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Message started by sesamestreet on 07/10/13 at 19:44:11

Title: Bike starts but...
Post by sesamestreet on 07/10/13 at 19:44:11

It idles weird and has trouble keeping alive while warming up. It lugs as if its coughing over and over again.

Title: Re: Bike starts but...
Post by justin_o_guy2 on 07/10/13 at 19:56:46

mine idles low when first started, i jack the idle up, as it warms, idle rpm comes up, i turn it down,, notice, nothing but fingers needed to adjust idle. remember, keep it spinnin 1.000 rpm,, oil pressure,,
What happens if you start blipping the throttle? Will it rap up or does it gag & die?

Title: Re: Bike starts but...
Post by sesamestreet on 07/10/13 at 20:11:17

It revs. But like how the crappity smack do I know when it's at 1000? And also why can't it just start normally without having to adjust the idle?

Title: Re: Bike starts but...
Post by clearush on 07/10/13 at 20:19:04

I always use the enrichment (choke) when starting my bike to keep the rpms up until it warms up. That way I don't have to mess with constantly adjusting the idle screw.

Title: Re: Bike starts but...
Post by sesamestreet on 07/10/13 at 20:21:11

I pull the choke all the way, start it, then push it in halfway, at that point the idle sounds like its about to stall every crank, but it keeps going.

Title: Re: Bike starts but...
Post by verslagen1 on 07/10/13 at 20:35:33

there are 2 knotches on the choke

1 knotch out richens it up a bit but speeds up the idle too.

full out just makes it rich.

Title: Re: Bike starts but...
Post by justin_o_guy2 on 07/10/13 at 20:39:20

well,, the warning is an important one, low rpm = low oil pressure = short life, if its chugging along below 1,000 rpm, ya gotta deal with that or youll scorch the cam journals in the head,
i piddle w/ idle adjustment ever time i fire up, takes about 20 minutes or so for it to get all the right. i dont mind, its my baby, ill keep it spinning free.

Title: Re: Bike starts but...
Post by sesamestreet on 07/10/13 at 20:41:41

3E2D3A3B24292F2D2679480 wrote:

there are 2 knotches on the choke

1 knotch out richens it up a bit but speeds up the idle too.

full out just makes it rich.

Well on the first knotch out the idle sounds really irregular, and it's idling as if its dying, but it doesn't.

Title: Re: Bike starts but...
Post by sesamestreet on 07/10/13 at 20:45:10

Well it used to start fine, but I guess I started fiddling with the idle mixture screw to lessen the backfiring, and at first it ran ok but now it won't even idle normally on a cold start.

Title: Re: Bike starts but...
Post by justin_o_guy2 on 07/10/13 at 20:50:41

if its acting differently & you havent done anything, id put some sea-foam thru it a few tanks worth,, if thats no help, id have a look in the carb.
have you ever had the bowl off?
how much do you ride?
how long does it sit?
have you tried putting it on prime to make sure the bowl is full?
how about draining the bowl to see if ya get anything besides gas?
how long does it take till it starts running like it should?
if it clears up, idk how its a junk in the carb problem, butm hey, im not the carb genius, either.

one of you smart guys mite wanna jump in here

Title: Re: Bike starts but...
Post by sesamestreet on 07/10/13 at 23:59:26

67787E7964635262526A78743F0D0 wrote:

Never had the bowl off.
I ride almost daily.
Don't have prime because I have the raptor petcock.
It runs ok once it's heated up. Still has a bit of uneven idle and it skips beats regularly while I'm waiting at a red. Meaning it'll be chugging along and have one chug not happen in a steady pattern.

Title: Re: Bike starts but...
Post by justin_o_guy2 on 07/11/13 at 03:04:41

Meaning it'll be chugging along and have one chug not happen in a steady pattern.

spark plugs can do that, mite wanna slap a fresh one in, i dunno,,

raptor, good plan.

hopefully, someone will stop in & rescue both of us soon.

Title: Re: Bike starts but...
Post by sesamestreet on 07/12/13 at 04:39:58

Used some seafoam spray in the carb and its a bit better. But still needs SOMETHING

Title: Re: Bike starts but...
Post by Dave on 07/12/13 at 06:00:40

120412000C04121513040415610 wrote:

Used some seafoam spray in the carb and its a bit better. But still needs SOMETHING

If there is something in the idle circuit or pilot jet....spray Seafoam won't help. You need to use the kind you add to the fuel and it cleans while you ride.

You might also try turning the idle mixture screw out a couple of turns and then back in the same number of turns (while the engine is running) in case something got stuck in the passage at the needle.

Title: Re: Bike starts but...
Post by oldNslow on 07/12/13 at 06:41:57

Quote:

But like how the crappity smack do I know when it's at 1000?

Start it up. Put it in first gear. take a ride down the street with the throttle completly closed. If it runs along at about 8-10 mph like that the idle is pretty close to 1000.

Title: Re: Bike starts but...
Post by MeLikeBike on 07/14/13 at 14:02:43

1000 rpm sounds like this...

http://youtu.be/QImRxzVz3hg

Title: Re: Bike starts but...
Post by sesamestreet on 07/17/13 at 07:24:57

Thanks that really helps! Ne'er thought of using a metronome for this purpose. Anyways, it's idling fine when hot (a bit jittery at times and rpm fluctuating slightly) but still has a hard time staying up on a cold start. With the choke out it sounds as if its gonna die but can stay running indefinitely, then with the choke in it does unless the engine is hot.

Title: Re: Bike starts but...
Post by justin_o_guy2 on 07/17/13 at 09:26:04

Well,, Any Time its not running at least 1,000 rpm, its not okay. So, till it will idle well on its own, youd be ahead to keep it rapped up a little

Title: Re: Bike starts but...
Post by sesamestreet on 07/17/13 at 10:54:54

Ok and how do I fix the issue though? I'm already waiting on a dynojet kit and the local suzuki shop will do the work. They said that should solve the issue.