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Running problems

10 Posts | Latest reply on 22/09/2020 19:49:39 by zx12r ninja 03 | Go to original / last post

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Samcro68

In: Northampton
Posts: 1

i have a harley-davidson 1200xl 48
It runs ok for about 10 miles then pops and misses like fuel new plugs added,
Really worried ive got a bag of bolts

Any serious solutions would be great

Message posted by Samcro68 on 20 September 2020 at 20:22

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Samcro68 @ 20/09/2020 20:22:09

yorkie mick

In: Wakefield
Posts: 452

You could look for the ECM error codes as a start.

Here's how to do it.

https://www.hdforums.com/how-tos/a/harley-davidson-sportster-how-to-obtain-diagnostic-trouble-codes-412791

Message posted by yorkie mick on 20 September 2020 at 22:15

yorkie mick @ 20/09/2020 22:15:56

Deleted Member

In: NA
Posts: 0

Could be a simple fuel blockage,, look at easy fixes first.

Message posted by Deleted Member on 20 September 2020 at 22:52

Deleted Member @ 20/09/2020 22:52:20

Deleted Member

In: NA
Posts: 0

Fuel filters are an easy check and can be washed clean.. I dont know much about Harley fuel systems but there will be filter(s) in there somewhere

Message posted by Deleted Member on 20 September 2020 at 23:38

Deleted Member @ 20/09/2020 23:38:10

Deleted Member

In: NA
Posts: 0

For what they cost its worth buying a new one.

Message posted by Deleted Member on 20 September 2020 at 23:43

Deleted Member @ 20/09/2020 23:43:22

In: Birmingham
Posts: 11141

The list is long but as already stated start with the simply 1st. fuel filter you could also have a clogged air filter runs fine till it gets warm then will need increasing air which she can't get. Don't forget the plugs

Message posted by JP on 21 September 2020 at 05:39

JP @ 21/09/2020 05:39:25

GHW

In: Black Country
Posts: 127

Wotcha.
Could also be the breather blocked in the filler cap ( or wherever they put 'em these days ).

Message posted by GHW on 21 September 2020 at 13:21

GHW @ 21/09/2020 13:21:58

TheSlasher

In: chesterfield
Posts: 1303

I had this on my old FLT, turned out the mechanic put the wrong plugs in....

Message posted by TheSlasher on 21 September 2020 at 17:03

TheSlasher @ 21/09/2020 17:03:03

yorkie mick

In: Wakefield
Posts: 452

Just reminded me now Lynn. Some Pratt (or was it me been a prat 😂🤣) convinced me (a dealer) to put some of those plugs in with a fine centre diode where you don't have to alter the gap (forgot what they're called?) and my sporty conked out up on the North York Moors, near Whitby. Nearly getting stranded. Putting my old ones back in ( in my pack) got things moving again.
Phew good job I'd kept them and was carry them at the time.

Message posted by yorkie mick on 21 September 2020 at 21:47

yorkie mick @ 21/09/2020 21:47:39

zx12r ninja 03

In: hednesford
Posts: 57

Could be the coils , I think they play up when they get hot , if it's running for first few miles and his fine , but then plays up when up to temperature, valve clearance up to spec ?

Message posted by zx12r ninja 03 on 22 September 2020 at 19:49

zx12r ninja 03 @ 22/09/2020 19:49:39

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