Powerdynamo regulator/rectifier

[Blue400]

yeah, you need to unplug the blue wire from the coil to the relay if its there.

yup. my battery was 8 yrs old. then pow.


and yes, the new regulator works with the older units.

I did that, it has spark, im Happy about that! What is a good battery to get, and is economy cycle open?

[m in sc]

Chuck likes an agm he has listed in some of his posts. me? i  have had good luck with alarm batteries from home depot. replace very 5 yrs. 

[Blue400]

I have an alarm battery in it now, it's been good but not a bad idea to replace it.

Thank you for all your help everyone, I really appreciate it!

[Striker1423]

What kind of alarm battery?

[m in sc]

this is what i use, or similar.  be aware: you have to use smaller blade connectors. Lowes has them as well. they are always in or around the lighting department, sometimes used for emergency lighting as well.

https://batteryclerk.com/products/adt-security-alarm-804302-12v-4-5ah-alarm-battery?variant=6847743361083&gclid=Cj0KCQjwsYb0BRCOARIsAHbLPhGl9WzbFZEtSdDnvzxwShra3R5BaWHp4aPgo46J8boQ9Ven0SAtjDEaAiFGEALw_wcB

https://www.homedepot.com/p/Lead-Acid-12-Volt-5-0-Ah-Black-Replacement-Battery-B-LA-12V-5-0A/306289896?mtc=Shopping-B-F_D27L-G-D27L-27_15_COMMERCIAL_And_INDUSTRIAL-NA-NA-Feed-LIA-NA-NA-COMMERCIAL_INDUSTRIAL_CommercialLighting&cm_mmc=Shopping-B-F_D27L-G-D27L-27_15_COMMERCIAL_And_INDUSTRIAL-NA-NA-Feed-LIA-NA-NA-COMMERCIAL_INDUSTRIAL_CommercialLighting-71700000052687888-58700005047732060-92700052328522653&gclid=Cj0KCQjwsYb0BRCOARIsAHbLPhGJU-_d6r8tvI9_ML1s3hXkKg2dXpXXi7oVHIzeK__Ndjm3pJDoEdgaAioREALw_wcB&gclsrc=aw.ds

[Blue400]

I believe the battery i have now is very similar to that one, i had bought it at Radio Shack. Kind of a bummer those closed up.

My key switch is original on the bike, should i replace that as well? Did anyone re pop them?

[m in sc]

yup, same battery. cant answer on the switch.

[Blue400]

yup, same battery. cant answer on the switch.

https://www.economycycle.com/shop/yamaha-rd250350400r5ds6ds7-parts/electrical-ignitions-lighting/ignition/mzb-regulator-with-built-in-capacitor/

This is the part i need, correct? It looks identical to what i have, and it says with that you can run the bike without a battery, have you ever went this route Mark?

[m in sc]

thats what you need.

you can, i did when i first got it way back, but also had a capacitor (which is now IN the regulator). However, since i run a zeeltronic controller now, i started running a battery as it needs power to fire up. Some say it doesnt, but i dont want to kick it over forever to start.  If you arent running one of those, no battery is needed. 

[Blue400]

thats what you need.

you can, i did when i first got it way back, but also had a capacitor (which is now IN the regulator). However, since i run a zeeltronic controller now, i started running a battery as it needs power to fire up. Some say it doesnt, but i dont want to kick it over forever to start.  If you arent running one of those, no battery is needed. 

I run a zeeltronic controller as well, and what a difference that makes! I will buy a new battery too. Thanks again for all the help!

[Dvsrd]

thats what you need.

you can, i did when i first got it way back, but also had a capacitor (which is now IN the regulator). However, since i run a zeeltronic controller now, i started running a battery as it needs power to fire up. Some say it doesnt, but i dont want to kick it over forever to start.  If you arent running one of those, no battery is needed. 

I run a zeeltronic controller as well, and what a difference that makes! I will buy a new battery too. Thanks again for all the help!

What are the main advantages of a variable ignition curve, in your opinion? Is your engine stock or modified? If modified, what has been done?

[m in sc]

any 2 stroke will benefit from a curve. advancing it down low with a taper down up high is the key.

down low: increases power/torque, especially when dynamic compression is low
up high, when dynamic compression gets higher and the gasses really flow, having it retard a bot keeps the motor cooler, avoids detonation.

also, a zeeltronic has a programmable rev limiter.

on my S2, i had -zero- porting , jims denco chambers and a set of s3 carbs. no head cutting, nothing, internally motor was stock, laid down 59 rwhp with a zeeltronic and an h1 cdi modified to fit, curve was almost a 45 degree straight line.  its worth it , especially on calming down 'peaky' motors.

[Striker1423]

Mark, Economy sells a zeeltronic already set up for the street, I'm curious how careful you would have to be to tune it further? I would think a dyno would be necessary or no?

It sounds like a great addition to what I've got already. Cause this motor runs pretty warm.

[m in sc]

beats me. I have no direct experience with preprogrammed zeel boxes, but i know with a well sorted motor, you don't need to swing the curve too far. Id imagine its pretty good. the HPI has a curve, seems to work well with my ported motor and flatslide 34's

[Economy Cycle John]

The zeeltronic controller we sell for the AC bikes comes with the original later Euro RD400 CDI curve. It's a mild curve.