popping on deceleration

[Guest]

Apparently humor doesn't translate well over the internet.

Or some people don't have a sense of it.

I thought it was funny..
Just so ya know..

 

[Iommiguy]

>Popping in the zorst usually happens for two reasons:
>1. A super-free breathing exhaust, eg. straight-through pipes, or a >megaphone' muffler, or some other custom loud sparingly-muffled setup.

Hey guys, this is exactly the kind of muffler I have on my '80 GS850, thanks to the PO. I also get the popping sounds when decelerating. Is this harming the engine at all or something I should be concerned about? Thanks!

 

[Guest]

>Popping in the zorst usually happens for two reasons:
>1. A super-free breathing exhaust, eg. straight-through pipes, or a >megaphone' muffler, or some other custom loud sparingly-muffled setup.

Hey guys, this is exactly the kind of muffler I have on my '80 GS850, thanks to the PO. I also get the popping sounds when decelerating. Is this harming the engine at all or something I should be concerned about? Thanks!

How do your plugs look?

 

[KEITH KRAUSE]

The popping could be related to lean or rich conditions or even a semi-fouled plug.
But since you are aware of the air filter not seating/sealing right, then correct that first. If the popping continues then we'll go from there.

 

[tfb]

There's an article on the U.S. Mikuni website which explains popping in the zorst:
http://www.mikuni.com/tg_backfires_in_exhaust.html

OK, it's for Harleys but the theory applies to any exhaust system.

 

[Texasgs]

re

re

There's an article on the U.S. Mikuni website which explains popping in the zorst:
http://www.mikuni.com/tg_backfires_in_exhaust.html

OK, it's for Harleys but the theory applies to any exhaust system.

Great writeup at Mikuni on the subject. I have become so accustomed to the popping and other raspy noised on my 82 GS1100E when I let off the gas, that it is almost like its heart beat. Instead of being a problem, it lets me know all is well. It has a super free flowing exhaust, and is jetted just a little fat, or rich, and it still spits, bangs and growls, when you let off of the gas. It's actually a hardcore melody that only a true motor head can enjoy. I think I am going to record it and set as a ring tone on my phone LOL.

 

[doctorgonzo]

I gave up on trying to get rid of the deccel pop on my G. I think it's normal. I don't see much way you could go from pouring gas in the chamber from a 160 main to instantly on the pilot without some pop while the speed of the engine catches up.

 

[doconabike]

haha ok it seems like the popping may not be that big of a deal which is good. So far, we've cleaned the carbs (didn't replace o-rings or anything did it before I found this site but its running pretty well). Replaced tires, going to replace brakes. I'm not sure what you mean by syncing carbs, but I'm sure bikecliff will have something there so I'll check that out. The idle is a little low (<900) I'll increase that but its not given me any problems.

Now valve adjustments. How important is this? The only reason I ask is that the bike is running (IMO) fairly well right now and I'm scared that opening it up may cause more harm then good. With the way school is right now (medical licensing exam coming up in june ) time is at a somewhat premium. On top of all that I'm mechanically inclined but not experienced (and the bike has 6xxx miles!).

 

[doctorgonzo]

haha ok it seems like the popping may not be that big of a deal which is good. So far, we've cleaned the carbs (didn't replace o-rings or anything did it before I found this site but its running pretty well). Replaced tires, going to replace brakes. I'm not sure what you mean by syncing carbs, but I'm sure bikecliff will have something there so I'll check that out. The idle is a little low (<900) I'll increase that but its not given me any problems.

Now valve adjustments. How important is this? The only reason I ask is that the bike is running (IMO) fairly well right now and I'm scared that opening it up may cause more harm then good. With the way school is right now (medical licensing exam coming up in june ) time is at a somewhat premium. On top of all that I'm mechanically inclined but not experienced (and the bike has 6xxx miles!).

Pretty important, and probably just about due for one. The performance will steadily degrade and then eventually you'll burn the valves.

 

[KitKat]

if you adjust the valves, a fairly simple task (even i did it ), it cannot hurt the bike one bit. It makes running and shifting smoother + starting a lot easier (if it was hard to start in the first place).

No harm can come if you do it right. There is a video that is extremely helpful, with a step by step process:

http://video.google.com/videoplay?d...IfMqgKftYFa&q=gs+500+valve+adjustement&hl=en#

its on a gs 500 closer to modern one, but his valve adjustment process is the exact same on our bikes, and he gets perfect camera angles. This video inspired me to do my valves! you can skip the first couple minutes because that is just him removing his seat and side covers and tank...

Good Luck!!

 

[doconabike]

if you adjust the valves, a fairly simple task (even i did it ), it cannot hurt the bike one bit. It makes running and shifting smoother + starting a lot easier (if it was hard to start in the first place).

No harm can come if you do it right. There is a video that is extremely helpful, with a step by step process:

http://video.google.com/videoplay?d...IfMqgKftYFa&q=gs+500+valve+adjustement&hl=en#

its on a gs 500 closer to modern one, but his valve adjustment process is the exact same on our bikes, and he gets perfect camera angles. This video inspired me to do my valves! you can skip the first couple minutes because that is just him removing his seat and side covers and tank...

Good Luck!!

Ok its something I will do. Before I start, are their any parts I need to order, ie like gaskets or o-rings or anything? I skimmed through bikecliff's pdf, I get all the measurements first and then order shims right?

 

[KitKat]

you'll need to order the two gaskets i believe, for the cylinder head cover then the breather cover. also you could get the shim tool to make it easier, but other than that i don't think so.

Also NEVER rotate the crank without all shims in place, and never take out more than two shims at once!

# 2 and # 9 on this page

http://www.bikebandit.com/1982-suzuki-motorcycle-gs650gz/o/m6096

you might find better pricing at a different vendor

 

[terrylee]

Why not try the shim club on here? terrylee

 

[tfb]

haha ok it seems like the popping may not be that big of a deal which is good

Careful! The popping *may* indicate a lean condition; you should check this out before relaxing!