roeme
CB750 New member
Hiya all,
first of all, sorry for asking a question related to a CB650, not 750 - but as far as I understand, it's the same ignition, so I hope it's okay for this one.
So, I'm currently restoring that bike, and I've encountered the "runny potty" problem of the igniters. While there are replacements available, either they're priced completely bonkers, or it's used ones where there's no guarantee for them not having the same problem.
So I thought, "eh, CDI / transistorized ignitions must be a bog-standard thing by now", and sure enough, by searching for "6 pin DC CDI" you'll find dozens. They all seem if not the same, then just slight variations of a standard one. And judging by how they should be connected to the engine & rest of the ignition, and the MPS-200's schematic, those run-of-the-mill CDI's should be a drop-in replacement (well, needs some connector crimping) for the OKI one.
The only things I'm wondering at this point is firstly wether these units can handle the rpm's, since most of them are marketed towards the ATV/scooter crowd and often have something along the lines of "150-250 cc" in their title (It's my understanding however that an ignition doesn't care too much about your CC's). Secondly, I'm not sure what the stock primary voltage is...I suppose there's a bit of leeway, but I reckon if voltage of the new CDI is too low, I'll get a weak spark, too high, I might run the risk of frying the coils.
Anyway, by any chance anyone of you already did something along these lines?
first of all, sorry for asking a question related to a CB650, not 750 - but as far as I understand, it's the same ignition, so I hope it's okay for this one.
So, I'm currently restoring that bike, and I've encountered the "runny potty" problem of the igniters. While there are replacements available, either they're priced completely bonkers, or it's used ones where there's no guarantee for them not having the same problem.
So I thought, "eh, CDI / transistorized ignitions must be a bog-standard thing by now", and sure enough, by searching for "6 pin DC CDI" you'll find dozens. They all seem if not the same, then just slight variations of a standard one. And judging by how they should be connected to the engine & rest of the ignition, and the MPS-200's schematic, those run-of-the-mill CDI's should be a drop-in replacement (well, needs some connector crimping) for the OKI one.
The only things I'm wondering at this point is firstly wether these units can handle the rpm's, since most of them are marketed towards the ATV/scooter crowd and often have something along the lines of "150-250 cc" in their title (It's my understanding however that an ignition doesn't care too much about your CC's). Secondly, I'm not sure what the stock primary voltage is...I suppose there's a bit of leeway, but I reckon if voltage of the new CDI is too low, I'll get a weak spark, too high, I might run the risk of frying the coils.
Anyway, by any chance anyone of you already did something along these lines?
