SV1000 exhaust temp different [Archive]

paturoa

27th April 2006, 22:57

Help please

I've got a SV1000S K3 with Micron cans

Anyway, a while back I noticed on start up that the left hand pipe exhaust temp is cold compared to the right hand. Even when hot the left hand exhaust temp is quite cold in comparison.

So off I trot to Colemans and get it checked. The mech said did checks, didnt say which, but everything was fine. (Bloody cheek - I'm still angry, he did an oil and filter change without asking and charged me for 1.5 hours labour as well). He said TLs are the same, but colder on the right hand pipe.

Well I'm becoming not so sure now as it has now started to backfire / cough when I blip the throttle on a down change AND the warranty expires next month.

Anyone else's run cold on one side?
Anyone else's backfire / cough on bliping the throttle on down chage?

onearmedbandit

27th April 2006, 23:07

They did work without you asking for it to done?? I'd tell them to shove their bill. What did you ask them to do? A 'once over'? Or did you instruct them to only inspect why the exh temp was different?

paturoa

27th April 2006, 23:12

I just asked them to check the exh temp and the horn which was crapy. I said check under warranty.

I've already paid.

It was all a bit too casual for me and will be going elsewhere in the future.

imdying

27th April 2006, 23:31

Check SpankMe's profile... there's a link to his SV1000 forums. It's normal for one side to be colder, as one has further for the gasses to travel (longer pipe). Heaps of people have asked the same question.

If you've got free flowing pipes, it will crackle and pop on down changes. The 03 with TRSs I rode did it heaps. My 06 with Microns does it rarely :(

If you want to fix the popping, you'll need to do the PAIR mod, which eliminates the system that adds air to the exhaust gasses. I'd like mine to pop a little more, but they haven't got a mod for that yet :lol:

paturoa

27th April 2006, 23:36

thanks all - i fell much better now, and thanks also to those who PM'd me

Now all i need to do is get it ready for the brass

http://www.kiwibiker.co.nz/forums/showthread.php?t=28176

paturoa

27th April 2006, 23:39

ah, yes I'll check the flanges, seem to remember seeing that somewhere else, thanks.

u4ea

27th April 2006, 23:47

what fuel are you using??hopefully 96 or 98 should give a better life on the pistons,91 is causing combustion ..................

paturoa

28th April 2006, 00:28

91, it pinks a little with throttle at low revs.

causing combustion ............. What?

u4ea

28th April 2006, 00:46

Pussy

28th April 2006, 00:58

the 91 isnt burning properly apparently is only about 89 so means we are getting ript big time.gunging up pistons so residual is causing a "combustion" and i am no rocket scientist but listning to the guys what are having major engine trouble on their sport bikes i am just passing on what i understand
I think "Detonation" is the word you are looking for. It's an explosion of the fuel/air mixture, as opposed to an even flame front

tl_tub

28th April 2006, 07:15

As I see it you only have one choice, go to a single sided exhaust like my tls :yes:

imdying

28th April 2006, 08:55

Only use 91 in mine, never pinks at all. Many of the guys in the states use 89 in their bikes with no problems... but I think they measure their octane slightly differently, and their 89 is about 91 in our terms anyway. But yeah, 91 works great in my SV (i.e. no pinking).

craigs288

28th April 2006, 11:48

A mates small and occasional backfiring on his TLR turned into a constant and booming backfiring under closed throttle.

Turned out to be a leaking flange where the rear pipe clamps on near the head. Sounded bloody impressive.

paturoa

28th April 2006, 12:09

Had a play this morning on the way to work and as far as i can tell it is more a cough / backfire thru the thottle bodies, than a backfire thru the exhaust.

If it is I should be able to find residue / soot in the throttle bodies. I'll drop off my air cleaner on Sat and run my finger down the inside to check for soot. I'll also check the flanges.

imdying

28th April 2006, 12:21

Ok, that's not cool, definitely let us know how you get on.

Motu

28th April 2006, 12:38

Some V Twins have different cam and ignition timing for the rear cyl,this could give different exhaust temps at idle.

cowpoos

28th April 2006, 12:43

Some V Twins have different cam and ignition timing for the rear cyl,this could give different exhaust temps at idle.
yep....and with the exhuast system on the vairing sides...the right one in a lot longer....and did the same on my TLs....the back fires and pops are nothing major to worrie about...its quite common with aftermarket cans to upset the fueling a lil...my TL used to blow blue flames out the exhausts when coming of the throttle at high revs...quite spetacualr at nite I was told!!

paturoa

29th April 2006, 11:58

Just pulled apart and the top butterflys were closed...hmmm turned on the ignitionand they opened - remember that one.

