My First Motorbike Project
- Thread starter gera229
- Start date
lowracer
New Member
Gera,
Here is a pic of my rpm meter & what the engine is idling at.
It can idle anywhere from ~2500 rpm's to ~3000 rpm's & never does the clutch grab at idle.
You can buy these on eBay for around $15 & they are very accurate.
There is a sensor wire that wraps around the spark plug wire to read the pulses (3-5 wraps around). I use some electrical tape to hold the sensor wire firmly to the spark plug wire.
-Lowracer-
Here is a pic of my rpm meter & what the engine is idling at.
It can idle anywhere from ~2500 rpm's to ~3000 rpm's & never does the clutch grab at idle.
You can buy these on eBay for around $15 & they are very accurate.
There is a sensor wire that wraps around the spark plug wire to read the pulses (3-5 wraps around). I use some electrical tape to hold the sensor wire firmly to the spark plug wire.
-Lowracer-
Attachments
lowracer
New Member
This link could be where the jets are mentioned.
http://motorbicycling.com/f51/thatsdax-rt-high-performance-carburetor-30472.html
http://motorbicycling.com/f51/thatsdax-rt-high-performance-carburetor-30472.html
What is the brand of your tach? I would like to get the same one if possible on ebay. Or you can give me a link. Maybe I'm idling too low on idle? My problem could as well be weak clutch springs.
Also what I have noticed is that when I revv and then go to a stop, my chain is still spinning and clutch is still engaged still (this can cause wear)? This might be the reason I snapped springs, but I am not sure?
This is either a carburetor problem or a normal operation that is actually supposed to happen.
Also what I have noticed is that when I revv and then go to a stop, my chain is still spinning and clutch is still engaged still (this can cause wear)? This might be the reason I snapped springs, but I am not sure?
This is either a carburetor problem or a normal operation that is actually supposed to happen.
lowracer
New Member
The tach is a Chinese no-name brand. Search for 'tach hour meter' & you will see many.
The chain will always turn as long as the rear wheel is turning.
The internal clutch shoes release at a given rpm & then the engine no longer provides engine braking. You may have messed up your clutch running the engine with no driver unit installed?
-Lowracer-
The chain will always turn as long as the rear wheel is turning.
The internal clutch shoes release at a given rpm & then the engine no longer provides engine braking. You may have messed up your clutch running the engine with no driver unit installed?
-Lowracer-
cannonball2
Well-Known Member
Hey LR, I just bought another tach on ebay from a seller in Fla for $13+ with free shipping. Same exact one as we both bought before.
Yes lowracer, I probably messed up my clutch. When I revved it the shoes rubbed against the engine casing and 1 spring flew out (unbroken, but greatly stretched out). The other springs were stretched out and loose, but I bent the tips of them to make them tighter, but I think they are still too loose. Maybe I will order new springs.
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What tach did you buy?
cannonball2
Well-Known Member
This one, when you check out first class mail is free, you have to check the box.Tachometer Hour meter 2 4 Stroke Small Engine Spark | eBay
cannonball2
Well-Known Member
They are very accurate. I have cross checked them with a very good quality hand held small engine tach made by Echo. They dont jump around randomly unless thats what the engine is doing.
cannonball2
Well-Known Member
They are quick enough.
Lowracer, do you attach it to the spark plug or the spark plug wire?
What I noticed is that I see no wire on my spark plug wire that I got from autozone. All I see is white stuff inside it lol. How did you manage to attach it to yours? (Assuming you have the same wire since you got yours from autozone as well)
Pictures will help.
What I noticed is that I see no wire on my spark plug wire that I got from autozone. All I see is white stuff inside it lol. How did you manage to attach it to yours? (Assuming you have the same wire since you got yours from autozone as well)
Pictures will help.
"There is no such thing as a stupid question".
gera, think or do before you ask questions. Get a piece of string. Wrap 2" of one end around the middle of a pencil. Tape the portion of coiled string onto the pencil, so that it does not unwind.
If you think the tape will unravel, ziptie the tape. That will keep the tape from unraveling, and the tape will keep the wire from uncoiling.
Sheesh!
gera, you're kidding, right?
The tach wire picks up its signal by electromagnetic induction.
Electromagnetic induction is the production of an electric current across a conductor moving through a magnetic field. It underlies the operation of generators, transformers, induction motors, electric motors, synchronous motors, and solenoids.[Wikipedia]
No metal or direct connection.
I sense that you are a very intelligent young man, and you are sincere in your question.
The tach wire picks up its signal by electromagnetic induction.
Electromagnetic induction is the production of an electric current across a conductor moving through a magnetic field. It underlies the operation of generators, transformers, induction motors, electric motors, synchronous motors, and solenoids.[Wikipedia]
No metal or direct connection.
I sense that you are a very intelligent young man, and you are sincere in your question.