NOTICE: MODELS WANTED FOR VINTAGE CDI DEVELOPMENT
We are always open to new product development, and often reach out to the public to borrow or purchase specific vintage snowmobile or motorcycle models for R&D / CDI development. Almost every CDI we’ve developed since 1998 has come about this way. Your help will result in a FREE CDI!
We are located in SE-Michigan, about 40 miles North of Detroit (South of Port Huron). So if you have a particular Vintage snowmobile or motorcycle model that no longer has a CDI available, please contact us via e-mail link below: Your help will result in a FREE CDI for your efforts!
SNOWMOBILES WANTED FOR CDI DEVELOPMENT:
(No specific order to listings below…Engine Must Run)
ARCTIC-CAT: 4-plug Kawasaki F/A-T7 engine (1975-El-Tigr’es’ etc)
SKI-DOO 81 9500 BLIZZARD
John-Deere Liquefier 1980
KAWASAKI INVADER 78~82
RUPP / Xenoah engines (may have found one)
Secret Behind the scenes development: I’m finally back working on a design that I’ve started/stopped & restarted many times over the past 15 years or so. Always got to the 50% point, then had some issue that sidelined it until I was able to think through it. Recently an idea popped into my head, so forced myself to get back working on the design. This time I made some major progress moving the design forward. Details below:
A POINTS /CONDENSER to CDI CONVERSION MODULE DESIGN:
7/11/19: The video below shows the prototype CDI / High Energy Ignition system that can be triggered with the standard OEM points that exist in older engines. This will allow a conversion from points/condenser to a high-energy CDI type ignition.
The prototype is triggered using a signal generator on the bench,. This allows simulation of RPM. The “clicks” heard in the video are switching the RPM rate. The spark rate increases & decreases w/RPM. The design can maintain consistent spark energy to 20,000 RPM (you hear the click when it jumps to 20K RPM). A battery will be required for power, however if a lighting coil exists, the battery is only used for initial starting, then the 12V lighting system may take over to supplement. Seeing about .5 amps at cruising RPM and under 1.5A at 10,000 RPM. The typical 12V batteries used in electric start snowmobiles would work fine and easily stay charged by the alternator.
The 1 to 2 cylinder applications could be limitless, with points and a battery being the requirements. Initial testing will be performed on a CASE garden tractor (Kohler 10hp) riding mower and a 1973 RT3 Yamaha 360 Enduro.
A single cyl snowmobile engine is also planned.
7/14/19 Update: Installed the CDI points converter prototype module on a 1987 CASE 220 Garden Tractor, powered by a 10hp Kohler K-series engine. Main reason it is used for testing (besides no snow) is opportunity for getting some valuable run-time to validate the design in the warm weather.
Jumper cables were used with a 12V battery power for initial testing. This tractor has not been run in 10+ years or more, wanted to be sure it even could run before doing the install. Once she fired up, a small tractor battery was purchased and installed and final connections were made prior to riding.
Installation is very straight-forward. Isolate the condenser and coil contact from the points wire. Connect points wire to TRIG wire on module. Connect switched 12V power from original 12V coil to use as module 12V power. Ground module NEG- to chassis ground (same as battery NEG). Mount CDI ignition coil to chassis & connect coil wire to module & spark-plug. Fired right up and ran with absolutely no issues.
7/15/2019 Update: Ran it for about 2 hours cutting grass and riding around taking data. Idled lower and smoother than it ever did. Note: This application is limited to 3600 RPM max, but is actually fine for initial testing during the summer months. Being a 4-stroke engine, the points only trigger every 2 revolutions. 3600 RPM on the 4-stroke engine is equivalent to a 2-stroke high-idle at 1800 RPM. Although this is possible to use the 4-stroke for testing, it’s relatively easy on the module.
The next install will be on something capable of running at a much higher RPM for testing. I’m thinking 1970’s chainsaw test-fixture!
More to come!
7/20/2019 Update: Today is in the mid-90’s and the shop is like a hot-box, so doing more inside Lab / Bench work. I took the opportunity to try out some of the other features I had yet to mention that are integrated into the module.
