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EFI Sportster Motorcycle Talk (2007 and up) For 2007 and above Sportsters

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  #11  
Old 3rd October 2007
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Also don't forget if you don't have a spare relay with you, HIT IT!!!. Doesn't work all the time but it just may get you by.

My starter relay went bad and smacking with the end of a screw driver while pushing the starter button was enough so I could get to the dealer to pick up a a new one.
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  #12  
Old 6th October 2007
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Quote:
Originally Posted by ColinB View Post
Hi, although I'm not Kev (phew!) I followed his advice and got myself a spare relay - mine was already corroding up after 4 months of a wet summer over here.

The number is 31601-04 Relay, SPST, Sealed (or so it sez on the pack)
Thanks for handling that for me.

Ya see, I don't use the same spare, since I use a 5-pin relay that can be a spare on the Guzzi too if need be.

K
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  #13  
Old 10th October 2007
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2007 1200 low, mine will stumble usually once during warm up, sometimes just sitting and idling and sometimes when I first take off. Anyone else have this problem? Thanks
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  #14  
Old 10th October 2007
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Quote:
Originally Posted by 2007Low View Post
2007 1200 low, mine will stumble usually once during warm up, sometimes just sitting and idling and sometimes when I first take off. Anyone else have this problem? Thanks
Not really hte point of this thread, so why don't you start your own and I'll be glad to help.

That said, I THINK we've discussed this before.

I think it is normal, and tends to occur on our 1200L but only in the first 30 seconds or so, more likely on a colder startup. Doesn't seem to stumble more than once IF at all...
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  #15  
Old 10th October 2007
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i had an issue a while back after my bike was painted. i was most of the way home from work...thank God, work's 24 miles from home. the bike sputtered and stalled applying throttle. had half a tank of gas, the second tank since painting. the problem at hand on the road was rush hour traffic, a curb on one side and guard rail on the other...nowhere to pull over. i kept messing with it to try to start it.... nothing. cranks like hell, but no start. cars were behind me...i damn sure wasn't pushing, i let the clutch out and cranked it lurching up a hill to a parking lot. i walked 2 miles home got gas and a car...filled the tank. started right up. ran like crap, but started. once i got the turd back to the house i checked the fuel at the carb...i could see it squirting and smell it. pulled a plug, wet looking...started thinking the jets i put in may be too large...didn't change them at this point. i did start to wonder if something from the painting got into the tank. i disconnected the line to the carb, pulled a vacuum on the diaphragm and drained a sample of gas...reserve side, duh! when water in fuel settles it looks urine pale. it was evenly pale and didn't smell right. i figured hell, drain it all and start fresh. i caught it all in pepsi bottles, 2liters and 20 ounces later(mixed measurements...different bottles) gas started flowing through. remember stalling can stem from something simple as filling up. check the basics before fixing stuff that wasn't broke until you tinkered.
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Old 10th October 2007
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Quote:
Originally Posted by 2007Low View Post
2007 1200 low, mine will stumble usually once during warm up, sometimes just sitting and idling and sometimes when I first take off. Anyone else have this problem? Thanks
Welcome to the XL Forums.

You'll find a wealth of good info here....

Try a subject search on "stumble". Might find some helpful input that way.
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  #17  
Old 10th October 2007
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Quote:
Originally Posted by 2007Low View Post
2007 1200 low, mine will stumble usually once during warm up, sometimes just sitting and idling and sometimes when I first take off. Anyone else have this problem? Thanks
Yep, mine does that and, like you say, just once about a minute after start up. It still did it after I put a Cobra Fueler on. It never stalls, just dips momentarily. I presume it's the 'electronic enricher' part of the EFI program getting 'pushed in' as it warms up.
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  #18  
Old 13th October 2007
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Hi, I'm not sure which member mentioned it, it was quite a few pages back in one of these threads about EFI problems. But I think he was right on the money when he said "it's not the fuel pump, it's the fuel pressure regulator that's the problem", which is part of the fuel pump assembly. He also mentioned HD Tech Tip #328 and posted an excerpt from it which fixes the low fuel pressure that the faulty regulator is producing.

My bike was occasionally having a hiccup in the first few minutes after cold start. It also was only getting about 40 mpg consistently, city or highway. Yesterday I went to the dealer and had them install the service kit from Tech Tip #328 and I could definitely tell that it runs a little smoother which stands to reason if the fuel pressure is too low it doesn't atomize as well as when it is sprayed into the cylinders at a higher pressure. When they got done with my bike I filled it up for the 100 mile drive home and my fuel mileage went from 40 mpg to 51.25 mpg and this included drive 80 mph for 50 of the 100 miles that I drove. Jury is still out on the hiccup but so far so good.
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Old 13th October 2007
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2007Low,
Thank you so much for your post in this thread. What you are talking about is EXACTLY what I am experiencing with my 2007 1200R -- poor gas mileage, major league "stumbling" when cold, sometimes when warm. The bike just runs like crap -- always has. It was even more pronounced when I completed the stage I (I have since put the bike back to stock and am trying to sell it). I'm curious, what was your approach with the dealership? Did you tell them to do the Tech Tip #328 or was it something they offered? Any resistance? Is this tech tip covered under warranty? Thanks again.

Last edited by idahopilot; 13th October 2007 at 18:05.. Reason: added question
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  #20  
Old 14th October 2007
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I told them about the problem and they wanted to keep the bike over night in order to do a stone cold start. I couldn't leave it with them and a couple days later after I started the bike, driving out of the parking lot it almost died on me. You know that if you're not quick on the clutch you could dump the bike. This really upset me so that afternoon I got on the phone with the dealer and expressed my concern with having to worry about this happening at the wrong time. At the same time I asked if they would install this service kit called out in the Tech Tip and they agreed to do that. I still don't know for sure if the stumble is gone, it did it again on the next stone cold start and ride. But on the next cold start it did not do it. I noticed that it doesn't pop anymore either when I roll off the throttle which I'm glad. Anyway I will just have to see how it acts the next few times I ride. I don't know if there is any truth to what some say about the computer relearning after something like this or if you disconnect the battery for a certain length of time and then the computer has to relearn. Anyway, that's my experience for now, I'll keep adding to this thread when I learn more.
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