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Offline CLAY

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Maxim question...
« on: March 26, 2014, 11:36:04 AM »
So I cleaned the carbs, added a filter, etc and it ran perfectly.  Now when I start it cold, initially it starts right up and runs for a couple seconds, then dies down and quits.  After that I can get it to fire on a couple cylinders and run, but not well, and not for long.

Think the floats are out of adjustment?  Would that cause that symptom?  The weird part is that it started and ran fine after the initial cleaning.
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Offline mxvet57

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Re: Maxim question...
« Reply #1 on: March 26, 2014, 12:24:02 PM »
Petcock diaphragm?

Is there a fuel pump?

Perhaps the filter is not letting enough fuel flow.
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Offline coucours grad

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Re: Maxim question...
« Reply #2 on: March 26, 2014, 01:25:50 PM »
I'd let it quit running, close the petcock and put a drain tube on the mixers..... willing to bet 1 or 2 will be dry.



Or you get crap from the tank out of one or 2.


Tank shape doesnt lend itself to thorough cleaning.


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Offline CLAY

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Re: Maxim question...
« Reply #3 on: March 26, 2014, 04:23:52 PM »
I'd let it quit running, close the petcock and put a drain tube on the mixers..... willing to bet 1 or 2 will be dry.



Or you get crap from the tank out of one or 2.


Tank shape doesnt lend itself to thorough cleaning.

Mixers?   I put a clear fuel filter on it, so I can see fuel is flowing out of the tank.  Do you mean the connectors between the carbs?

No pump Ed- and it has a new petcock- manually operated (no vacuum).  The vac line from the intake is plugged.
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Offline Cookie

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Re: Maxim question...
« Reply #4 on: March 26, 2014, 05:05:15 PM »
I always check for a leak in the intake first. Those gaskety things and their clampy things are a bitch.
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Offline kneescrubber

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Re: Maxim question...
« Reply #5 on: March 26, 2014, 06:32:40 PM »
Cookie is on the right track. Fueling, even badly out of adjustment, is not going to run well for a while then suddenly stop running well. It looks like it was exposed to the elements for an extended period of time. That means all rubber/plastic parts are suspect. If there isn't an air leak somewhere then the electrics are suspect. It could be something as simple as dry rotted spark plug leads/caps. Those can cause serious running problems.
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Offline CLAY

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Re: Maxim question...
« Reply #6 on: March 29, 2014, 09:13:32 PM »
I'll be a checkin!  Thanks all!
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Let's do some science.

Offline coucours grad

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Re: Maxim question...
« Reply #7 on: March 31, 2014, 09:55:09 PM »
mixers=cards.....I gotta stop posting shoulder deep in squeezins......Sorry
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Offline Mac

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Re: Maxim question...
« Reply #8 on: April 01, 2014, 02:12:01 PM »
I prefer Playboy, they show more skin!!   :bigok:
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Offline CLAY

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Re: Maxim question...
« Reply #9 on: April 02, 2014, 07:17:17 PM »
So I gave her a shot of starting fluid and she fired right up.  Weird.  I put on about 30 miles tonight with no problems except for a missing second gear.   :crazy:

I'm not gonna deal with that.  It worked fine going 1-3 and I have nothing in this bike.  Time to flip her.
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Let's do some science.

Offline kneescrubber

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Re: Maxim question...
« Reply #10 on: April 02, 2014, 07:22:05 PM »
So I gave her a shot of starting fluid and she fired right up.  Weird.  I put on about 30 miles tonight with no problems except for a missing second gear.   :crazy:

I'm not gonna deal with that.  It worked fine going 1-3 and I have nothing in this bike.  Time to flip her.

I can't wait for the CL classic ad. Will you put a stuffed cat on it for the pic?  :banana: :chili: :banana: :chili: :banana: :chili:
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Offline Mac

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Re: Maxim question...
« Reply #11 on: April 02, 2014, 07:27:59 PM »
I can't wait for the CL classic ad. Will you put a stuffed cat on it for the pic?


