Why is my 1988 1500 so hard to start new plugs , new fuel pump ,new filters , and carbs redone
Without the benefit of actually being able to look at a few things on the bike, I can only give you an idea. Since everything is new, there are two areas that could be a problem. The areas are in the fuel and compression areas.
I see you said that you had the carbs redone but the Gold Wing carbs have a reputation for not holding up very well. The carbs may have be rebuilt but they still might not be in the best shape. One other thing, since the bike uses an enricher system to start the engine instead of a choke, try starting the bike with the enricher on and the throttle fully closed. Some people try to "crack" the throttle when using the enricher circuit and this negates the purpose of the enricher. Leave the throttle completely closed and try that. Make sure the enricher works on both carbs too.
Next, you didn't say how many miles you have on the bike. Did you have a compression test run on the engine? If you have worn rings, a cam timing belt that is stretched, or valves that are not seating very well, you could be suffering from low cranking compression. This is cranking compression down around 50 psi or so. This is caused by the compression leaking down at the slow piston speeds when you're trying to get the engine started. Once started, the engine will run rather well but getting it started is a job. It might be time for a top end rebuild with new rings, cam drive belt, and valve job.
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