Is the motor stock?


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Reason i ask, my FB has same problem. But my motor is worked. The cams kick back when its hot. Thats why i asked if it was stock


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Yes the bike is all stock except for a set of Cycle Shack slip-ons.

 

Check to see if there's any stored codes. It could be that the CKP is getting out of parameters but is still functioning.

 

I have the same bike as yours (all stock engine), and occasionally I have the same issue. Mine will sometimes do it hot and cold. Hasn't done it recently, though. I'm wondering if old fuel may have had something to do with it. I always run premium in it.

 

I have a 07 Street Bob as well and it does the same thing. Have just fitted a Fuelpak today though so might be better now, will let you know if any different.

 

'11 Fat Bob here and I asked about the same issue a while ago. I haven't got a real answer yet, experience tell me that once you open up the exhaust and intake it happens with more frequency.

I'll ponder the problem for a while and see what I can come up with, in the meantime do check your codes, P0374 (I think) is a Crank position sync error code that will pop up if the bike is cranked for several seconds without starting. This one doesn't necessarily mean the sensor is bad, but if your bike is throwing this code regularly, the sensor may be weak and it's a quick and easy sensor to change out. Insurance in my opinion, it that little sucker gives up, your stranded.

 

My '11 FXDC will do that from time to time if I don't have it in neutral.

 

I just wanted to add my bike has the stock pipes and mufflers and does this every now and again.

 

Could be Sh$t in gas. I always use a SE. Octane booster. It solves ALOT of fuel issues. My opinion. My motor is not stock it needs the booster. But the way gas is now every once and a while u all should use some. Just sayin.....


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I always run premium fuel as well and try to stay away from "no name" gas stations. Although I've gotten a bad tank of gas at Mobil on more than one occasion so I stay away from them as well.

I'll check the codes this week and see what it says if anything.

I'll also throw in a bottle of fuel system cleaner/octane booster and see if that helps.

Thanks for all the suggestions.

Here's a picture of the bike after I detailed it this past weekend.

later,
KrustyTC

 

I have the same problem with my 2011 fxdc when warmed up. To avoid the problem when warm just turn the switch and immediately hit the start switch. It's starts fine if you do this.

 

08 fxdb. If it's warm mine does same thing. I don't inderstand why but flipping the throttle a couple of times when it is warm and it doesn't do it.

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@msw I've tried flipping the throttle but haven't had it work on a consistent basis yet. I'm picking up some fuel system cleaner today and hope to be going to Laconia this Friday so that run should clean out any gunk in the fuel system.

Will let you all know how I make out.

Thanks again for all the advise!
KrustyTC

 

Got the same issue on my stock 09 Fat Bob. Seems to happen more often when it’s hot. I usually wait for the engine light to go off before I try to bust her off. Seems to happen less frequently when I do that...

My thinking is the ECM is running a self check and may not have the setting right for the particular conditions like temp and pressure. Just needs a few seconds to get everything dialed in... But thats just a shot in the dark of course...

 

I have a 2011 Super Glide Custom. I just turn on the key, and wait for the check engine light to go off, and it fires right up every time, hot or cold.

 

Went to Laconia today and the bike ran and started fine. I put a bottle of fuel injector cleaner in before I headed out. Will run a couple more bottles through this season. Maybe I got some crappy gas at some point but as I stated this has happened to Dad as well.

Thank you again for all the advice,
KrustyTC

 

My 2011 Wide Glide does this when hot. Not always, but usually. Acts like vapor lock on the old carb models. I cure it the same way by cracking the throttle just a bit while starting. No engine mods on mine, just Rush slip-ons.

I'm not sure why, but the '05 RK, the '08 Ultra I had and my current '13 Street Glide never do this. And I use the same premium gas in both. Do the Softails do this or is this just a Dyna problem?

 

Not a unique airhead problem, one of my V Rods does the same thing.

 

i hit the starter as soon as i get the switch on and have found it to be a quiker start then waiting for the feul pump to finish its cycle. it fires up on the first revolution of the motor, if i wait for things to cycle it takes two sometimes three revolutions before it pops... but it always pops regardless.

 

My 2008 dyna fxdc does the same when hot sometimes . my old triumph Bonneville does the same . standard behaviour I feel when they been working and hot . fuel evaporating from the heat possibly . normally respond to handful of gas .

 

I just (two and a half weeks ago) got a new Street Bob with the 103 motor and the full Stage IV race kit installed. I follow the procedure and it cranks up fine. It has stalled on me once but fired right back up, and has backfired twice when downshifting from second to first, not bad, but there. Was told this was a quirk of this motor breaking in. Now has 831 miles on it and I can definitely feel the motor beginning to 'seat'.

I also run 93 REAL gas in it....no methanol or anything. Was told that really bad juju....local dealer repairs rubber parts in the induction systems at least five times a month for guys running methanol gas because it destroys everything rubber. So far so good.

 

Where are they selling methanol? Do you mean ethanol?

 

Probably the same thing. Here in TN. it's referred to as methanol. At least that's what it says on the pumps around here. The stickers say that fuel at that pump may have as much as 10% methanol in the mixture.