Difficult cold start (and loose exhaust pipe) - SV650.org

17-11-05, 10:01 AM

I had a hell of a time starting my bike this morning (it was about -2 degrees in Cardiff).

Anyone got any tips on choke position, throttle when it's cold. With the choke off, the engine seems to start and then stop after half a second. With the choke on it doesn't seem to 'catch' so much.

Also my exhause pipe is a little 'heath robinson', it's got 3 sections - 2 of which don't have the best seal when cold, but seem to tighten up when they warm. I get the occasional backfire when it's starting - is this likely to be a big factor in my difficult cold starts?

Owen

17-11-05, 10:15 AM

Try 3/4 choke and an 1/8th throttle, which seems to work perfectly for me. I wouldn't think the small exhaust leak would make much difference to actually starting it.

.

17-11-05, 10:29 AM

Nice one jonboy,

Will give that a go tomorrow. Do you guys up the idle speed in the cold?

Mines running at ~1400 after its warmed up.

Owen

17-11-05, 11:16 AM

I do tend to up the idle during the colder months to 1500 but 1400 should be perfect. It certainly doesn't affect the actual starting of the bike.

.

17-11-05, 11:32 AM

If that doesn't work, I always found that full choke and no throttle was a good combination.

[thinking mode] I haven't had a choke since selling the SV, it's all been FI... [/thinking mode]

.

17-11-05, 01:20 PM

I only run my idle at 1200rpm and don't have any problems.

If you're on full choke, a little 'blip' as you've got the start button pressed usually works on my SV (it's a 2000 Y model).

fizzwheel · 17-11-05, 01:58 PM

My bike starts fine on cold mornings, I always try full choke with no throttle first, if it doesnt catch then I'll try a bit of throttle

I to have turned my idle speed up to about 1300 - 1400rpm

northwind · 17-11-05, 10:27 PM

Personally I reckonthat it's best to start too low and work up- too much choke can cause problems, while too little choke will just mean you don't start. For some reason mine starts best with just a little choke but then needs more to idle well on a really cold start. SO I start it, rev it a little, then up the choke.

18-11-05, 04:16 PM

Thanks all,

The bike started first time this morning - I reckon I must have flooded the engine yesterday.

Putting a cover on it for the first time this year may have also helped (Jack frost left 1/4 inch of frost on the cover this morning).

Is there any way to clear a flooded engine other than waiting a few minutes?

Owen

18-11-05, 05:16 PM

You can try no choke and no throttle and cranking it over, just dont crank for more than about 15 seconds if a carb model
.
For most modern fuel injection I think you can crank with full throttle if they have idle stabilisers, but no throttle if they dont, but that may only be for cars, not too sure about sv's, but i'm sure someone out there will know.

17-11-05, 10:01 AM	#1
owennewo Guest Posts: n/a	Difficult cold start (and loose exhaust pipe) I had a hell of a time starting my bike this morning (it was about -2 degrees in Cardiff). Anyone got any tips on choke position, throttle when it's cold. With the choke off, the engine seems to start and then stop after half a second. With the choke on it doesn't seem to 'catch' so much. Also my exhause pipe is a little 'heath robinson', it's got 3 sections - 2 of which don't have the best seal when cold, but seem to tighten up when they warm. I get the occasional backfire when it's starting - is this likely to be a big factor in my difficult cold starts? Owen

17-11-05, 01:58 PM	#7
fizzwheel Super Moderator Mega Poster Join Date: Dec 2003 Location: Somerset Posts: 3,614	My bike starts fine on cold mornings, I always try full choke with no throttle first, if it doesnt catch then I'll try a bit of throttle I to have turned my idle speed up to about 1300 - 1400rpm __________________ Look Dave, I can see you're really upset about this. I honestly think you ought to sit down calmly, take a stress pill, and think things over. K5 GSXR 750 Anniversary Edition

17-11-05, 10:27 PM	#8
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	Personally I reckonthat it's best to start too low and work up- too much choke can cause problems, while too little choke will just mean you don't start. For some reason mine starts best with just a little choke but then needs more to idle well on a really cold start. SO I start it, rev it a little, then up the choke. __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

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17-11-05, 10:15 AM	#2
jonboy Guest Posts: n/a	Try 3/4 choke and an 1/8th throttle, which seems to work perfectly for me. I wouldn't think the small exhaust leak would make much difference to actually starting it. .

17-11-05, 10:29 AM	#3
owennewo Guest Posts: n/a	Nice one jonboy, Will give that a go tomorrow. Do you guys up the idle speed in the cold? Mines running at ~1400 after its warmed up. Owen

17-11-05, 11:16 AM	#4
jonboy Guest Posts: n/a	I do tend to up the idle during the colder months to 1500 but 1400 should be perfect. It certainly doesn't affect the actual starting of the bike. .

17-11-05, 11:32 AM	#5
Jelster Guest Posts: n/a	If that doesn't work, I always found that full choke and no throttle was a good combination. [thinking mode] I haven't had a choke since selling the SV, it's all been FI... [/thinking mode] .

17-11-05, 01:20 PM	#6
Jase22 Guest Posts: n/a	I only run my idle at 1200rpm and don't have any problems. If you're on full choke, a little 'blip' as you've got the start button pressed usually works on my SV (it's a 2000 Y model).

18-11-05, 04:16 PM	#9
owennewo Guest Posts: n/a	Thanks all, The bike started first time this morning - I reckon I must have flooded the engine yesterday. Putting a cover on it for the first time this year may have also helped (Jack frost left 1/4 inch of frost on the cover this morning). Is there any way to clear a flooded engine other than waiting a few minutes? Owen

18-11-05, 05:16 PM	#10
Chatterbox Guest Posts: n/a	You can try no choke and no throttle and cranking it over, just dont crank for more than about 15 seconds if a carb model . For most modern fuel injection I think you can crank with full throttle if they have idle stabilisers, but no throttle if they dont, but that may only be for cars, not too sure about sv's, but i'm sure someone out there will know.