No, but I bet it'll have custom open lead pipes, aka Catwhackers.
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Offline three west

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Re: Maxim question...
« Reply #12 on: April 14, 2014, 05:35:53 PM »
Sounds like you've already solved it, but:

mine was really cold blooded, needed to be choked for a while.
Also on the watch list should be the #1 cylinder, sometimes water can collect by the plug.

Offline CLAY

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Re: Maxim question...
« Reply #13 on: April 15, 2014, 11:23:33 AM »
Thanks a bunch.  I did solve it, and that seems to be it.  It's funny- the 650 I had years ago was also VERY cold blooded as well.  If it didn't catch well on the initial start and blip it would have to sit and sputter away at idle for quite some time before it ran smoothly.

In the 650's the mod was to get a hot coil in it- that seemed to do it.   :shrug:

No hits yet, but I am enjoying the ride on it.  Of course once I get the '75 XS650 on the road (within a couple weeks, hopefully!) I'll get more aggressive in selling the Maxim.
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Let's do some science.

Offline Meemuh

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Re: Maxim question...
« Reply #14 on: April 15, 2014, 11:25:19 AM »
Well, it is still snowing - maybe when spring hits.

Offline Dan K

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Re: Maxim question...
« Reply #15 on: April 16, 2014, 09:50:40 AM »
So I have a buddy that has my old honda shadow VT700

He can't get it started. I'd like to 'give it a shot of starter fluid' but don't have a clue how.

Can you give us a primer on a how to?


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Online Black Hills

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Re: Maxim question...
« Reply #16 on: April 16, 2014, 10:45:52 AM »
crank it over and give  a little squirt into the airbox. but, it's a touchy operation so be careful, I prefer WD-40 to starting fluid.
the above are merely the ramblings of a hamfisted fuckwit who has broken too many helmets.

Offline CLAY

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Re: Maxim question...
« Reply #17 on: April 16, 2014, 01:19:06 PM »
I had two of those!

If he pulls the airbox cover and the air filter he can send a shot right into the carb.
This was one of them that I had- my buddy still has it and takes it on our bikes trips.  It's an '86 in near mint shape:
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Remove the rectangular box just on front/below the tank (The one that says "V-Twin") and you'll be able to shoot some right into the carb while cranking.

Black Hills- why the reluctance of starting fluid?
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Let's do some science.

Offline CLAY

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Re: Maxim question...
« Reply #18 on: April 16, 2014, 01:24:22 PM »
I had an '85 like this as well, but that was a repair-and-flip bike:
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"Most accidents happen when the meek meet the douchebags."  -Viffergyrl
"The wider the road, the worse the food." -Coho
Let's do some science.

Online Black Hills

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Re: Maxim question...
« Reply #19 on: April 16, 2014, 02:18:34 PM »

Black Hills- why the reluctance of starting fluid?

I have witnessed a set of heads blown off a diesel generator, as well as other cumulative damage from using it, mostly diesel equipment. probably not that big of a deal if you use it correctly, but the terrible sounds that typically accompanies its use in a diesel makes me cringe..
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Online R Doug

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Re: Maxim question...
« Reply #20 on: April 16, 2014, 03:01:18 PM »
I didn't catch the fact this was in the Mods & Maintenance forum.  I thought this thread about Maxim Magazine.   8)
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Offline Meemuh

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Re: Maxim question...
« Reply #21 on: April 16, 2014, 03:17:28 PM »
A fine publication.  Great articles.


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Offline Dan K

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Re: Maxim question...
« Reply #22 on: April 16, 2014, 04:00:46 PM »
Thanks guys - any reason wd-40 would be less effective than starter fluid?

And Clay - yes, exact same bike. Was my first bike after a 12 year hiatus from riding after college...

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- Dan


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Online Black Hills

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Re: Maxim question...
« Reply #23 on: April 16, 2014, 04:11:15 PM »
Thanks guys - any reason wd-40 would be less effective than starter fluid?



it doesn't work quite as good, but you can run it on WD-40 for a while without damage.
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Offline chornbe

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Re: Maxim question...
« Reply #24 on: April 16, 2014, 04:14:16 PM »
Thanks guys - any reason wd-40 would be less effective than starter fluid?


