[mgttrmn]

My brother has a 1200 harley sport custom. (shoot me later for bringing up a harley question:harder: :spank: ) the engine will be running fine and then start running like crap, and then die. after a few minutes it will fire up and run a couple of miles and do the same thing again. we replaced the coil and still does same thing. could it be electronic ignition?

any help is apreciated and thank you in advance.

 

[Retro Rich]

Is the 1200 carb'd or FI'd? Either way, sounds like an ignition or fuel delivery problem. Checked all the connections (battery cables, ignition wires, etc., etc.). Checked all vent line/vacuum tube connections (hooked up, lines in good condition and not cracked or pinched)? Pulled the plugs and looked at them? Post back with some answers on this and we'll see what we can figure out.

 

[mscales]

RR has it right I think. Sounds like a vaporlock. Also check the vent lines. Not sure what year but some older ones vent through the cap.

 

[mgttrmn]

Is the 1200 carb'd or FI'd? Either way, sounds like an ignition or fuel delivery problem. Checked all the connections (battery cables, ignition wires, etc., etc.). Checked all vent line/vacuum tube connections (hooked up, lines in good condition and not cracked or pinched)? Pulled the plugs and looked at them? Post back with some answers on this and we'll see what we can figure out.

it only happens when the bike is warm, it is a carb. im prety sure the bike is getting fuel. going down the road it starts to back fire and then die shortly after that. would vapor lock cause the backfire? my brother told me when it quits the coil is not getting power. he's not much of an electrician so i can't be positive thats accurate. everytime it quits i tell him to leave it set so can get a meter on it. he does not like to do that.

 

[Retro Rich]

Well, coil not getting power I'd check the lead going into the coil and/or replace that. After that, it's got to be a short in the system off the ECM (bad or broken wire) or a faulty connection somewhere. Battery is ok I assume and not just "temporarily" holding a charge (i.e.-bad cell in it)?

 

[ibified]

Here's what he needs to do:

1) remove gas cap.
2) pull bike forward.
3) pull a VTX into the spot the harley was in
4) replace gas cap
5) ride MUCH more trouble free.

 

[NC Hammer]

I agree but what does removing and replacing the gas cap have to do with it?

 

[Goldsmith]

Here's what he needs to do:

1) remove gas cap.
2) pull bike forward.
3) pull a VTX into the spot the harley was in
4) replace gas cap
5) ride MUCH more trouble free.

Too damn funny Ibi!

 

[mgttrmn]

Here's what he needs to do:

1) remove gas cap.
2) pull bike forward.
3) pull a VTX into the spot the harley was in
4) replace gas cap
5) ride MUCH more trouble free.

I would completly agree with that but he has that harley bug, I've been trying to talk him into trading off.

 

[Betty Boop]

I would completly agree with that but he has that harley bug, I've been trying to talk him into trading off.

OK, while your out riding :choppersmhe can play with :icon_tetthis bug .... :stirpot: ...and wish he had an X !! LOL....BB

 

[Green Ghost]

No ibified

Here's what he needs to do:

1) remove gas cap.
2) pull bike forward.
3) pull a VTX into the spot the harley was in
4) replace gas cap
5) ride MUCH more trouble free.

1) remove gas cap
2) throw in a match
3) buy VTX
5) ride trouble free

 

[Betty Boop]

1) remove gas cap
2) throw in a match
3) buy VTX
5) ride trouble free

+1 GG !! KABOOOOMMMMM !!!...................sorry....that wasn't nice..now was it.....

 

[VTX Bonnie]

+1 GG !! KABOOOOMMMMM !!!...................sorry....that wasn't nice..now was it.....

Maybe not nice, but funny as hell. :bleh:

 

[ibified]

Hell, it probably wouldnt even explode right...

 

[MerwinT]

It does sound like an ecm problem. When this happens how long does he have to wait before it will start agian? Bad grounds on the ignition system can cause the bike to die when warm, but restart after it cools. Check all the grounds especially the one for the ECM Repost

 

[Bumbee]

It does sound like an ecm problem. When this happens how long does he have to wait before it will start agian? Bad grounds on the ignition system can cause the bike to die when warm, but restart after it cools. Check all the grounds especially the one for the ECM Repost

+1 Merwin That sounds dead on. :cheers: I got some friends that are die hard HD guys/gals, I always laugh when they say there bike isn't working right. But still, I'll do what I can to help any one on a bike out of a jam, even if I am poking fun at them.

 

[coopi]

If its like most Hardleys you would have to push it to the explosion
Coopi