Author Topic: "Maxi Dwell" breaker points.. and other old stuff  (Read 7882 times)

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Offline HondaMan

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #25 on: March 02, 2008, 10:15:22 PM »
My condensers are yellow and mounted on the backing plate, they don't come with the points.

I'm pretty sure they're ordinary electrical capacitors, just need to find the type and value?

Use polyester type, for the high temperatures. Don't use mylar foil type, and ceramics will be too big.
For Honda coils, the value would be:
.24uF, 400 WVDC.
For Dyna 3-ohm coils, the value should be:
.22uF, 600WVDC.

The neon light is a novel idea: it would flash from the back-EMF of the coils, in just about the right proportion, but about 1 degree "late", electrically speaking. (Hmmm...another product?)

I might make a suggestion: since a second backing plate for the 2-3 set is not available, try setting the two so they have equal gaps, by "splitting the difference" of gap sizes between them. Then, adjust the condensor value accordingly, like this:

If the gaps come out to .016", use 0.26uF caps (Honda) or 0.24uF caps (Dyna).
If the gaps come out at .014", use 0.24uF caps (Honda) or 0.22uF caps (Dyna).
If the gaps come out at .012", use 0.22uF caps (Honda) or 0.20uF caps (Dyna).

This will "adjust" the coil saturation dwells according to the OFF time of the points for 6500+ RPM. The stock caps are probably typical Corvette, at about 0.012-0.18uF, due to the type of coils used in the cars.

The automotive points do, indeed, carry more current than the Honda-type points, as the drilled air-relief holes make a concentric, even contact surface that is about 12 times bigger than the ones in the bike (or non-ventilated auto) points. If you can't find the 'Vette parts, look for Blue Streak parts. Or, drill and bevel your Honda points with a vent hole.  ;)
« Last Edit: March 03, 2008, 06:40:36 AM by HondaMan »
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Offline andy750

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #26 on: March 03, 2008, 05:21:53 AM »
As everyone here knows, you can not always get parts same day for these. If you ever travel on your bike and are over 500 miles from home, and you have no credit card or cellphone.. what do you do when your electronic packs it in??

Some rider actually enjoy maintaining their machines..

Ok I have some experience with this.....having rode my CB750 thousands of miles from home...here is my opinion. Ive done both. Ive had points on a CB750F2 and when the condensor failed I WAS 500 miles from home...I didnt know what it was at the time so rode back home (yes 500 miles) with a crappy condensor at 55 mph. Not a fun trip. Then I got a CB750K4 and replaced points with one of those wonderful DYNA S units. Set and forget. This was done in 2001. Since then Ive rode my bike in many different countries (Mexico, Czech, Alps, Germany, Scotland, England etc etc)  -~ 40,000 miles. No cell phone most of the time  ;) Any timing problems? None. Thats my experience.

And what do I do when my bike breaks down? I always find a way to get home.....for example....3-cyilnders working and a 1000 miles from home - no problem  ;D

Dyna S is a very reliable system in my experience. Im sure there are other ways (stock, maxi-dwell) that are just as good and thats great but dont put down those that use a Dyna  8)

cheers
Andy
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Offline edbikerii

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #27 on: March 03, 2008, 05:42:42 AM »
My Dyna S has also worked beautifully for more than a decade and over 20,000 miles on my CB550K.  In all that time, I fiddled with the timing once, and that was only because I wanted to (not needed to).

To tell the truth, I bought the Dyna S when I first got my bike because I was new to motorcycles, and not confident in my ability to adjust and tune the points properly.  Plus, I didn't want to buy a timing light, dwell meter, etc.  You can time the Dyna-S statically, so no timing light is necessary -- just a $1 test light.

It is nice not to have to worry about points gap, wear, dwell, condensors, etc.  The $100 I paid for my Dyna S was well worth it.

If it should fail for any reason (like what?), I'll promptly buy another one.
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Offline Big Jay

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #28 on: March 04, 2008, 06:33:54 PM »
I took a spare set of points with me when I rode my Hayabusa from Massachusetts to Mid Ohio. ;) ;) ;)

That was a very smart thing to do. If you had a problem on the road, you can't just find Hayabusa points anywhere. ;D

Jay

fuzzybutt

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #29 on: March 04, 2008, 06:47:33 PM »
those points sound like something i'd like to try. i just had to replace my dyna-s after it left me stranded, running on 2 cylinders out in BFE. i just dont feel like i can trust it now.

Offline dusterdude

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #30 on: March 05, 2008, 11:51:18 AM »
any chevrolet v8 point set will work.you can buy the points with condensers mounted to them,however they are not solid state.
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Offline JZEROE

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #31 on: March 05, 2008, 02:40:04 PM »
You know, I know that you can get, like 1 additional horsepower out of a Dyna system, and never have to tune it, but when something goes south, you are screwed—especially if you're in the middle of nowhere. I ride with a spare set of points in my toolkit, and I've never had to use them.
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eldar

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #32 on: March 05, 2008, 02:45:45 PM »
What you point users all forget is that it takes very little to throw the points back on. The hardest part is running the wires and that is easy. So us dyna users can do that too. So we kinda have the best of both worlds. Also just so you know,   dyna you will see faster warm ups, higher mph and easier starting.

