Motoplat Coil Compatibility
- Thread starter mtk1977
- Start date
moebiusgold
Member
I've used both of the more common ones from the vintage bike and kart side of things with no problems. Have to originally come from their electronic ignitions. They did make point ignitions at one point and those will not work. PVL does make a compatible coil BTW. If you rubber mount or remotely mount with good ground they are almost bullet proof. There is a diode inside the coil that can go bad. Usually caused by a bad ground but just like anything there is a life and the older it is .... You could have gotten a PVL rotor compatible with the Sudam crank taper or a stator compatible with the way the stator index to the case indexing. There is a complete motoplat non matching on E-Bay for $85 right now. Non -Matching but retimed.
rainman
Member
Not trying to change the topic but I would love to find a double one for my twin spark IDK ICA 100. Hard to find them. I know some of the Spanish motocross bikes used them because they had twin spark heads like my 90s IDK Spanish kart engine. Never had it since I bought it with a single coil using it on one of the spark plugs, and changing into the other if we had a restart..
Take a look on ebay some Harley's used the twin plug motplat coil. Running on one plug drops almost 800rpm, use high octane fuel to prevent detonation, turned m ine to 19200 rpm without much effort I really liked the engine reliable fast and easy to tune. But I think I will sell it, I have too many engines and I am not getting any younger (74). IDK also had 2 different head designs.
Mike berg
Mike berg
rainman
Member
I know Mike, but i have recently talked to some of the old mechanics working for Arisco/IDK and told me the reed twin spark like the one I have gave them too many problems with the twin spark working, something I never had with a single. On the contrary they told me Faluga got more involved with the rotary one, the Terminator as I think it was known in England. Seems like the reed with the twin used to mess pistons pretty bad and they could never tune in good, so they preferred the single spark plug head version. Mine never had issues using a single coil, though as you say it probably run at lower rpms which anyway it is what I wanted back on those days since I always ran it very rich because I was on a very very low budget. I understand at 19,200 rpms you are talking about the twin rotary or Terminator, right? By the way, I could never locate Beltran. I had found some double Motoplat coils on eby from different bikes, but I wonder if they could be use with any Motoplat stator, or they are specific, and besides I don't know about the condition they were, they looked in pretty bad shape. I would love to be able to build a" twin twin" for my laydown, twin spark twin engines, lol.
moebiusgold
Member
Did you try the F100 spirit of the 90's part FB page? Call Pippo? Good luck, like looking for hens teeth. BTW you can figure out the compatibility if you know a good EE. The red Motoplats need a coil in a very odd by other standards primary winding resistance range as I remember. What the secondary is doesn't matter. Also a lot of the model number differences had to do with wire lengths but were otherwise identical. Only 19,2k! I "accidentally" turned well over 20 k last summer with an old MRC ATK rotary. That really takes the life out of pistons and rods but sounds sooo good. First gearing guess was a bit off.
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Hi here is what I remember, we thought 2 plugs set up 2 combustion fronts which collide with each other = detonation ( twin plug IDK ) so we disconnected 1 plug and ran with a single plug coil ( as I remember ) immediately lost rpm and power over 500 rpm, Spain sent us a second head new style combustion chamber, same result. NOW we never really had any issue as we ran 110 octane gas without this Iam sure we would have had problems, IDK had all kinds of issues all related to quality control and non-CNC production. As far as the Terminator engines I have a Faluga tuned Terminator RV engine, it is fast, won KART nationals with years ago running against Margay sponsored kart with IAME 125cc reed, we lapped them in about 6 laps, they went home after 1st heat. I don't know how many RPM that thing turned but it was brutal much more then the reed pistons just one day, and that is if you didn't practice too much, I never broke one but I never pushed it. Only problem was this was just too exspensive a class to run as the tires were everything, in fact, I remember one year we entered a money race with Tom Argy doing tech. we had one kart and one engine, he was not going to accept our entry as we did not fit his vision of a pro kart entry, I don't have much to say about him. Anyway, I would like to sell both engines, and I have a single plug reed too. The Terminator on aly and DDrive would be extreemly fast, the twin plug reed on good fuel or alky would solve the detnonation problems, not to mention the modern Vertex pistons, the old piostons from Konig were OK and cheap but soft. What happened to all the tooling molds from IDK/DracKart/Arisco?? Beltran and his wife came to USA and visited me and we all went to Charlotte for N armeican champs, we raced Drac Kart with Terninator, good driver, but he had zero wisdom we struggled but found speed just b4 main races, driver messed up carb drove thru large puddled ( it rained ) anyway screwed it all up. funny deal, I let Beltran drive my new Jeep Grand Cherokee back to hotel in Charlotte, turned left when crossing Nascar track and took a lap around motorspeed way, I pan icked told his wife to tell him floor it and keep mit floored ( he did not speak english ) we hit turn one maybe mid track width, car slid down onto apron "scary" then we got up to maybe 90ish going into #3 stayed up until exit then started to slide down "very scary" then we saw al kinda flashing rewd lites and were escorted off the premishes.
rainman
Member
Yes, I know you told me that story about him. Most members I have found from the team/factory can't locate him. The engines/karts were fast. Consider Alonso has always said they were the hardest competition he has ever faced. He won the Nats in Spain several times because he was the best, but very frequently the Arisco team has fastest karts than his Parilla/MW. I do not like using alky on my 100s. No idea about where all the factory materials finish, may be Faluga keeps something. I know he has some engines.
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rainman
Member
I always try to keep in contact with these guys from F100. especially when I need parts. Thanks.
moebiusgold
Member
My "bucket list" contains going there and down under for DD fun. If I have any money left after this COVID-19 mess is over.
rainman
Member
One of them even offered me a ride to race with thm during some of the summer when I usually travel to Europe. I told them for that I would rebuild my old Arisco with the twin spark ICA DD twinn spark IDK. That would be a great experience. Here I still have one DD on a late nineties Tony powered by a rotary Ital. That's the more fun I still have when I am on that kart. Where are you located? Would love to put a group together for practice or even make some races.
moebiusgold
Member
Sounds like you too have some good connections over there. I have a '92 Fullerton Tiger that I have an MRC ATK92, a pcr PC93, and a CRG S20-T1 that I rotate between. All DD. I also have a '87 Invader Dark Star with a K35 on it that I actually race vintage with. Only one at Adams with DD last Feb. I'm in N Oregon on the Gorge. I was planning on hitting up Newcastle in June and making a big swing around the East coast as I have many old friends and family that I haven't seen in ages but that is probably delayed at best right now. It'd be so fun to meet up with you, maybe Mike G and do a day at Go Pro or somewhere to your guys liking if you aren't in Europe. I'll have 4 karts and a stack of engines and spares with me as karting is the real excuse to be back there. Just can't tell family and friends that. There is always next year too. I'd ship my karts to the far corners of the world to do DD but everywhere else you have log books and more. Down under they'd love my '78 Hartman if I took the axle clutches off and put sprockets hubs and VeyVeys on it. You probably know exactly who I am by now. Please, by all means, stay in touch.
rainman
Member
Go Pro in Mooresville is my favorite around here since it is a copy of the old Parma track in Italy. Carolina Motorsports Park in
Kershaw, SC, is another nice track to go for practice and some fun Nice facility and good track.