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  #21  
Old 03-16-2017, 12:11 PM
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Did you try the ether method I outlined above? It's helpful to confirm spark/timing/compression...if it runs on starting fluid we can then narrow the search...
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  #22  
Old 03-16-2017, 09:10 PM
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Have you tried a fresh plug. You are putting the choke on when you try to start the bike.What is letting you know know you have fuel, a wet plug. Is it spinning over fast without change in sound even when you hold throttle wide open. Was this a fresh rebuild. If fresh rebuild sometimes good to hand choke the carb to start bike the first time. Trying to get a little more pertinent info from ya.
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  #23  
Old 03-29-2017, 10:55 PM
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Default Hard starting lt80

Got a 91 suzuki lt80 that I've been trying to get going for my kids but having a hard time getting it started. With the air filter assembly on it will just crank and crank. If I undo it from the carb and finger choke it, it fires right up. I just cleaned the air filter so I know it's ok. Any ideas please?
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  #24  
Old 03-30-2017, 08:22 AM
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I'd clean the carb and do a compression check.
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  #25  
Old 03-30-2017, 08:48 AM
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I have cleaned it a couple of times. When I got it the lt80 was all in bad shape. First time I opened the carb it was nasty, all crystalized in there. I let it soak in carb cleaner for a couple days then cleaned it but could still be plugged somewhere? When I do get it running it runs pretty until it nears top end of power then it falls flat. I'm thinking of ordering a new carb since they are pretty cheap and I'll see if I can round up a compression tester. Thanks lt80. I've seen you on many of these threads and I know you know your stuff on these quads.
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  #26  
Old 03-30-2017, 10:48 AM
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You really need to remove the jets (especially the idle (pilot) jet and ensure the tiny holes are clear...everyone has a different idea of what a "good" carb cleaning is...for me, it's a complete breakdown of all removable parts, healthy run (20min) in a ultrasonic cleaner, inspection of all removed parts and then reassembly.


I leave no doubt about it's cleanliness...
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  #27  
Old 03-30-2017, 10:57 AM
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Done that. Even put brand new jets in and still the same. What has me perplexed is the very first time I got it started it screamed. Since then it's not been the same which makes me wonder if something is plugged somewhere. I ordered a new carb to try out and will update when it shows up and is installed. After that first run is when it started to run sluggish which is when I pulled the carb off the first time and saw how nasty it was in there. I have not been able to get it to run the same since. It hadn't been ran in quite a while so inside the carb stunk really bad and moving parts where stuck like the float.
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  #28  
Old 03-30-2017, 11:05 AM
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I also replaced the petcock with a regular one as I wondered if the vacuum petcock may be failing but it made no difference.
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  #29  
Old 03-30-2017, 09:36 PM
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Ok so it still would not cold start with air filter housing but it would start with it on after letting it run for a few minutes. Also ran good with the housing on, it actually would Rev full throttle. Still gonna put the new carb and #90 jet in when it shows. It is slow to take off so I'm guessing rollers are probably worn on clutch? Or could still be carb issue?
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  #30  
Old 03-31-2017, 09:12 AM
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Compression test and clutch maint now.I wouldn't worry about the 90 jet.
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