The module trigger input can work with points OR most pick-up / trigger coils used on CDI type ignitions. I did some testing today on a K340-2AS Kohler FAN engine used in the Trail-Twisters and numerous other models that ran the Prestolite CDI. The trigger fired the Module exactly as it would the original CDI. This did not use the stator. I designed the module input to accept the trigger inputs from most snowmobile / motorcycle CDI models that I currently offer the FIREPLUG CDI’s.
Because the High-Voltage is generated inside the module, the high-voltage coil on the stator is no longer needed (only the 12V lighting for battery charging is needed). Another advantage is the module provides consistent high-voltage over the total RPM operating range (1 RPM to 20,000 RPM).
To highlight that advantage, here’s an example. I recently re-investigated the Ski-Doo RV ignition system. During my testing, I monitored the stator HV (single) source coil for output voltage to the CDI. The highest output measured was just off high idle, and generated around 320V. As RPM increased, the voltage dropped to under 200V at 8000 RPM. It tends to follow a “BELL” curve. Anybody familiar with the RV’s back in the day will recall a Super-MOD ignition kit was offered for this very reason. It had 2 source coils (LOW & HIGH speed), which is better at distributing a more consistent voltage over a wider RPM range. The voltage output resembled more of an “M” curve over the RPM range.
High RPM generates high cylinder pressures. It becomes increasingly difficult to spark the plug as cylinder pressure increases, due to more energy required to jump the gap. Weak spark energy requires leaner-mixtures, smaller plug gaps, reduce octane or lower compression to keep firing the plugs at higher RPM when the spark energy is weak. The result is reduced HP. A 2-coil (high/low speed) stator ignition provides more consistent voltage when you need power over a wider RPM operating range, however it too is limited by physics, so will not provide a flat high-voltage delivery at all RPM’s. This module will.
Maintaining high energy over the total RPM range will result in better starting, good mid-range and even stronger high rpm running when compared to a stator that is designed to output a peak voltage at a specific RPM.
Should be cooler tomorrow, so may get the chainsaw running to do some high-RPM testing.
PS: Another feature that I have not yet mentioned is an adjustable Timing curve. This means an old points/condenser engine can be upgraded to a high-energy CDI type ignition, plus an adjustable timing curve that can be tweaked to match the application.
More to come!
72 KAWASAKI EXT 650 3-CYL FIREPLUG CDI:
We had recent success developing a FIREPLUG CDI replacement for a 72 Arctic-Cat EXT 650 3-cyl. This is the Kawasaki triple cylinder engine. The other good news is, I think some of the things learned will translate to the early Polaris Starfire and Brut 3-cyl CDI workings in the process. We had offered that CDI in the past, but lost the build notes, so had to stop building it. I think we can offer it again based on our findings during the Kawasaki CDI development. Will have validation know once somebody needs one for the early Polaris or Brute.
POLARFIRE CDI REPLACEMENT UPDATE:
Having access to the 77RV was the key to solving the “non-throttle up” issue. We had success with a prototype concept CDI sent to Canada. This was actually one of the RV’s that would not run with the Fireplug CDI. The new revisions worked great! I believe we now have a PolarFIREPLUG CDI replacement that will work to 1978.
We finally have a 1977 RV dropped off here! Some fine gents in Michigan stepped up to help solve this problem. We’ve been dealing with this since 2003 on random 1977 RV’s not throttling up with the FIREPLUG CDI. Unfortunately, the 77 dropped off worked perfect with the POLARFIREPLUG CDI, but that’s how it’s always been…6 out of 10 work fine. The good news is we are able to run the sled with various CDI configurations to see what works and what doesn’t. So far, we are on the path to finding a solution. Again, thanks to some great local Vintage sled owners stepping up!!
WINTER 2018 / 2019:
12/31/2018: 1972 Polaris ATX 335 twin-cyl snowmobile.
We released a FIREPLUG CDI for the 1972 Polaris ATX 335 twin-cyl snowmobile. The design was initially tested in 2011, but never put into production due to the rarity of the sled. In 2018, we had 3 requests for this CDI, so decided to finally add it to the product line.
12/26/18: RUPP UPDATE:
We are diligently working on a FIREPLUG CDI for the RUPP sleds (late 70’s). Updates on progress will be posted.
