Back firing into carbs

[BurnsYoFace34]

20230304_141419.mp4

Wtf is going on

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[BurnsYoFace34]

Ok so over the winter I found out I had a bent intake valve on number 2 cyl. So an awesome guy cfairwheather shipped me some parts which I'm really appreciative of. An some new coils plugs an wires head gaskets since I had to replace the head I actually had a donor bike it was a 81 gl1100 but I was told the heads are the same just use the cam shaft from the original so after some cleaning up an maken sure the valves weren't stuck got the newish head on there. The only thing I did to the right side or cyl 1 an 3 was remove the old head gasket an put the new one on I don't recall removing the cam shaft from the head. But I did swap cams on the left side cyl 2 an 4 put new belts on the bike as well used the how to from octane for reference. Made sure crank was tdc 1. An the cams were on the marks on the cam cover. I'm at a loss idk what wrong any help or advice would be great thanks

[BurnsYoFace34]

Tdc 1

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[BurnsYoFace34]

Left side cyl 2 an 4

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[BurnsYoFace34]

Right side cyl 1 an 3

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[CYBORG]

To me it is a timing issue....leaking intake valve.....or more like, sparkplug wires on the wrong plugs.

[BurnsYoFace34]

Ok so if looking at the front bike how are the coils supposed to go like the plugs wires an what not

[CYBORG]

there is a diagram some place, and in the manual. But sitting on the bike, looking at the coils, the coil on the right, feeds cyl. one and two. The one on ther left feeds 3, and 4. Again, lookng at the coils, from right to left, the order is 1,2,3,4. 1 being the front right cyl. 2 the front feft cyl. 3 being the rear right cyl. And 4 being the left rear. All viewed from sitting on the bike

[gltriker]

Ok so over the winter I found out I had a bent intake valve on number 2 cyl. So an awesome guy cfairwheather shipped me some parts which I'm really appreciative of. An some new coils plugs an wires head gaskets since I had to replace the head I actually had a donor bike it was a 81 gl1100 but I was told the heads are the same just use the cam shaft from the original so after some cleaning up an maken sure the valves weren't stuck got the newish head on there. The only thing I did to the right side or cyl 1 an 3 was remove the old head gasket an put the new one on I don't recall removing the cam shaft from the head. But I did swap cams on the left side cyl 2 an 4 put new belts on the bike as well used the how to from octane for reference. Made sure crank was tdc 1. An the cams were on the marks on the cam cover. I'm at a loss idk what wrong any help or advice would be great thanks

[/quote]

To me it is a timing issue....leaking intake valve.....or more like, sparkplug wires on the wrong plugs.

Ok so if looking at the front bike how are the coils supposed to go like the plugs wires an what not

there is a diagram some place, and in the manual. But sitting on the bike, looking at the coils, the coil on the right, feeds cyl. one and two. The one on ther left feeds 3, and 4. Again, lookng at the coils, from right to left, the order is 1,2,3,4. 1 being the front right cyl. 2 the front feft cyl. 3 being the rear right cyl. And 4 being the left rear. All viewed from sitting on the bike

ignition coil spark plug orientation.jpg (61.64 KiB) Viewed 910 times

Compression test all 4 cylinders, Again. Focus
Make sure the throttle grip is twisted and held wide open when compression testing. The choke button is fully pushed into its off position, too. Fully charged battery. Don't bother counting a recommended number of rotations.

Crank the engine until the compression testing gauge pointer needle won't climb any higher on the numbered gauge face.
Will take no more than 12ish seconds, maximum.

[BurnsYoFace34]

What about the carbs like I know I never checked the float level or even set them so wouldn't it backfire like that if there was to much fuel. The one time I got it to start an run off the actual engine was after I warmed it up with a heater an was able to use the throttle an throttle it up but as soon as I released the throttle it died but once it was running the backfire kinda sorta went away

[CYBORG]

floot level being high would more then likely cause flooding. Again, backfiring is a timing or spark problem. A few questions. Do you have a manual for the bike? What is your level of education on combustion engines? Goldwing engines are not the same as Chev. V8's. It's not that hard. I suggest you clean and set ther carbs, (or have someone do it for you),check the timing, and the advance. Check the wiring. check the sparkplugs, including the Gap, and check the compression. If all of that is correct, it will run. Goldwings are a learning curve, even for good car mechanics. If your struggling, find some one to hep you thru it, in person. Anyday you don't learn something, is a wasted day. there are several good members in your state, who have been doiing this stuff a long time. Take advantage of some of their mistakes, and learning curves.

[BurnsYoFace34]

I'm a back yard mechanic this my first bike I've worked on like this I do have a Clymers manual for the bike I just don't get it it ran fine except for a bad coil which replaced over winter. Took the carbs off then a cleaned them. Found out I had a bent intake valve ran fine till all that

[CYBORG]

All that is interesting, but what is the status of the bike right now. First Clymer is not the best manual to use. There are mistakes. Second, I know of very few people who rebuilt the carbs, and got it right the first time. Third do what I asked and report back, and we can resolve this problem

[low-side]

I had the points wires switched for the coils once and it ran like that. I'm not saying that's your situation, but it might be something to look at. A backfire is usually caused by incorrect timing igniting the mixture while the intake valve is still open but can also be caused by correct timing with a bent intake valve. I don't know of anything else that can cause carb backfires.

[BurnsYoFace34]

So the other day when I had the cam covers off an the belts off to recheck the tdc an cam gears I took the plugs out an they were soaked in fuel