79GS550 help no response

[lrburke]

I posted what I thought was a very detailed post yesterday and got 0 responses. Did I not give enough info? Surely I didn't stump everybody! Come on guys someone take a stab at it. I know somebody out there has some suggestions. Please help!

[Dave8338]

To save some time...can you post a link to yesterdays post?

I'll start digging and before long...you'll have plenty of shovels on the job...

Never mind, I've got it.

http://www.thegsresources.com/_forum/showthread.php?t=149062

Is the air filter in the airbox, lightly oiled and everything sealed up tightly?
Anybody drill extra holes in the air box while they had the bit on the exhaust?
Your thought of lean is correct, I believe. As you mentioned that all the carbs are CLEAN and have new o-rings, I won't go there. How have you verified that the jets are stock? Can you get the bike to rev while on choke? Is your timing on? I'll let you start with those questions...

[Nessism]

No need for a new thread, just respond to your old thread and it will bump to the top.

I'd start by checking the points, I don't think that's the problem but it never hurts to check the basics.

Sounds like you have done your homework on the bike with the carb rebuild and so forth. When rebuilding the carbs did you verify the pilot jets were open by sticking a wire though them or holding them up to a light to verify the orifice is open?

Understand that the bike will typically require choke to get started down the road. On my old VM 550 it took choke for a few min's before the choke could be turned off. Don't expect it to run until it's warmed up some.

[lrburke]

Hey, thanks a lot for responding. I had a bear of a time getting the boots back on the carbs. The center of it was so sunk in the outer 2 would go on but the center 2 were not even close. I had to remove the metal part of the box and have my wife get her little hands in there and finally after scarring up hands etc we finally got them on and all 4 clamps tight. I guess I don't know for sure if the jets are stock but the previous owner said they were never apart. I am going to check the points and the timing first even though it started right up.

[lrburke]

This is a response to Nessism. The pilot jets are definitely clear and so are the bypass ports in the bottom of the carb throat. I will check the points as well. I did run the bike for about 10 minutes and figured it should respond to the throttle by then. Thanks

[Rudeman]

When you cleaned the carbs did you pull the emulsion tubes out and thoroughly clean them? May want to verify the fuel levels are right in the float bowls. That's a process that measures the amount of fuel in your bowls. If it's too low it will run lean on the botom end and will not repspond well to increased throttle.

[Nessism]

When you cleaned the carbs did you pull the emulsion tubes out and thoroughly clean them? May want to verify the fuel levels are right in the float bowls. That's a process that measures the amount of fuel in your bowls. If it's too low it will run lean on the botom end and will not repspond well to increased throttle.

VM carbs don't have emulsion tubes. Here is the carb rebuild tutorial for reference... http://www.thegsresources.com/files/vm_carb_rebuild.pdf

[Rudeman]

VM carbs don't have emulsion tubes. Here is the carb rebuild tutorial for reference... http://www.thegsresources.com/files/vm_carb_rebuild.pdf

Sorry...I meant the needle jets. If there's an obstruction it will not respond well to throttle.

[lrburke]

Hey, sorry I haven't replied back I was in pittsburgh today picking up an engine for a Kawasaki ZL900 that's blown up. Yes I made absolutely sure everything in them carbs is clear. I probably go overboard on carbs. I soak each body two or three times and use a can of carb cleaner for each carb and then use a water pic as a final check. That's why this is so frustrating! The exhaust mufflers have some sizeable holes in each one so I know this needs to be addressed. I also noticed that someone has put a cheap set of chinese points on this bike and they don't even come close to closing flush. I had to tweak them a little to get them right. The metal lid on the filter box is missing the gasket. Could this actually have an effect? Also the drain in the plastic air box is wide open but aren't they usually? I will address these issues and see what happens. Thanks