Anyway the front throttle body had a residue around the line of the closed lower butterfly which I couldn't reach. So I got a pair of long nose pliers and a cotton bud and wiped the opposite side to the injectors. Definite black sooty reside from burnt fuel.

You can see right down to the top of the the valves on the front cylinder and the black residue was mostly around the ring of the bottom butterfly as much as I could see.

The rear is harder to see and has a bend in it so can't see the top of the valves but can just see the valve stems. Anyway the ring of black soot was identical to the front. Checked it with the cotton bud and the exact same soot was there.

Hmmm unlikely to be burn valves (besides exhaust almost always go first)

I'm off to have a coffee, stand there and look at it for a while (my thinking pose) and check the flanges next.

paturoa

29th April 2006, 15:22

checked the flanges, as much as I could, had to use a little mirror and bright light. As far as I can see there are no leaks anywhere.....

Got bored with that so fitted my heated grips instead. Bit of a mission - see

http://www.kiwibiker.co.nz/forums/showthread.php?t=28291

Anyway back to the issue of the day

Any ideas anyone?

Put the original cans back on???

imdying

29th April 2006, 16:16

I wouldn't worry about it, it's just the PAIR valves doing their job. You can always do the PAIR mod, but I'd leave it unless it really annoys you.

paturoa

29th April 2006, 16:49

yours does it too?

Scouse

29th April 2006, 17:02

what fuel are you using??hopefully 96 or 98 should give a better life on the pistons,91 is causing combustion ..................Silly Girly she means Detonation

Titanium

29th April 2006, 17:23

Detonation is where the burn happens prior to piston coming to Top Dead Center and full compression.

The piston meets and explosion which is BAD. Eats away at pistons, especially on exhaust side and hammers the little end bearings and wristpins. Rather than the fuel/ air mixture being compressed then ignited as it shold.

Happens real bad in 2 strokes where timing / heat / bad fuel are factors.

Peter

paturoa

1st May 2006, 19:59

Just checked Spankme's SV1000 site - bloody good! :rockon:

http://www.sv-portal.com

Anyway did a search and found a bunch of really useful stuff. Appears to be quite common. I need to check the plugs just to make sure not running too lean.

They need replacing anyway so I'll post what I find with the plugs when I change them.

Pussy

1st May 2006, 21:04

paturoa

3rd May 2006, 22:16

Changed the plugs tonite and both good. Rear is marginally richer than the front which is a good colour.

Been checking Spankme's SV1000 site and contemplating the the TPS tune next.

imdying

3rd May 2006, 22:23

Took the baffles out of my Microns tonight... the right one was about twice as sooty as the left one, which is what I was expecting.

paturoa

3rd May 2006, 23:03

Took the baffles out of my Microns tonight... the right one was about twice as sooty as the left one, which is what I was expecting.

Clean or check? Microns are loud enough standard.

imdying

4th May 2006, 11:39

Just to see what they sounded like. To be honest, the difference is negligible. I was expecting something obnoxiously loud, but there's hardly any difference. Bearing that in mind, they look better with them out, so out they're going to stay (subject to a few days running around town to be sure they're not much, if any, louder.

paturoa

4th May 2006, 14:28

How loud when u are on the gas big time?

Does it run much different? ie more top end?

imdying

4th May 2006, 16:26

Louder than I'd be giving a warrant, if I was a warrant man. Not so loud as to be totally obnoxious though (says a 28yo male). Sounds fantastic on the over run, no idea if there's more top end or not thought, but then I'd have brought a GSXR if that was the main motivator :)

imdying

9th May 2006, 15:25

As the pipes have bedded in, they've gotten a little louder. After running about on them for a while, with baffles out it is a bit louder. How loud? Loud enough to want to behave when driving past police cars :yes:

It also has an occasional cough through the throttle bodies that I can't place. It did it three times before the 1000km service (when the mufflers were fitted), but more so now. It does it at very small throttle openings when you open it up another 10%, e.g. 4000ish rpm, 60km/h, 2nd gear cruising in traffic. Only happens sparingly, but enough to make me want to fix it.

I suspect that the combination of freer flowing mufflers, not warming the bike up fully like I did when I was running it in, has highlighted a slight lean patch in the low load, low rpm fuel map.

Any ideas anyone? How are you getting on with yours Paturoa?