Man, stop scaring me like this, PINGING.
Check compression & then check ignition timming that you dont have it advanced to high.
Pingings not good & you need to know what is causing it before its to late & you end up seizing it up.
Neil

 

could the ignition timing have changed at all over time? installed it about a year and a half ago, and has been perfect since. ill check compression today. it is called pinging isnt it? that studdering like the plug is fouled a bit? or am i mistaken? any idea on plug gap for BR8ES?

 

Any chance you have carbon build-up in the combustion chamber?

I think most run 0.18" gap on that plug with a stock ignition, don't know what is recommended for the CR ignition.

 

From what I gathered is that the cr should be around .024". Have you really cleaned it out since your slow ride thru the trails. If it was enough to foul a plug your silencer packing is probably soaked as well and maybe some standing fuel in the crankcase. Just a thought??

 

it is called pinging isnt it? that studdering like the plug is fouled a bit?

I call that blubbering or loading up...

pinging is that high pitched ting of metal exploding due to detonation...

 

there is a good chance i have excessive fuel in eh crank case. only took it up the street after the plug change. and as far as the silencer packing being soaked or packed, no packing, no problem. my compression gauge must be busted, im only getting 122-124 after a ton of kicks. that cant be right. it was pulling my 220lb ass around no problem the other day. ill have to get a better gauge, and give it another go. i am however, leaking ALOT from around the pipe, where it meets the flange. its a real gusher. could i be too rich? i know they can leak a bit, but this is alot.

 

QUOTE(jeffz0rz @ Feb 16 2011, 12:50 PM) index.php?act=findpost&pid=61191there is a good chance i have excessive fuel in eh crank case. only took it up the street after the plug change. and as far as the silencer packing being soaked or packed, no packing, no problem. my compression gauge must be busted, im only getting 122-124 after a ton of kicks. that cant be right. it was pulling my 220lb ass around no problem the other day. ill have to get a better gauge, and give it another go. i am however, leaking ALOT from around the pipe, where it meets the flange. its a real gusher. could i be too rich? i know they can leak a bit, but this is alot.

If you are going to run a silencer, it needs to be packed properly, if you removed the packing, as you said “no packing” , your engine will perform poorly specially on the mid to bottom end. Otherwise, just remove the silencer…

If it is pinging, it will sound like a high rev small displacement engine, like a 125CC and not like a 250CC engine. Pinging could be caused by many different variables including air leaks…

If it is “blubbering” or loading up, is it doing it from quarter to half throttle or from half throttle to full open or both?

Get a good compression gauge, check compression. I would also check for air leaks. Good practice is to seal all connections from intake trough the complete exhaust system.

Plug gap from .020”-.024” is a good place to start; always try to gap at the largest gap your engine will accept and run best at…

Carlos.

 

its loading up from quarter throttle to half, and on the top end as well. ill warm it up and take it out for a spin and see if it clears up a bit. i will still get a hold of a good compression gauge, and check it. as far as a leak down test, just plug up the exhaust and intake, and put a bit of air into it? i have a gauge and valve that i made to go into the plug hole. how much air should be used in the test? i dont want to blow out a seal.

 

QUOTE(jeffz0rz @ Feb 16 2011, 02:41 PM) index.php?act=findpost&pid=61203its loading up from quarter throttle to half, and on the top end as well. ill warm it up and take it out for a spin and see if it clears up a bit. i will still get a hold of a good compression gauge, and check it. as far as a leak down test, just plug up the exhaust and intake, and put a bit of air into it? i have a gauge and valve that i made to go into the plug hole. how much air should be used in the test? i dont want to blow out a seal.

6-10 PSI for 5 minutes minimum, and yes don’t go to high on the pressure…you want to test from the intake boot through the exhaust, or vice-versa, with Spark Plug in place & tight.

Should hold air pressure for 5 minutes without drop, if it does leak, use a water/soap solution in a spray bottle to track down the leak looking for air bubbles…

Carlos.

 

When checking compression with gauge, hold throttle wide open & kick the kick starter 5 times each like your trying to rip the kick lever off. Read gauge after 5th kick, see what you got the keep on kicking to see how high it will go.
Neil

 

pulled the plug, gapped it to .024 (was at .040!), came down a few jets from 180 to 174, and she purrs. dont know why it was blubbering, but it seems all cleared up now. stil have to do a proper compression check, but im not as worried about it seeing how well it ran after the plug and jet change. thanks for the help once again.

cleaned the motor down real well, hopefully going down a few jets might clear up the huge amount of spent fuel im getting leaking out of the exhaust manifold. i know i have to get a new seal, but there should be hardly anything coming out of the motor right? if my engine is functioning efficiently, there should be hardly anything in the exhaust chamber right ? . im actually worried about pulling that pipe apart and seeing the build up. might have to get it boiled out.

 

Yeah that .040" was a little much. What kind of premix do you use and what ratio?

 

I'm running k2 @ 40-1. So what's about it being bad to run a silencer with no packing? To be honest, there is no center tube for there to be packing around. Lost it on the freeway. yes its way too loud, but I always ride with plugs in anyways.

 

QUOTE(jeffz0rz @ Feb 18 2011, 07:11 AM) index.php?act=findpost&pid=61352I'm running k2 @ 40-1. So what's about it being bad to run a silencer with no packing? To be honest, there is no center tube for there to be packing around. Lost it on the freeway. yes its way too loud, but I always ride with plugs in anyways.

Silencers are designed as an extension of the stinger; part of the effect of the “packing” (besides silencing or lowering db’s) is to prevent sound waves from bouncing back into the expansion chamber by being absorbed as much as possible by the packing material.

Once the packing material is oil soak or removed, the waves bounce easily of the walls of the silencer chamber or oil soak packing, affecting the resonance of the expansion chamber. You are best to remove the silencer if it is not packed properly or oil soaked…you will get better performance from your engine.

On a Dyno, you can clearly see the effects of a new packed silencer, verses one that is oil soaked verses a silencer with NO packing and ultimately verses no silencer at all.

Carlos.

 

quiet a science goes into those little bastards. i had no idea.

 

I can also confirm that bad packing in the silencer will cause a performance issue. Once I let the silencer go too long and I felt like there was a power loss. Boy I was shocked at how much more power it had after re-packing the silencer.

 

well, after i figure out what pipe is going to give me mid to top end in the dunes and the drags, ill have to get a new silencer.