Not idling and backfires from front cyl. - SV1000 Portal
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post #1 of 17 (permalink) Old 16th May 2019, 11:13 AM Thread Starter
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Not idling and backfires from front cyl.

2003 sv1000s w/ 7K mikes.

Bought it new and use it every season for a bit.

Last season mayor maintenance, new tires and put about 1k with no problems.

Took it out of hibernation yesterday and started right up.

Went for a ride and all felt great into the highway doing about 80mph. Bike ran strong for 5 min in highway then felt power loss.

Took the exit and bike stalled at idle. Started but did not idle. Ran it at 2k-8k rpm and took it home.

There I noticed as running it on the gas the front cylinder occasionally backfires.

Thinking front injector.

Any thoughts? Help is appreciated.

I've spent most of my money on women, fast bikes, and booze.
The rest I just wasted!
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post #2 of 17 (permalink) Old 16th May 2019, 02:11 PM
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Is it throwing a CEL? If so, put it in dealer mode and post the code.
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post #3 of 17 (permalink) Old 17th May 2019, 02:18 AM
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Could it simply need new spark plugs?

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post #4 of 17 (permalink) Old 17th May 2019, 12:29 PM Thread Starter
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Started right up and idled fine for a minute past two days.

Didn’t have time to ride it yet.

No lights came on. Going to google how to pull codes later and check.

Ordering plugs and injector cleaner for sure.

I’ll update later.

Thanks

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post #5 of 17 (permalink) Old 17th May 2019, 02:25 PM
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If no lights came on it isn't throwing a code.
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post #6 of 17 (permalink) Old 17th May 2019, 02:34 PM
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While you're in there replacing plugs, have a look at your spark plug wires. Just carefully twist them out of the coils.


Here's a pic of what mine looked like recently: https://www.sv-portal.com/forums/att...1&d=1557622415


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post #7 of 17 (permalink) Old 17th May 2019, 10:50 PM Thread Starter
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Starts fine. Went for a ride to auto part store and same thing.

Did not have the plugs in stock but took a peek anyway.

Put a bottle Lucas injector cleaner and took it home.

Felt a tiny bit better but not idling for long.

Looking for denso plugs. around here in stock to change tomorrow

Not even NGKs in stock.

Thanks for the replies!
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post #8 of 17 (permalink) Old 19th May 2019, 12:32 PM Thread Starter
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Fixed.

I will never underestimate those little f*#%ers again.

Two tiny spark plugs brought the beast back to life.

Hard to believe it was just the plugs. The way it lost power I thought I blew a ring.

They didn’t even look that terrible.
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post #9 of 17 (permalink) Old 20th May 2019, 12:57 AM
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mate, those plugs looked pretty torched thats for sure.....

And oldbaldsob, i was never aware that you could unscrew the plug leads from the coils themselves.... if so, it probably worth replacing the leads completely hey....the rot might not be as bad in the middle as the ends, but resistances would have to be different for sure.....

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
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post #10 of 17 (permalink) Old 20th May 2019, 01:34 AM
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Those plugs are wasted!
For reference next time you can use the following plugs when trying trying to find a set at the auto parts store

CR9E
CR9EIX

-ms
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post #11 of 17 (permalink) Old 20th May 2019, 01:51 AM
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Quote:
Originally Posted by Missing Link View Post
....And oldbaldsob, i was never aware that you could unscrew the plug leads from the coils themselves....
Yep, I didn't know that either for the longest time...until I read about it here on this awesome forum.

https://www.sv-portal.com/forums/1852187298-post6.html

https://www.sv-portal.com/forums/1852310609-post8.html

And I actually stumbled across an old post of yours where you cut off 5 mm of the end of the coil wire here: https://www.sv-portal.com/forums/1852310801-post12.html

Anyhoo....it magically cured my high rpm misfire that reappeared recently: https://www.sv-portal.com/forums/4-s...post1852321699


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post #12 of 17 (permalink) Old 20th May 2019, 02:31 AM
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Yeah.... i removed the 5mm from the plug end....never thought you could do it at the coil end.....would have thought it would be bonded in .....

Just had alook at the other links... no mention of removing them from the coils, only the caps....

Is one of us misunderkerstumbling ?

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
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post #13 of 17 (permalink) Old 20th May 2019, 03:26 AM
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Quote:
Originally Posted by Missing Link View Post
Yeah.... i removed the 5mm from the plug end....never thought you could do it at the coil end.....would have thought it would be bonded in .....

Just had alook at the other links... no mention of removing them from the coils, only the caps....

Is one of us misunderkerstumbling ?

Yes, I am misstating what I did. It is the plug end as noted by the yellow circles.
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post #14 of 17 (permalink) Old 20th May 2019, 06:25 AM
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ha ha.... it happens......usually after dodgy Mexican food.....

It does make a difference trimming them back.... and there is enough length in them to
accomodate five or 6 trims i reckon....

I might no' be a smart man Jenny....but i can pain' ma copper colored bike a dif'ren color.....
.
.
2003 Copper SV1000S
Repainted Ford PE (Petroleum Mica)
Yoshi 2:1 collectors and Arrow titanium can...
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post #15 of 17 (permalink) Old 23rd May 2019, 09:04 PM Thread Starter
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Other than carbon build up and having over 5k miles they don’t look that bad.

I think most engines specially Motorcycle are set to run rich most of the time.

Any thoughts 💭?
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