I took the advice of Ivan H and lined everything up in vertical series on a solderable pcb board then ground off the non-needed areas with a dremel (to insure no shorting would happen). Worked great for me! ill try to get a pic of it for you.
modified cdi and cr 80 coil
- Thread starter damo99
- Start date
I took the advice of Ivan H and lined everything up in vertical series on a solderable pcb board then ground off the non-needed areas with a dremel (to insure no shorting would happen). Worked great for me! ill try to get a pic of it for you.
dracothered
New Member
As far as the SCR I am not 100% sure, but it should work just fine. Now about using switches in the place of jumpers that would be just fine as long as they aren't small low current switches.
NOTE: DO NOT CHANGE THE SETTINGS WHILE THE ENGINE IS RUNNING, THIS MAY CAUSE DAMAGE AT THE TIME OF FLIPPING THE SWITCH SETTING.
That part, BT136-600E is a TRIAC, what you need to use is a(n) SCR.
hotrod0198
New Member
i have a 48cc skyhawk motor and my magneto and the bolt it is on broke and i dont know how to fix it
Toadmund
New Member
But it's both!
(10 Pcs T0-220 Package Phase Control SCR Triacs 600V 4A)
So.......I ordered the wrong thing, I won't cry....th-th-this time.
Going to have to do some info digging I guess.
Your Right
So the question is, can I put in a diode?
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dracothered
New Member
Oops totally missed that one, sorry about that.
BigBlue
Member
I suggest you make your own post with your problem under the 2 stroke section. More members are going to see your post. Furthermore, your topic is not related to the ongoing post.
Good Luck,
Chris
AKA: BigBlue
mountain80
Member
Can I ask what the difference is on what the original Jag and the modified cdi does?? Not very electronic savvy lol.
dracothered
New Member
You have a little more adjust ability with the modified CDI and the JAG seems to be a little over priced from what I hear you get from the maker of it.
mountain80
Member
ok i have the jag unit and it crapped out after a couple of days.It took to long to get it and Living in Canada would have to ship it back etc and it is now spring. Can you fully expalain the more adjustability of the modified cdi? I see that the jag has 2 different jumpers for the advance and retard curves so 3 curves each. but this one has only 1jumper for retard curves. I am trying to maybe order the parts and get someone to help me with building one as my motorized bicycle has cooked a few cylimders with the stock one due to compression and modding etc. Thanks for any info provided.
With the modified, you can run the same settings as the "jag" but you can also advance timing if you choose (27ohm resistor jumped with 390 bridged out of the circuit)
IMO, if you don't fully understand the timing settings, the modified might be a bit too much.....coming from the guy that blew a hole in his piston by having the wrong settings
Toadmund
New Member
I told the ebay vendor of the typo, calling it a SCR TRIAC. Gave me 40% off, I got a $1.58 refund!
WooHoo!
(Still not changed though)
Hi, yeah, if u dont fully understand the jumper settings to select between the 2 variations u could easily over advance the timing. I have emailed the schematic for the stock Jag circuit & a simple vero board layout to a member & I'm pretty sure that he's going to draw them up on the computer &post them, I'll check back with him to make sure. If he's not I could email them to someone else to get posted, as I dont have a computer or know how to use one. Made on vero board & with quality components they are quite sturdy & I've made several for friends & none have failed. Cheers
Oh, & in regaed to substituting SCR's, if u do, even tho the substituted SCR may have the right or higher voltage & current handling capacity, it'll most likely have a different gate threshold characteristic, which means it'll trigger into conducting at a different time. It may not be much, but it depends on how different the characterists are. Stick to the C106D. They are cheap as, common as & were the origonal part in the KDX CDI the circuit was adapted from. Cheers
To be honest, I'm really not sure. They do produce a hotter spark than the Chinese CDI/coil unit. I suppose the only way to know is to try it. Maybe if u could find a coil designed to fire 2 plugs,,, I know they exist but where u'd find I dont know. IIRC, there r 2 types of coils, rising field & falling field (maybe), so u'd need to be sure u have the correct type of coil. Apparently the CR80 coil gives the hottest spark of all the small MX types (very hot, will spark over something like a centimenter gap outside of the combustion chamber) so if u could find a twin plug coil with similar specs I dont see why it shouldnt work. I've always used the same coil off an old 500cc dirt bike wreck & it works really well. U could easily try parralleling 2 coils off the CDI to see how it goes. Good luck with & let us know how u go with. Cheers
hsvmick
Member
thanks for your reply ,i used to use mick's cdi and cr80 coil before he sold it out to JAG ...I been playing around with a longer shaft to run two mag's but the magnetic fields are playing together, getting the thing to spark at the right time is a headache looked so cool and to my plan was then to run two mod jag cdi's retard a plug and avd one to the other plug .i was talking to Fred today and he has good ground and knowledge in how he runs two plugs with a 12volt battery gy6 scooter cdi with two coils and i think i will go this way cause i have had weeks of headache trying to come up with a two mag coil maybe still could but it is hard to know where it fires the second one being longer on the shaft maybe and the more rev's it gets worse anyway hope someday someone can nail this