New Muffler, muffled power

Echotraveler · #1 05-20-2009, 09:16 AM

hello friends,

Just got my new muffler, it looks nice, it's 1" smaller than the stock one i had.

Put it on, and i go to enjoy, i knew some adjustments were to be made because i tuned the carb for my damaged (open) muffler...it sounded too loud but it had real acceleration...

presently the carb needle is 1 slot lower than stock

just filled the tank with a between 20:1 and 24:1 (eyeballed it) its smoking more than before.

the motor start but stall, yet when you iddle it right after you start it stays iddle and after 1 or 2 minutes dies...

the acceleration is pretty bad, vibrates a lot on low rpm's and has to be throttled to the max to get going in a normal fashion. it feels as if it didnt have force to deal with the chain, but when i accelerate on iddle the motor responds resonably normal....

got the spar out and its being fouled by the oil.

the carb seems sealed and gets super cold from the ventury effect, fridge cold! looks cool a lot of condensation in the whole intake and the carb bowl........when i opened the carb i sort of found a white substance on the carb needle slots, looked like greese, but i didn't put greese there! can that be HYDRATES? also some oil is spillin out but im not sure from were......

what else!? oh yes, the right side motor cover was taken off, because i heard a mechanical sound i didnt notice before...upon inspection the cover had black powder residue...i think its the clutch breaking in...hope nothing out the ussual.

Plz help me diagnose this, i dont wanto to force this little motor......

cheers,

Arturo

Echotraveler · #2 05-20-2009, 12:06 PM

am i going overboard?!

ill adjust the clutch and carry on...maybe i was pushing the little engine a lot....im still worried about the moto vibrating so much for initial accel. i have no explanation..it didnt do this before.....

**Norman** · #3 05-20-2009, 12:08 PM

your new exhaust might be causing your poor performance is the exhaust gasket opening not covering up some of the exhaust port? Is the muffler a cat one? It could be restricted inside too much.
The white grease is hydrates forming on the carbs needle.
Sounds to me like your very oil rich with the oil fowled plug. Mix your gas/oil ratio accurately.
Put your needle clip at the second slot form the fat end for stock settings
are you gaping your spark plug at about 0.025 and if your using a light use 0.020.
spark plug wire ends good and tight in the cdi and the spark plug boot.
The cover with the black dust if its the clutch cover there will be some dust and crud there.
the mags cover if you have black dust then the mag rotor is rubbing on the cranks seal that is not good need to set the seal in a tiny bit if its not damaged/leaking same on the other side the seal under the small gear can rub the crank seal and cause the same problem just like an intake leak.
I think you might want to drain out the gas from the tank. start with fresh regular gas and 2-stroke oil and mix the gas and oil accurately for 32 to 1 mix use 4oz oil to 1 gallon of gas. I use the 32 to 1 on all my bikes unless I use a syn. oil then I don't go over 40 to 1.
I found that when they vibrate a lot it is a loose motor mount or a broke one.
Norman

Echotraveler · #4 05-20-2009, 12:57 PM

the muffler is like the stock one but the muffler cover is welded in place, ill take a pic.
the exhaust gasket is a bit smaller than the motor exhaus, but it sounds sealed.

i never thought i could have hydrates, does this mean my intake tube is a RACING intake tube?

yeah i have to learn about my mix...such an important thing, neglected!

you want me to put it back on the stock? right now its on the secont slot, one lower than stock one higher then the bottom slot.

gappin the spark plug? i thought i just needed to screw it in with my fingers...the boot seems to fit fine.

the one cover with dust was the bicycle chain side cover... ill take a pic when i get home. i dont reall understand very well this part.

ill be sure to change the gas today.

thanx for the reply Norman

last night i poored 1.7 liter into the tank and put around 2 oz of oil......i guess thats too much..i need something to measure...

**Norman** · #5 05-20-2009, 01:19 PM

any restriction in the exhaust flow will cause a power reduction. your new exhaust might not be the right one to use.
no your humidity is high and I think you have an extra long homemade intake tract both can cause the carb ice(hydrates) you can call it a racing intake if you want to its not stock more of a custom intake.

you need to measure accurately your fuel mix and shake it up good before use.
spark plug gap is very important too much gap the plug will not fire too little and the plug will fowl or get poo bridged between the center electrode and the ground electrode use a wire gauge if you have one and a regular feeler gauge if you don't bend only the ground electrode to gap it correctly be gentle as well being precise is good for good operations of any machine.

the dust on the chain side if its the chain cover, will get nasty from the grease and air born dust.
The cover with the ignitions mag rotor and coil should not have dust or black stuff in there its a sign of the mags rotor rubbing on the cranks seal you will need to correct that or the seal will be destroyed when that happens the engine will not run correctly and can destroy itself due to a air leak. to fix the rubbing seal take off the mag rotor and gently seat the seal in farther you will have to use a socket that will be almost the outer dia of the seal and very gently tap the seal in so it will not rub on the mag rotor sounds tough but its easy to do
I'm not good with liters I'm into the measurements of the USA . ozs. of oil to gallons of gasoline.
good luck hope this will help you
Norman

Echotraveler · #6 05-20-2009, 01:34 PM

ill open it up tonight see if i can get to work tommorow..=-)

i hava a nice calliper tool ill measure it for .025 and .020 when the headlight arrives

i thought the dust was there because i didnt engage the clutch completly or because i forced the engine to work when my clutch cable was damaged...

**Norman** · #7 05-20-2009, 01:46 PM

Now the dust inside of the clutch cover can be normal due to the gasket rubbing on the gears and the dust from the clutch pads along with grease from the gears. excess grease can cause the clutch to slip if it get on the clutch pads, so go easy on the grease for the gears.
under the small gear is the cranks seal it can be worn through by the gear if it rubs the seal a leaking seal will have black oily poo around it black dust before it starts to leak then it gets nasty with the oily stuff.
Norman

Bikeguy Joe · #8 05-20-2009, 01:52 PM

I would bet a thin dollar you are too rich, and the vibrations you are feeling is from the engine four cycling.
Go up one more notch and try it, same results? Go to the top notch.

Keep us posted.

Bikeguy Joe · #9 05-20-2009, 01:53 PM

Dust under the clutch cover is normal.

Echotraveler · #10 05-20-2009, 02:02 PM

ok heres the game plan

gonna take a pic of the cover and muffler

then put the spark plug to .025 (mm?inch?)

make sure the clutch lever disengages completly.

make a new batch of gas.

i will put the needle 1 slot higher than stock (note: the first times i used the motor, the temp was to high and the the iddle was very accelerated, so i had to lower the C clip on the needle)

whats "four cycling"?