Popping on tickover - SV650.org

Mark_h · 14-07-06, 01:28 PM

2001 curvey with a CCC can. When it's ticking over it gives a solid pop about every 5 seconds like a minii backfire. Bike goes like a train and makes all the usual noises assosciated with a twin with a sports can, but this popping on tick over is getting me a bit worried. Could it be running too rich or bad plugs or anything else that could be a problem? I've tried adding a bit of choke to see if it gets and worse, but did not make a difference.

Also, may be slightly more frequent with super unleaded, but I'm using it all the time now so not sure if this is relevant.

Any ideas?

14-07-06, 03:04 PM

Is this just when idling at the lights with the bike in neutral/clutch in?

If it happens when changing down, don't worry, it's normal.

TSM · 14-07-06, 03:11 PM

It could be a air leak into the exhaust, check to see if any gasses are escaping from the link pipe.

14-07-06, 03:37 PM

Engine could also be sucking in excess air, it'll pop on tickover if it's doing that.

Mark_h · 14-07-06, 06:04 PM

It is just on tickover. I've tried adjusting it up a bit, but no change. Does it on overrun too, but that's a different noise.

Also does it when it's hot or cold, although slightly less violent when cold.

I have a very slight leak on the link pipe for the can, but just get a light smudge of soot and it passed the MOt like that so doubt it's a big enough leak to cause a problem.

14-07-06, 07:43 PM

Popping on idle is very bizzare - it shouldn't. Can you record and post?

Mark_h · 16-07-06, 06:51 PM

I now have a soundclip, but can not see how to attach it to the post. Any idea? I can mail it to anyone who is interested. c60k

16-07-06, 08:07 PM

Wish my bloody pointy wud pop every now and again!

16-07-06, 10:35 PM

Quote:

Originally Posted by Ward8124

Wish my bloody pointy wud pop every now and again!

Get a race can or a road legal with the baffle out. Mine pops likes crazy and it still makes me giggle after 6 months.

16-07-06, 10:41 PM

Mine did this and after much searching I found that I'd nicked the rubber carb manifold and there was a very slight air leak. At higher revs I think the fuel/air mixture pressure overcame that of the leak and it wasn't a problem. Origianlly I thought it was the result of my home tuning efforts, but it became so irritating that I had to investigate.

When I say nicked what I really mean is that a part of the rubber had gotten pushed under the carb when I put them back on, so that a part of the lip was crimped under the carb instead of around the outside. IYKWIM.

14-07-06, 01:28 PM	#1
Mark_h Member Mega Poster Join Date: Aug 2005 Location: Fleet, Hampshire Posts: 2,448	Popping on tickover 2001 curvey with a CCC can. When it's ticking over it gives a solid pop about every 5 seconds like a minii backfire. Bike goes like a train and makes all the usual noises assosciated with a twin with a sports can, but this popping on tick over is getting me a bit worried. Could it be running too rich or bad plugs or anything else that could be a problem? I've tried adding a bit of choke to see if it gets and worse, but did not make a difference. Also, may be slightly more frequent with super unleaded, but I'm using it all the time now so not sure if this is relevant. Any ideas? __________________ Don't want to be the quickest; don't want to be the best; just want to be the one having the most fun. XL125Varadero -> Curvy SV650N-Y -> SV1000N-K3 -> Multistrada 1200s Twin-tastic stuff. Minister for Sustainability *Aliquid prudentissimus delectabiles et intelligentes in adamasset lingua.*

14-07-06, 03:11 PM	#3
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	It could be a air leak into the exhaust, check to see if any gasses are escaping from the link pipe. __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

14-07-06, 06:04 PM	#5
Mark_h Member Mega Poster Join Date: Aug 2005 Location: Fleet, Hampshire Posts: 2,448	It is just on tickover. I've tried adjusting it up a bit, but no change. Does it on overrun too, but that's a different noise. Also does it when it's hot or cold, although slightly less violent when cold. I have a very slight leak on the link pipe for the can, but just get a light smudge of soot and it passed the MOt like that so doubt it's a big enough leak to cause a problem. __________________ Don't want to be the quickest; don't want to be the best; just want to be the one having the most fun. XL125Varadero -> Curvy SV650N-Y -> SV1000N-K3 -> Multistrada 1200s Twin-tastic stuff. Minister for Sustainability *Aliquid prudentissimus delectabiles et intelligentes in adamasset lingua.*

16-07-06, 06:51 PM	#7
Mark_h Member Mega Poster Join Date: Aug 2005 Location: Fleet, Hampshire Posts: 2,448	I now have a soundclip, but can not see how to attach it to the post. Any idea? I can mail it to anyone who is interested. c60k __________________ Don't want to be the quickest; don't want to be the best; just want to be the one having the most fun. XL125Varadero -> Curvy SV650N-Y -> SV1000N-K3 -> Multistrada 1200s Twin-tastic stuff. Minister for Sustainability *Aliquid prudentissimus delectabiles et intelligentes in adamasset lingua.*

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14-07-06, 03:04 PM	#2
Flamin_Squirrel Guest Posts: n/a	Is this just when idling at the lights with the bike in neutral/clutch in? If it happens when changing down, don't worry, it's normal.

14-07-06, 03:37 PM	#4
Jase22 Guest Posts: n/a	Engine could also be sucking in excess air, it'll pop on tickover if it's doing that.

14-07-06, 07:43 PM	#6
1world2wheels Guest Posts: n/a	Popping on idle is very bizzare - it shouldn't. Can you record and post?

16-07-06, 08:07 PM	#8
Ward8124 Guest Posts: n/a	Wish my bloody pointy wud pop every now and again!

16-07-06, 10:41 PM	#10
Razor Guest Posts: n/a	Mine did this and after much searching I found that I'd nicked the rubber carb manifold and there was a very slight air leak. At higher revs I think the fuel/air mixture pressure overcame that of the leak and it wasn't a problem. Origianlly I thought it was the result of my home tuning efforts, but it became so irritating that I had to investigate. When I say nicked what I really mean is that a part of the rubber had gotten pushed under the carb when I put them back on, so that a part of the lip was crimped under the carb instead of around the outside. IYKWIM.