MS as CDI replacement on Honda Twin Cyl Motorcycles
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Read the manual to see if your question is answered there before posting. Many users will not reply if the answer is already available in the manual.
If your question is about troubleshooting, configuration, or tuning, you MUST include your processor type (MS-I or MS-II) and code version in your post. If your question is about PCB assembly or modifications, you must also include the main board version number (1.01, 2.2 or 3.0).
If you have questions about MS1/Extra or MS2/Extra code configuration or tuning, please post them at www.msextra.com Such questions posted here will be moved to: a temporary MSextra sub-forum, where they will be removed after 7 days
The full forum rules are here: Forum Rules, be sure to read them all regularly.
MS as CDI replacement on Honda Twin Cyl Motorcycles
I have a 1982 Honda CM450 motorcycle with an un-programmable and likely failing CDI ignition system. I would love to be able to control the spark on my bike with a MS. From what I have read it seems possible but I am not exactly sure of all the details. The engine is a 2 cylinder with 1 shared ignition coil. I've already replaced the factory coil with a GM DIS (AC Delco D555) and this coil is working with the factory CDI. My plan is to use a MAP sensor for load sensing but I am not sure if the VR sensor in my stator is compatible with the MS. All of the setups I have seen on the main MS site use multi-tooth trigger wheels. I have the complete opposite setup. There is a magnet on the flywheel which passes by a pickup coil on the stator so I would get only 1 pulse every revolution of the crank. Does anyone know if this would work? Anyone know of any other spark-only applications of the MS on carbeurated motorcycles? Any input would be greatly appreciated.
Re: MS as CDI replacement on Honda Twin Cyl Motorcycles
One magnet would give the same sort of tach as points driven off the flywheel, as regards pulses per revolution. So it would certainly work. The snag with only one pulse per revolution is that any change in the timing due to the ignition mapping is going to happen more slowly than with a multi tooth wheel.
Dave P, London UK.
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Rover V-8
MSII V3
EDIS
Tech Edge Wideband
Re: MS as CDI replacement on Honda Twin Cyl Motorcycles
Well it certainly wouldn't be slower than it already is ;) Seem like a MS2 w/ v3 board is what I need since it has a direct coil drive and the bike already runs as wasted spark. The only issue is that it seems silly to pay for kits that include all the injector circuits when I only need spark. I wish there was a MS option in the price range as the MegaJolt.