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Posted

i have a 421 cheater wit no timing advance plate. my question is what is your initial timing without a timing advance plate. mine runs jus fine and has plenty torque. really dont see what i could gain bumping up the timing. i know u gain alot on a racecar bumping up the timing but i really dont see how it will help this banshee. anyway what is the initial timing?

Posted

Supposively it gives you a 2-3 horsepower range and better throttle response. It's just a easy plate to work with cause once it's installed you never have to take the flywheel off to make adjustments since you unscrew the screws around the flywheel to adjust it.

Posted

yea its a diference.....my cub was at +4 and i took it to +10 and the diference was i was launching in 2nd on the vurge of bogging and at 10 it blew 2nd gear off....

 

but if you trail ride i would run it at around +4 or 5 depends on comp and fuel.....

Posted

Im not real sure about timing either. i have a 421 cub (4mil 68mm wiseco pro lite pistons) with 20cc domes and my timing is at +4. and i was wondering what would the advantages/disadvantages be to bumping it up. or what could you even go to? not trying to jack thread...

Posted

Here is the timing curve of the stock CDI. As you can see, the timing is never at zero (TDC), like we think, ....at least I used to think that.

 

cdicurvestock.gif

Posted
nice chart...i would really like to see the dynateks 4 diferent curves on a chart like that 1......

 

i think a dyna would be the way to go if you buy program software and all....

 

 

I've got them, but don't have a scanner, and the file won't post here. For those that have a dyna, know that the "stock" curve on the dyna is NOT the stock CDI curve.

  • 2 weeks later...
Posted
couldnt agree more!!!!!

 

X's 2

 

I belive the same on drag ported stock cylinders as well.

 

I just recently went from about +3 to +7, and wow! So now its at +9 :biggrin: LOL. Just check the heat on the strap of the plug and let it rip!

  • 1 month later...
Posted
With the two cub motors I've built...I can tell you this. They love timing, they love compression, and they love fuel...period.

 

so how much of what, goes with what? how much is to much? what kinda setup do you think i should/could be running to get more outta my bike???? this will help me thanks.

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