Yes.

It's flammable but not quite as volatile and explosive as gasoline. Just because something burns doesn't mean it's best used in other ways. I'm not a chemist, but it's probably got some inert stuff in it, or it probably needs a WAY higher temp to fully burn, thus making it a really bad idea to use in a compression scenario. It also doesn't fume up quite like gasoline, and that's really where the magic of combustion happens.

Just use starting fluid, sparingly, and you'll be fine. Overuse is where it gets to be a problem. And, ya know, since the bike isn't a diesel, the diesel engine worries don't apply.

Diesel engines typically run in the 20:1 - 22:1 compression ratio range, I believe, thus making it explosive situations worse. Most street gas engines are between 8:1 and 10:1. The VT700 runs at 9:1.
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Online Black Hills

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Re: Maxim question...
« Reply #25 on: April 16, 2014, 04:20:14 PM »
Thanks guys - any reason wd-40 would be less effective than starter fluid?


Yes.

It's flammable but not quite as volatile and explosive as gasoline. Just because something burns doesn't mean it's best used in other ways. I'm not a chemist, but it's probably got some inert stuff in it, or it probably needs a WAY higher temp to fully burn, thus making it a really bad idea to use in a compression scenario. It also doesn't fume up quite like gasoline, and that's really where the magic of combustion happens.


chevy V-8's run on it just fine ;)
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Offline chornbe

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Re: Maxim question...
« Reply #26 on: April 16, 2014, 04:24:45 PM »
I'm not arguing that it *can* work. But the efficiency is WAY down compared to ether, and it's not a fuel.

It also leaves stuff behind.

:shrug: Ultimately, I don't care. But WD-40 or probably 60% as effective at that job as ether.
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Offline Dan K

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Re: Maxim question...
« Reply #27 on: April 16, 2014, 04:31:12 PM »
So if I drain any bad gas, or if there's only a little gas in the tank (he did NOT store the bike properly), can I just fill, say, with 70% good vs. 30% bad gas (and a load of sea foam in the tank) and start it up with the starter fluid?

I spray it first, for 2-3 seconds tops, then start, and assuming it starts, if it begins to die, is it ok to keep adding starter fluid while it's running until the good (or better) gas starts getting to the carbs?

1st time for me, but the bike is in really good shape (or was when I gave it to my buddy), and unless the carbs are totally gummed up, I'm guessing this will do the trick...

Thanks for the help!  I lost a bet that says I have to help him...

- Dan
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Re: Maxim question...
« Reply #28 on: April 16, 2014, 04:34:16 PM »
I'm not arguing that it *can* work. But the efficiency is WAY down compared to ether, and it's not a fuel.

It also leaves stuff behind.

:shrug: Ultimately, I don't care. But WD-40 or probably 60% as effective at that job as ether.

I agree, but it's usually on the shelf. if we want to get nit picky using ether due to a carburation problem is not a very good idea anyway ;D
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Offline Dan K

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Re: Maxim question...
« Reply #29 on: April 16, 2014, 04:36:27 PM »
Not sure what the issue is - battery charged, turns over, doesn't start. If this doesn't get it going, then the problem is spark, correct?

And if it's spark, then I research how to check spark and try that angle...

I will risk a little to get this puppy started. It's just been sitting a little too long.

 -Dan
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Re: Maxim question...
« Reply #30 on: April 16, 2014, 04:36:50 PM »
the above are merely the ramblings of a hamfisted fuckwit who has broken too many helmets.

Offline chornbe

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Re: Maxim question...
« Reply #31 on: April 16, 2014, 07:49:00 PM »
I'm not arguing that it *can* work. But the efficiency is WAY down compared to ether, and it's not a fuel.

It also leaves stuff behind.

:shrug: Ultimately, I don't care. But WD-40 or probably 60% as effective at that job as ether.

I agree, but it's usually on the shelf. if we want to get nit picky using ether due to a carburation problem is not a very good idea anyway ;D

True that.  :thumbsup:

Not sure what the issue is - battery charged, turns over, doesn't start. If this doesn't get it going, then the problem is spark, correct?

