SuzukiSavage.com - When to not choke a cold engine?

DrunkenDwarf Senior Member Offline Morning Zombie Posts: 325 Seattle, WA Gender:	When to not choke a cold engine? 09/09/09 at 19:14:41 I was wondering if anyone else found that the engine warms up better on hot days with no choke. Any guesses on the temperature where the switch is? -D. Dwarf
Back to top	Pearl White 2007 S40; Dyna exhaust; Current jets: 52.5 w/ bleed (2 turns out) / 1.5mm (0.06") spacer / 150; raptor petcock IP Logged

voldigicam Senior Member Offline SuzukiSavage.com Rocks! Posts: 327	Re: When to not choke a cold engine? Reply #1 - 09/09/09 at 19:35:05 I just listen. Full choke only for a very short time. Then gradually click in. Doesn't take long.
Back to top	2007 S40 2003 Volusia 40th Ann. Friendsville, TN IP Logged

boofer

Ex Member

Re: When to not choke a cold engine?
Reply #2 - 09/09/09 at 19:40:59

Gasoline vaporizes slowly on cool days and faster on warm or hot days. The choke creates a rich fuel/air mixture to offset the slow rate of vaporization. That's why most of us don't have to use choke on hot days.

I would guess that each machine would be different according to tune or overall condition of the engine. Boofer

Back to top

IP Logged

drharveys - FSO Serious Thumper Offline Greetings from San Luis del Norte! Posts: 1776 St Louis MO Gender:	Re: When to not choke a cold engine? Reply #3 - 09/09/09 at 19:53:22 qn7qcw7 wrote on 09/09/09 at 19:40:59: I would guess that each machine would be different according to tune or overall condition of the engine. Boofer Are you implying that these bikes are a bit idiosyncratic?
Back to top	Every difference of opinion is not a difference of principle. Thomas Jefferson When I look fast, I'm not smooth and I am going slowly. And when I look slow, I am smooth and going fast. Alain Pros IP Logged

boofer Ex Member	Re: When to not choke a cold engine? Reply #4 - 09/09/09 at 20:04:49 Charles Manson is a "bit idiosyncratic". Our bikes are like a two year old child after a trip to Chuckie Cheese. Boofer
Back to top	IP Logged

Trippah Serious Thumper Offline I ride, therefore I am. Posts: 2517 central Mass Gender:	Re: When to not choke a cold engine? Reply #5 - 09/09/09 at 20:53:38 The point is well made..if you have to choke it to start on a day when the temp is over 60 (F) then you probably should consider making some adjustments.
Back to top	IP Logged

4carbcorvair Full Member Offline SuzukiSavage.com Rocks! Posts: 175 Maine Gender:	Re: When to not choke a cold engine? Reply #6 - 09/10/09 at 16:37:48 Trippah wrote on 09/09/09 at 20:53:38: The point is well made..if you have to choke it to start on a day when the temp is over 60 (F) then you probably should consider making some adjustments. I had to choke mine anytime it sat for extended amounts. After my main, pilot, and spacer mod, I haven't needed the choke.
Back to top	07 S40 IP Logged

JustPassinThru

YaBB Newbies

Offline

SuzukiSavage.com
Rocks!

Posts: 21

Re: When to not choke a cold engine?
Reply #7 - 09/14/09 at 22:27:49

Using a choke will flood the cylinder walls with gasoline, which washes down past the rings and into the crankcase.

Diluting the oil and increasing wear.

This, according to my Jeep wrench, is why fuel-injected cars are lasting so much longer than the old carbureted models of yesteryear...the fuel injection limits this cold-start issue and feeds the RIGHT AMOUNT of fuel for a start...no washdown, no oil dilution, less wear.

At least, when the FI is working right.

So...my own hard-and-fast rule, FWIW is...don't use the choke unless absolutely necessary. I've found my own machine starts right up cold, no goosing the throttle, no choke...this in 65-70 degree temps.

Of course it doesn't run very well under load, so I let it idle for about fifteen minutes before starting out.

Back to top

IP Logged

PerrydaSavage

Serious Thumper
Alliance Member

Offline

Riding "The
Rock"!

Posts: 3522
Republic of Newfoundland
Gender: male

Re: When to not choke a cold engine?
Reply #8 - 09/15/09 at 00:14:48

I adjusted my fuel/air screw a bit (to run a bit richer) and now Bike will start on 1/2 choke pretty much down to freezing temps. Gentle Ride for a kilometer or so then choke all the way in ... of course on a warm day doesn't require any choke at all ...
My previous '03 Savage which had stock set-up on everything, the usual ritual on a standard cool-ish Nfld, day was; full choke to start, no throttle ... immeaditly push in to 1/2 choke, idle for a minute, gentle Ride for about 1km, choke all the way in ... smooth running!

Back to top

Before you diagnose yourself with depression or low self-esteem, first make sure you are not, in fact, just surrounded by arseholes!

IP Logged

BurnPgh

Serious Thumper

Offline

SuzukiSavage.com
Rocks!

Posts: 1732

Re: When to not choke a cold engine?
Reply #9 - 09/15/09 at 01:04:35

My bike will not start at any temp with full choke. It just wont. I usually pull it out to half choke for a minute or two as per the manual. If its 70ish I dont NEED any choke but the bike starts off stumbly for a minute or so then smoothes out so I usually pull the choke half way no matter what even if only for 30 seconds or so. The only time I dont need some choke is if I've ridden within the last 4 hours. If I stop and chill at home a while and get back on within a few hours Im good.

Back to top

IP Logged

ero4444 Full Member Offline weekender Posts: 176	Re: When to not choke a cold engine? Reply #10 - 09/15/09 at 09:30:04 I don't never choke no cold engine - no how, nosirree. mine is unmodified and it starts best with full choke, let it run for 10 seconds then 1/2 choke for 3 minutes until warm.
Back to top	c2001, 3800miles, 3rd owner, adjusted idle, raised seat, Tkat brace, Raptor petcock, cleaned carb, replaced some jets, Dyna muffler, Fiamm horns, Shinkos, future Ed L. forward controls, fork boots. IP Logged

verslagen1 YaBB Moderator ModSquad Offline Where there's a will, I want to be in it. Posts: 28884 L.A. California Gender:	Re: When to not choke a cold engine? Reply #11 - 09/15/09 at 09:47:20 between you and bill I have a headache.
Back to top	Versey's Place Tech Section Index IP Logged