Billyboy (popping)

[Tundra]

Great post Doug.  cooldude Nice riding with you as always. Still have that popping.  tickedoff
I'll look into it this week, everything is tight I guess i'll pull the tank and look further.
   Talk soon. Bill

Hey Billyboy,
 Check your upper & lower boots, all vacuum caps.  I have an inch lb. torque wrench for your header bolts. You said you de-smogged, so that will make much less rubber to look at.
  If you want, bring it over this weekend. We'll find it.

[billyboy]

Thanks Doug; I tightend all the boots, checked the the intake, exhaust, all is good with that.
Been desmoged and have just 1 vac line. It only pops when I let off the gas and just start
to accelerate and it just goes pop once.   Going to pull the tank for a new air cleaner and I'll
check the vac line for the fuel. The caps look good but I guess I'll replace them anyway.
Anyone else hear have an idea. I'm hoping to make it to up state New York in about a week
or so and I sure would like to get this fixed. Thanks Bill 

[John Schmidt]

Did you check/tighten ALL hose clamps? There's more than six. Also, when you removed the airbox to desmog, one hole in the bottom has to be plugged. And when reinstalling the airbox, you can often catch the top of one of the rubber intakes, causing it to curl under allowing an intake air leak. Just a few things to look for.

[billyboy]

John thanks for the post. I did tightend all the clamps (12). It's like a back fire, just once.
 I will look for what you said about the air box. It was desmoged over two years ago and just
 started 3 weeks ago.  ???  Thanks again

[indiandave]

Billy
 Make sure your Oring's on intake are good look for a yellow to brown stain. when I pull the add on chrome on my bike found the leaks. If none seen - Spray some brake cleaner or WD40 at the head where the intake mounts to the head and see if you get a RPM change if you do change the 6 Orings out.

Note I like brake cleaner as No  resadew. WD40 , carb cleaner, or starting fluid will work but there is always a chance of flash fire if you do not know what you are doing.

[Thunderbolt]

Check the O-rings like Dave said.  And you can use what you want to do the rpm change test that he suggested, but take a look at this article.  I just looked it up again to be sure I remembered the situation correctly.  If you burn brake cleaner it causes a very poisonous gas.  And Dave I am not attempting to be negative about your post.  Just be careful out there we never know where danger lies.  I was a volunteer fireman/Fire Chief for quite a few years.  When we started we didn't have breathing equipment.  But they were using more and more chemicals in furniture and glue etc.  We eventually got some.

http://www.brewracingframes.com/id75.htm

[indiandave]

Check the O-rings like Dave said.  And you can use what you want to do the rpm change test that he suggested, but take a look at this article.  I just looked it up again to be sure I remembered the situation correctly.  If you burn brake cleaner it causes a very poisonous gas.

http://www.brewracingframes.com/id75.htm

I did not know this but is great to KNOW.

But when I'm checking out a runnig car/bike/aircraft/anything I almost alway had it outside or very very well vented.  I had a friend losted a long time ago from a flash fire when he was working on a farm in a barn. If you are spraying on intake the only burning should be in the bikes eng as the intake is a vacumm sucking it into it. That is why you are looking for a RPM change.

[billyboy]

Thanks guys for the info. I did the spray test thingy at all points of vaccum with the tank on.
I pulled the tank today and the vac line on the petcock just kinda dropped off when I lifted the tank and it was a bit hard. So I think I found the problem. Will take a test ride in the a.m. just to see.
Thanks again.    Nice to know we have some great folks here who are more than
willing to help. Peace out.        

[IamGCW]

Billy,

If you change the intake O rings clean off the brown stuff.  That way when a leak starts you get an indication of what is happening. 

I also have a popping at Decel that just started a few months ago.  I ordered the intake O rings from redeye and Friday got time to install them and a new air cleaner.  The vacuum plugs and fuel shutoff vacuum lines were also replaced.  Previous to this (1 month) the exhaust seals were replaced.  My cobra six pipes have just been ceramic coated so new seals go with the newly coated pipes.  The popping is still there.  I torque the exhaust nuts to spec.  The smog crap has been removed for years.  My thoughts now are the flanges for the exhaust are sticking on the studs for the exhaust.  So I hit the correct torque, but the seal is not completed.  Excessive work travel has slowed my working on the bike for now.  Thought this might help you.  Since these are one to one pipes I can find the exhaust leak(s) [should they be leaking] by covering the pipes one at a time.   

So
 desmog for years no popping
 cobra six pipes for more than a year no popping
 Started popping
 cobras ceramic coated cause they blued
 new exhaust seals
 Still popping
 new intake O ring, air filter, vacuum lines, intake boots checked and found tight
 Still popping

Will be checking for leaks and if it still pops may put on the original pipes for the winter rides.

Curious, where in upstate NY?

Gil

[billyboy]

Hey Gil; Pulled the tank and the vac line just fell off the pitcock.    Changed the vac line
and all is good. Rode the piss out of it today and no poping. All is good.    
 Going to Lake Placid in about a week or so. Want to ride along? 
        Ride Safe Bill   

[IamGCW]

Thanks for the invite, would love to go.  Upstate was home once.  But work demands are high just now. 

Glad your popping is fixed.  I found the old exhaust seals and I can see the leaking areas.  I think the Cobras are flawed on two pipes and not perpendicular to the mating surface allowing a 0.125" gas leak.  Just enough for a popping.  It would be nice to find other seals and see if that would help.  It is not so bad that I am in a rush to fix it. 

Gil

[billyboy]

Gil; I think popping on decel is due to exhaust leak. I would check that.
  Where in N.Y.   

[IamGCW]

Gilbertsville.

[billyboy]

Gilbertsville.

Where is that . I'am not used to it up there.

[IamGCW]

Oneonta, Norwich, Sydney are around it.  SR51 runs through it.  Google Majors Inn.  Small town with less than 1,000 people. 

Gil