Retard!

El Sid

Member
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9:44 AM
Joined
Oct 7, 2014
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Satellite Beach, Fla
I'm pretty sure its ok if i use the word retard in this respect. I am asking anyone if they can tell me how to retard my timing to get maximum head pressure at proper RPM. Or direct me to a video anything that could get me the info I need. Came up empty on you tube.:-/

thnx,
El
 
more than likely a lifan or huasheng...

go get chainsaw file. or dremel.

remove magneto/coil, taking note which way engine spins.

file slots longer in required direction.

voila :)

or get some funky "eccentric" studs machined up...

learn how the cdi units work, and make one, or gut one from a pitbike and modify...

sure you wanna retard rather than advance? got a timing light and checked what its timed at already? done any work, like exhaust, ports, or reprofiling cams? bogging up the head to raise compression? figured out what the minimum octane it needs to make max power?


if you subscribe to the theory that more octane instantly equals more power...go do some research ;)
 
Thanks. Have been doing research which this is a part of. Lots of helpful people here. I Learned of "the loss of power" from this forum. I read that factory will set timing so head pressure maxes or before proper rpm is reached. And timing should be retarded. Thus the reason for my "retarded" thread. Everything I can learn will help. I am assuming i will know what "slots" you are mentioning when I take the magneto and coil off. Thanks again.
 
maximum RPM/speed

How to maximize RPM/speed

Both the 48cc and 66cc (80cc) engine have around 141 degrees exhaust port open duration which is enough for a maximum RPM of 7000. But these engines only turn up to 5500. Why?
1) ignition timing is too advanced at high RPM. This basically serves as an RPM limiter. Some motocross bikes with digital CDIs stop retarding the timing at about 500 RPM before the max RPM the engineers want the engine to turn at. This causes the timing to be too advanced which causes the peak cylinder pressure to occur too early to do much good at contributing to engine torque.

(This is what I read to make me wanna ask how to retard my timing, El)
 
it would work but it wouldn't be ideal. there's plenty of info on the internet for rolling your own cdi
 
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