Offline Gordon

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #33 on: March 05, 2008, 03:15:44 PM »
What you point users all forget is that it takes very little to throw the points back on.

Ya know, I've never really understood that argument against points-less ignitions either.  I could swap out the dyna unit on my 750 with stock points in about 15 minutes, if I had to.

If breaking down "in the middle of nowhere" were such a big concern, I would think we'd see more tubeless rim conversions on these bikes than we do, because very few things can ruin your day on a road trip like trying to fix a flat on a tubed tire by the side of the road.   

eldar

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #34 on: March 05, 2008, 03:28:16 PM »
Yeah I am pretty sure a tube can go out easier than a dyna. A tube is certainly a LOT harder to replace than a points plate. And you dont have to carry tire irons to put the points plate on. Plus then you have to air up the tube. I know there are kits for this but again it is more tools.

That would be a good quest though, finding a way to turn a tub rim into a tubeless. Without costing an arm and leg.

fuzzybutt

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #35 on: March 05, 2008, 03:30:17 PM »
BMW has a spoked, tubeless rim but it's not possible to do it the way they do, with our rims.

eldar

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #36 on: March 05, 2008, 04:51:24 PM »
Well the main issue seems to be the spokes but the edges of the rims may also present problems.

Offline moham

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #37 on: March 05, 2008, 06:36:52 PM »
BMW has a spoked, tubeless rim but it's not possible to do it the way they do, with our rims.

can you elaborate the difference at all? my curiosity is up now...
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Offline kayaker43

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #38 on: March 05, 2008, 07:24:10 PM »
Tubes vs tubeless,.. fascinating topic for another thread.

You can slap some points on to replace a fried Dyna, but did you remember to pack the timing light and feeler gauges? If the points backing plate fits without slop, (most don't) you could pre-time it and mark the location. Even if its not perfect, it should get you home though. The built in timing light mod is worthwhile all by itself.

My point keeps getting lost here (bad pun),... Maxi Dwell is much better than a stock points system and a very functional alternative to a Dyna type ignition at a MUCH lower price. If the cost were the same I could see debating which one is better.

Lets just say the Maxi-Dwell concept is the best low buck ignition system, that's why I hate to see it dismissed and fade into oblivion. It could really improve most of the old bikes out there at an affordable price.

Offline 754

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #39 on: March 05, 2008, 07:26:05 PM »
Does a Dyna use stock advance unit?? If not then you got to pack that too.

I think you could make a Honda rim tubeless for 10 bux.. just look at the Beemer or some of the automotive wires..

I usually take a tire pump, tire irons, patch kit, if I go over 150 miles from home.. ben ther done that used them too many times... but if you stay around home you will never find out..
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Offline 754

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #40 on: March 05, 2008, 07:33:33 PM »
Eldar, is this what you mean by case closed??  ???

 It is a thread about a certain points plate BTW..

If you pack a spare plate you may as well learn to static time , its pretty easy.. If cant put a points plate in, cant change a tire,  get a crash truck to trail along..
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My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

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Lost quite a few CB 750's along the way

eldar

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #41 on: March 05, 2008, 07:43:24 PM »
I CAN static time. I am also pretty darn good at eyeballing point gap VERY close, certainly within the required adjustment range. As for case closed, that was with you.

Also this thread was about maxi dwell AND other old stuff. The idea of turning our rims into tubeless I am sure is a pretty old one.

Not sure what your problem is but get off it. Sorry if you do not like anyone disagreeing with you. get used to it, part of life.

kayaker, I agree the maxi is probably superiour to the original plate. Hell the little timing light alone is a great improvement. As for it disappearing, well there is probably nothing to stop that but with as durable as they are, it should be a long time. At least we have the hondaman unit!

Offline MRieck

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #42 on: March 05, 2008, 08:48:03 PM »
Does a Dyna use stock advance unit?? If not then you got to pack that too.

I think you could make a Honda rim tubeless for 10 bux.. just look at the Beemer or some of the automotive wires..

I usually take a tire pump, tire irons, patch kit, if I go over 150 miles from home.. ben ther done that used them too many times... but if you stay around home you will never find out..
The S uses the oem advancer. The 2000 does not
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Offline Sam Green Racing

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #43 on: March 05, 2008, 10:37:37 PM »
Hey Mike, will those Busa points fit the CR?

Sam. ;) ::)
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Offline MRieck

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #44 on: March 06, 2008, 02:52:10 PM »
Hey Mike, will those Busa points fit the CR?

Sam. ;) ::)
Sure Sam.....like a glove. :D ;D
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Offline Sam Green Racing

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #45 on: March 06, 2008, 03:16:31 PM »
 :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D :D  nearly peed my self then.

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Offline scottly

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Offline Gregorymoto

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #48 on: March 21, 2013, 08:01:42 PM »
I wish I had #$%*ing job, I want to try them so bad.
Yep, i have issues with this sort of stuff.

Offline scottly

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Re: "Maxi Dwell" breaker points.. and other old stuff
« Reply #49 on: March 21, 2013, 08:08:01 PM »
Why?? It's just Chevy points mounted on an adapter plate to fit an SOHC, as far as I can tell. The dwell is still controlled by the stock point cam, so even the name "Maxi Dwell" is misleading.
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