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Author Topic: Harder starting all of a sudden, looking for input  (Read 11010 times)

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Offline reklessj

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Re: Harder starting all of a sudden, looking for input
« Reply #15 on: February 10, 2015, 02:48:06 AM »
Quote from: Foxx4Beaver on February 09, 2015, 10:46:46 PM
Quote from: jcm3 on February 09, 2015, 04:24:00 PM
Took the carb off (love these old two strokes, that would have been a BEAR on my 2011 YZ450 that I used to have) and removed the reed cage, all looks well.  It started better today, but still seemed like I needed to crack the throttle just a tad when I didn't used to have to do that before.

It may be that the floats are off, I'll have to do some adjustments on it and see if it helps.  It seems to run great.  Thanks for the tip.

if you say it's running great and starting ok, and providing it's not suckin air some where....I wouldn't worry too much about having to crack the throttle a touch when starting it.
 I have to do the same thing with mine when it's cold...and honestly, I prefer it that way. Before I put my new carb on, it would start without having to touch the throttle...and, sometimes if it hadn't been started for a couple weeks, it would idle fairly high the second it lit off, then I'd be scrambling to get to the choke to "feather" it for a few seconds until it settled down...but if it had been running the day before, it would just start and idle normally...a different slide or slight jetting change may have cured this, but I wasn't concerned with it.
Not that you're experiencing any of these issues, but having to crack the throttle can give you some control over how it idles on it's first few seconds of running...because one of the worst things for a cold motor, is to have it rev to the moon :-o
+1 on the cold engine thing, I hate when Ido some of the local kids top ends break em in for em the whole 9 yards. Then go over to there house with my boy on a 40° morning watch em fire it up and pin it across the yard. Makes me cringe eevery time!! I have the same motor as jcm3 and never had set to idle always had to crack it.
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Offline Brute

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Re: Harder starting all of a sudden, looking for input
« Reply #16 on: February 10, 2015, 03:54:14 AM »
Mine does this as well but it made me wonder if it is not old crankshaft seals leaking a touch until they warm up a little as I can get the choke completely off and the idle screw does nothing until it warms up just a bit.  :-P
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Offline Foxx4Beaver

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Re: Harder starting all of a sudden, looking for input
« Reply #17 on: February 10, 2015, 04:12:12 AM »
Quote from: Brute on February 10, 2015, 03:54:14 AM
made me wonder if it is not old crankshaft seals leaking a touch until they warm up

that sounds like a great recipe for....

https://www.youtube.com/watch?v=fk1jLoJP6vs     :-D
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Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline jethrobolas

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Re: Harder starting all of a sudden, looking for input
« Reply #18 on: February 10, 2015, 05:47:17 AM »
Just a noob on this forum, but have you tried changing the spark plug? If you flooded it bad, might have fouled the plug.
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Offline jcm3

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Re: Harder starting all of a sudden, looking for input
« Reply #19 on: February 10, 2015, 08:23:27 AM »
Quote from: jethrobolas on February 10, 2015, 05:47:17 AM
Just a noob on this forum, but have you tried changing the spark plug? If you flooded it bad, might have fouled the plug.

Yep, sure did.  Thanks for the input.
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Offline Brute

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Re: Harder starting all of a sudden, looking for input
« Reply #20 on: February 11, 2015, 01:56:30 AM »
Quote from: Foxx4Beaver on February 10, 2015, 04:12:12 AM
Quote from: Brute on February 10, 2015, 03:54:14 AM
made me wonder if it is not old crankshaft seals leaking a touch until they warm up

that sounds like a great recipe for....

https://www.youtube.com/watch?v=fk1jLoJP6vs     :-D

Hmmm. When I read what I wrote it does not sound very good... Sounds worse if I say it out loud... Crap.
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Offline Foxx4Beaver

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Re: Harder starting all of a sudden, looking for input
« Reply #21 on: February 11, 2015, 03:17:13 AM »
Quote from: Brute on February 11, 2015, 01:56:30 AM
Hmmm. When I read what I wrote it does not sound very good... Sounds worse if I say it out loud... Crap.

just so you know Brute, I wasn't trying to trash your post...I've always highly respected your answers/responses, I'm sure you noticed that I didn't disagree with your previous post, because it does make sense....I was just being the wise a$$ that I am, and made a little comedy out of it. :-D
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Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline Brute

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Re: Harder starting all of a sudden, looking for input
« Reply #22 on: February 11, 2015, 07:21:07 AM »
And here I thought you were trying to say "Hey Dumba$$! Best get that looked at!"  :-D
Better now then when it seizes up! I was serious when I said it sounded bad. If someone told me their bike was doing that I would admonish them to fix it or suffer the consequences. Thanks for the wake up!  8-)
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Offline Brute

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Re: Harder starting all of a sudden, looking for input
« Reply #23 on: February 16, 2015, 04:26:13 AM »
Quote from: Brute on February 10, 2015, 03:54:14 AM
Mine does this as well but it made me wonder if it is not old crankshaft seals leaking a touch until they warm up a little as I can get the choke completely off and the idle screw does nothing until it warms up just a bit.  :-P

Wellll, when I wrote this I had done some work on the bike a while ago and had just pulled it out to start/warm it up for a bit with no riding involved. Put it back in the shop and covered it up as I had to get to work. Fast forward months to now and replacing my front tire. Noticed a 'note to self' to check cable routing and hoses. Got the front tire on. Fired it up. All good now. Oops :-D
My first thing to say should have been "Check to be sure the throttle is closing all the way".
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Offline Foxx4Beaver

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Re: Harder starting all of a sudden, looking for input
« Reply #24 on: February 16, 2015, 04:31:26 AM »
Quote from: Brute on February 16, 2015, 04:26:13 AM
My first thing to say should have been "Check to be sure the throttle is closing all the way".

that sucks!...it happened to me once years ago on a 250....kill switch wouldn't kill it, luckily putting it in gear and slowly letting out the clutch whilst STANDING on the rear brake pedal shut it down.   
Since then...I've always listened for that distinct sound of the slide closing.
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Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline Brute

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Re: Harder starting all of a sudden, looking for input
« Reply #25 on: February 16, 2015, 05:02:29 AM »
Sucks that I missed it the first time.  :x Good for me that it is working fine.  :lol: Lucky the throttle was just under a little tension instead of 'open' like your 250 was. I would have to imagine there would be some kind of damage done somewhere stopping a 500 with that method.  :-o
I always check the throttle 'snap back' before firing up but obviously missed that it was 'not quite' all the way closed at rest or at least under a bit of tension.
I remember I was in a hurry to get it started because I 'had to get going' which is always a recipe for a disaster.  8-)
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Offline Foxx4Beaver

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Re: Harder starting all of a sudden, looking for input
« Reply #26 on: February 16, 2015, 06:59:17 AM »
yeah I forget what I was doing to mine...but I had the handlebars off, just laying on the front fender with all the controls still attached....
it was because when I re-installed the front #plate, I had the throttle cable OVER the #plate bolt, instead of UNDER it like it's supposed to be, which caused it to be way too tight when the bars were turned :x
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Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ
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