TGS
Handle bar switch in run position , turn on your ignition , do not start the bike , and wait 10 seconds , then turn off for 10 seconds , repeat this procedure 4 times in a row .

If that doesn't help , try resetting your ecm -
https://www.hdforums.com/how-tos/a/h...our-ecm-413937

 

Sure. 2015 Harley Davidson ultra classic. Harley burst air cleaner. 58 mm intake. Screamin beagle 259 cams. Screamin beagle high flow headers. Screamin beagle nightstick full exhaust you know the ones where they moved the catalytic converter to the slip on. 110 cu in.

 

What kind of tuner do you have and was it dyno tuned or a base map? It sounds like you need to bump up the fuel at cold start, which could make sense with the bigger throttle body and cams.

 

Could very well be a tuning issue , did the bike start fine at any time when it was cold before , without any issues , or is this the first time it's been cold , since the modifications were done ? Could be onto something here .

 

I have the street tuner. Base map for what's inside downloaded almost 3 or 4 years ago