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Mechanical Issue

Old 02-08-21, 01:32 PM
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Mechanical Issue

Good afternoon!

I own a 2006 Honda Shadow Aero 750cc. It stopped working over a year ago and I've never worked on it before so I exasperated myself trying to figure out what was wrong with it. I ended up getting a carburetor rebuild kit and upon removing the carburetor I found the coolant had turned into a toothpaste consistency green goo. Carburetor was the cleanest thing on the bike but I replaced the parts anyway and then flushed the coolant. I put a vinegar water mixture in there, let it sit overnight, flushed and put coolant in it again.

Bike finally works, but now when I throttle it, it stops putting gasoline into the carburetor at about 50% throttle. Just cuts out and the engine spins down. I just did an oil change to be safe but that's not the issue it seems.

I'm kinda at a loss but if I had to guess Id say I messed up the carburator when I opened it up. I opened it up again and it does indeed stop putting gas in there when I throttle it too much. I don't know how to fix it.

Any tips or tricks? I'm kinda out of beer and patience here. 😅

Thanks!
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Old 02-08-21, 01:35 PM
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buy more beer. Read some other threads here and think about it some. Welcome if you care to stay!
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Old 02-08-21, 01:54 PM
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You DO understand that this is a bicycle mechanics forum?
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Old 02-08-21, 02:05 PM
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Originally Posted by dsbrantjr
You DO understand that this is a bicycle mechanics forum?


My bad. 😂 Disregard, please
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Old 02-08-21, 02:54 PM
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make sure the hose is not collapsing. If the rubber lines are old, the likelihood of it squeezing off the feed is high. While the hoses are off, snake out the ports that the hoses go to. You can have pressure & not have enough volume.
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Old 02-08-21, 03:02 PM
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I wonder if any cyclists join up on motorcycle forums that aren't also motorcyclists and not realize it before hand?

I wonder why Honda called that bike aero? It would seem to me those crotch rocket style motor sickles would be more aero v.s. the more upright position like the Harley type stuff? I don't know.
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Old 02-08-21, 03:10 PM
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Originally Posted by veganbikes
I wonder why Honda called that bike aero? It would seem to me those crotch rocket style motor sickles would be more aero v.s. the more upright position like the Harley type stuff? I don't know.
because #marketing//
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Old 02-08-21, 03:41 PM
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Originally Posted by MooMan2321
Good afternoon!

I own a 2006 Honda Shadow Aero 750cc. It stopped working over a year ago and I've never worked on it before so I exasperated myself trying to figure out what was wrong with it. I ended up getting a carburetor rebuild kit and upon removing the carburetor I found the coolant had turned into a toothpaste consistency green goo. Carburetor was the cleanest thing on the bike but I replaced the parts anyway and then flushed the coolant. I put a vinegar water mixture in there, let it sit overnight, flushed and put coolant in it again.

Bike finally works, but now when I throttle it, it stops putting gasoline into the carburetor at about 50% throttle. Just cuts out and the engine spins down. I just did an oil change to be safe but that's not the issue it seems.

I'm kinda at a loss but if I had to guess Id say I messed up the carburator when I opened it up. I opened it up again and it does indeed stop putting gas in there when I throttle it too much. I don't know how to fix it.

Any tips or tricks? I'm kinda out of beer and patience here. 😅

Thanks!
COOLANT?
Fuel I can understand.
Did you replace the fuel filter? It may be restricted enough to allow only partial flow. You need gas and you only get 1/2/ of what you need and it dies because the mixture leans way out.
You may have to replace a couple times if you didn't clean out the tank & lines.
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Old 02-08-21, 04:37 PM
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Is it April 1?
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Old 02-08-21, 06:00 PM
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What type of coolant was in it and what type did you replace it with. some of the newer machines are coolant specific.
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Old 02-08-21, 06:07 PM
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Like Bill said, it's starving for fuel, whether it's the filter or dirty lines or even at the screen before the jet, it's not getting enough fuel and leaning itself out till it dies, unless you back off the throttle before it fully stops. I'll bet the tank is full of rust too. Give me a good old Harley any day. At least they're worth working on.
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Old 02-09-21, 04:25 AM
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I will gladly exchange it for any of my Romet folders, all of which run up to 'full throttle' if you really give the pedals enough 'gas', and will ensure you stand out from the crowd at your next bike meet.

Spare 'coolant' can be carried in the front basket to make sure it remains cool, and has never been known to take on the consistency of goo. What is more, the 'coolant' can be shared with friends, although frequent 'replacement' is recommended.

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Old 02-09-21, 08:47 AM
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Old 02-09-21, 11:35 AM
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The problem is one of the jets in the carburetor is plugged, It happened on one of my old CBR600's. Don't waste time on a carburetor rebuild. Go out and buy some "Seafoam green" and put it in your gas and drive around. Mine were so plugged it took two cans of the stuff. Try to keep it close to the speed where it stops working, and you will feel a nice surge in power once it's unclogged.
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Old 02-09-21, 03:44 PM
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Originally Posted by Buzzkill53120
oh, i bet the hells angel is scared..
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Old 02-09-21, 07:15 PM
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Originally Posted by coffeesnob
oh, i bet the hells angel is scared..
That's a facetious comment if there ever was one. haha
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Old 02-12-21, 07:07 AM
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Originally Posted by cbrstar
The problem is one of the jets in the carburetor is plugged, It happened on one of my old CBR600's. Don't waste time on a carburetor rebuild. Go out and buy some "Seafoam green" and put it in your gas and drive around. Mine were so plugged it took two cans of the stuff. Try to keep it close to the speed where it stops working, and you will feel a nice surge in power once it's unclogged.
You may be able to help clear those jet holes wit a piece of guitar string. Carburetor float level is an area of concern as well and must be properly adjusted. Too low and symptoms like yours appear.

Last edited by reconnaissance; 02-12-21 at 07:11 AM. Reason: clarity
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