And if it's spark, then I research how to check spark and try that angle...

I will risk a little to get this puppy started. It's just been sitting a little too long.

 -Dan

9 times out of 10, a sitting bike ends up with carburetor issues. If it's spark related, it's usually just because of 1) oil fouled plugs that sat too long, or 2) weak spark. A sitting battery, or even a battery that's gotten a new surface charge can still be weak while cranking and trying to provide spark.

I'm going with carburetor, thought. Toss some seafoam in the tank, drain the carbs, let them fill back up and sit a while. Drain again, fill back up. Fire it up with starting fluid to get the vacuum going and suck the seafoam-treated fuel into all the working bits of the carbs. Once you get it so it'll fire up on future attempts, go ride it and push that tank of fuel through it. Pulling and disassembling the carbs is usually a last-resort thing, but sometimes necessary.
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Offline coucours grad

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Re: Maxim question...
« Reply #32 on: April 17, 2014, 12:57:19 AM »
I'm not arguing that it *can* work. But the efficiency is WAY down compared to ether, and it's not a fuel.

It also leaves stuff behind.

:shrug: Ultimately, I don't care. But WD-40 or probably 60% as effective at that job as ether.

I agree, but it's usually on the shelf. if we want to get nit picky using ether due to a carburation problem is not a very good idea anyway ;D

True that.  :thumbsup:

Not sure what the issue is - battery charged, turns over, doesn't start. If this doesn't get it going, then the problem is spark, correct?

And if it's spark, then I research how to check spark and try that angle...

I will risk a little to get this puppy started. It's just been sitting a little too long.

 -Dan

9 times out of 10, a sitting bike ends up with carburetor issues. If it's spark related, it's usually just because of 1) oil fouled plugs that sat too long, or 2) weak spark. A sitting battery, or even a battery that's gotten a new surface charge can still be weak while cranking and trying to provide spark.

I'm going with carburetor, thought. Toss some seafoam in the tank, drain the carbs, let them fill back up and sit a while. Drain again, fill back up. Fire it up with starting fluid to get the vacuum going and suck the seafoam-treated fuel into all the working bits of the carbs. Once you get it so it'll fire up on future attempts, go ride it and push that tank of fuel through it. Pulling and disassembling the carbs is usually a last-resort thing, but sometimes necessary.

 :bigok: :bigok: :bigok: :bigok: :bigok:
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Re: Maxim question...
« Reply #33 on: April 17, 2014, 08:38:46 AM »
how hard is it to get to the carbs? A lot less screwing around if you just take the carbs off and clean them properly.
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Offline Dan K

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Re: Maxim question...
« Reply #34 on: April 17, 2014, 09:19:04 AM »
Not my bike, and I've never done a carb clean. If it was my bike, I'd likely pull them and learn the ropes, but since it's a buddy who just needs to get the bike rolling, I'm going to go the starter fluid/heavy dose of sea foam route. If that doesn't work, he's on his own.

Thanks fellas, excellent advice as usual.

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Re: Maxim question...
« Reply #35 on: April 17, 2014, 09:22:07 AM »
Not my bike, and I've never done a carb clean. If it was my bike, I'd likely pull them and learn the ropes, but since it's a buddy who just needs to get the bike rolling, I'm going to go the starter fluid/heavy dose of sea foam route. If that doesn't work, he's on his own.

Thanks fellas, excellent advice as usual.

- Dan

 :thumbsup:
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Offline CLAY

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Re: Maxim question...
« Reply #36 on: April 18, 2014, 07:02:30 PM »
I'm going with carburetor, thought. Toss some seafoam in the tank, drain the carbs, let them fill back up and sit a while. Drain again, fill back up. Fire it up with starting fluid to get the vacuum going and suck the seafoam-treated fuel into all the working bits of the carbs. Once you get it so it'll fire up on future attempts, go ride it and push that tank of fuel through it. Pulling and disassembling the carbs is usually a last-resort thing, but sometimes necessary.


LOL.  This is the exact procedure I use on a "sitter" before I tear into the carbs. 
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"The wider the road, the worse the food." -Coho
Let's do some science.