12/19/2018: 80~84 Yamaha models (8N4-20).
New FIREPLUG CDI replacement for the 80~84 Yamaha models listed below.
1983 SRV (SR540G)
1984 ENTICER 300 (ET300H)
1984 ENTICER 340 (ET340H)
1984 EXCEL III (EC340H)
1984 PHAZER (PZ480H)
1984 PHAZER SE (ELEC START) (PZ480SEH)
1984 SRV (SR540H)
1984 SS440 (SS440H)
The e-mails & phones ringing for snowmobile CDI’s! Tis the season of grass-drags & winter preparation for the sleds!
We completed a FIREPLUG CDI for the Yamaha MX175 A-B (1974/75) MX motorcycles early this fall. We had no intention of doing it initially, but the pieces fell into place very quickly with excellent results! This adds to our expanding list of Vintage Motorcycle FIREPLUG CDI’s now available. We will continue to look into other motorcycle CDI’s from 70/early 80’s as the requests & support come in.
We had no opportunities to add any snowmobile CDI models to the FIREPLUG line this off-season. All the arrangements we had for sled access fell through. This has become a tedious task when attempting to do development for snowmobiles the past few years. Listed above are the models we are still getting CDI request for. Any information leading to us obtaining these models (borrow, rent or purchase) is appreciated…thanks.
We just completed a summer FIREPLUG CDI development for a couple of Enduro / MX motorcycle models:
Kawasaki 1971~1975 F5, F7 & F9: (F7-175cc / F5-F9-350cc Bighorn). FIREPLUG CDI replaces OEM Kokusan / Kawasaki 21119-007 / CU1124 superseded by 21119-013.
Yamaha DT360A, DT400C, MX400B, IT400C & YZ400C from 1974~1976. FIREPLUG CDI REPLACES MITSUBISHI F8T00172 / OEM#: 445-85540-22: This CDI is close to production, but need a little more time to validate before marketing it. Available in November 2017. Please watch the website for updates.
We are expanding our FIREPLUG CDI line up to include some vintage MX motorcycles. We only started offering these at the end of 2016, and they have started to become popular already. We are finding the vintage MX bikes have a lot in common with the snowmobiles from the same era. So it’s quite possible we will be adding more Vintage motorcycle CDI to the FIREPLUG line-up in the future. Thanks to this expansion, we are now selling FIREPLUG CDI’s into warm-weather states where we have never sold a FIREPLUG CDI before. States like Texas, California & Arizona now have FIREPLUG CDI’s on their MX bikes. Here’s the latest FIREPLUG CDI models for motorcycles:
YAMAHA MX: YAMAHA 1973~75 MX 250/360, 1974~76 YZ125, 1974~75 YZ250 Motorcycles. OEM#: TIA01-02-3XX. Replaces Yamaha OEM CDI ignition module 364-85540-13-00, as well as previous -11-00 & -12-00 versions.
We also have a 1978 YZ250 available for CDI development. This should add a couple of additional models. Watch for it summer 2019
SUZUKI PE ENDURO: PE 175 / 250 / 400 (1977~84)
If you are interested in the PE175/250/400 CDI, please contact us.
SUZUKI CDI OEM#: 32900-41420 / 40420 / 40520 & possibly others
YAMAHA: Our Yamaha Enticer / BRAVO FIREPLUG CDI replacement has also become popular. Still lot’s of nice sleds around with no spark. As typical with Yamaha’s, the stator and components under the flywheel are pretty rugged. It’s the CDI’s that fail. An we are here to help!
JOHN-DEERE / KAWASAKI: We are arranging for a John-Deere 1980 Liquifier for this summers R&D for a replacement CDI. Lot’s of interest in this CDI, so we are going to make it happen. This same CDI was used on the JD’s & Kawasaki Invaders from 1978~1982, so hoping to cover some popular models with the FIREPLUG CDI for next season. We will post more info as we make progress with the development.
We are hearing rumors that one of the other CDI rebuilders & stator rewinding facilities in the southern states has got out of vintage snowmobile CDI products to concentrate more on their Marine applications. I’m not familiar with their vintage snowmobile CDI offerings, however we are looking into the possibility of picking up the models they did offer.