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Message started by royblueboy on 04/02/11 at 20:22:19

Title: engine warmup
Post by royblueboy on 04/02/11 at 20:22:19

after start up with half choke, I have to go about two miles before I can take the choke off. I warm it up for two or three minutes before take off. is this normal? I am at sealevel and the temp was 72 degrees.Thanks for any input.

Title: Re: engine warmup
Post by MotoBuddha on 04/02/11 at 20:42:02

My usual procedure is to start the bike with enough choke to get it to idle. I put on my helmet, jacket and gloves while it warms up. Then I turn off the choke and ride away. That way I don't feel stupid when I discover I've been riding around all day with the choke on.

Title: Re: engine warmup
Post by royblueboy on 04/02/11 at 20:47:38

if I take the choke off, it runs really bad until it warms up. I did forget to take the choke off one time.

Title: Re: engine warmup
Post by Serowbot on 04/02/11 at 22:10:58

Just personal advice,... everybody's different, but...

In general,... if you don't need choke a start-up, you're running rich...

Idling to warm up is a waste of time and gas...

I tend to go a mile or two with choke, don't push the engine when it's cold,... and then I'm good...

... if temps are approaching 95 degrees or more,... I don't need choke... but, I still take it easy for the first couple of miles...

... idling to warm the engine, in an air cooled thumper, will heat up the metal parts faster than the oil, and cause premature wear...
...(just my theory)... :-?...

Title: Re: engine warmup
Post by Howitzer on 04/03/11 at 00:11:34

I only use the choke if a) i'm trying to warm up quicker, and b) to start up the engine. Usually I just let my engine idle without choke. In my 30-40F weather here in Boston, I usually sit around watching traffic, the birds, or people for under 5 minutes before taking off. At this point I'll have some stutters maybe as I roll on the throttle, but it's not that bad.

I definitely don't use the choke because my engine is dying out. I hope that's not why you need the choke for the first mile or two on your rides. I'd also think that at 72F, you wouldn't need to warm up nearly as long as I do. Who knows. I'm just wishing I had some of that 72F weather right now... ::)

Title: Re: engine warmup
Post by Trippah on 04/03/11 at 07:17:46

It really is an enrichner isn't it?? Usually, below 70 but above 40, the time it takes to put on helmet and gloves should be enough; if it stumbles a little, just use a bit more throttle - I am with MotoBudda on this one. 8-)

Title: Re: engine warmup
Post by arteacher on 04/03/11 at 07:22:26

I'm with Motobhuda too.

Title: Re: engine warmup
Post by kimchris1 on 04/03/11 at 07:25:36

+1..Choke out while I put on
helmet and, do safety check.
Choke in and not over rev
it for a couple miles..:) kim

Title: Re: engine warmup
Post by MotoBuddha on 04/03/11 at 08:05:04

Oh, and before Oldfeller or others chime in, the idle screw should be set so it idles at about 1000rpm. Otherwise you risk oil starvation in the top end. If the motor bogs when you start out after a bit few seconds of warmup, the idle might be set too low.

Title: Re: engine warmup
Post by royblueboy on 04/03/11 at 19:40:28

Thanks for the advice, I appreciate it.

Title: Re: engine warmup
Post by Routy on 04/04/11 at 05:29:10

Sounds like you mite be running lean in the low speed circuit.
After a couple miles of warmup, and while loafing along about 30 mph under light throttle, if it picks up speed when you pull the choke 1 click, you are !

Title: Re: engine warmup
Post by Russ130 on 04/05/11 at 04:57:17

I pull out the choke to start then push it in half way while I put on my helmet and gloves. Then put it in all the way and ride away. I would try some seafoam in the tank and see if doesn't clear things up a bit after a couple of days working through the carb. As a mechanic I can honestly say nothing beats mechanic in a bottle when it works. Be sure you are getting good gas too. I can't even begin to tell you how many cars I've had come in with a no start condition that turned out to be bad gas lately.