Denso Alternator, how to fit mechanically

[Larry Zimmer]

A general comment regarding the stock system: keep ALL the connections in the charging circuit TOTALLY FREE of corrosion. (Applies to any system.) True, it won't run 14 volts at idle. But, then, your CBX won't run very long at idle anyhow!! (You'll be rebuilding more than the alternator.)

[512tr]

alternator coubling.jpg

This is the alternator coupling plates I put in, how much slippage there is at hard acceleration/deceleration is unknown, if any at all…. but I think it is much better than the OEM steel to steel coupling.

Some have expressed concern about particles in the oil from the wear of the fiber plate, on the other hand there will be steel particles in the oil from the OEM steel-to-steel wear witch I think is much worse, in addition there is fiber particles in the oil from the wet clutch wear… so I don’t worry that much…. But to be on the safe side I change oil/filter quite frequently.

The flywheel effect and the spinning torque that the OME alternator creates is a point, but I think few of us are able to feel the difference with the low mass alternator as the Denso.

Larry, the charging at idle was only to state that the charging is working well … Idling the CBX in general; the high heat generating air-cooled, carb’d, 6 cyl. engine, idle should be minimized to start up and short necessary stop in traffic, otherwise keep it moving.

My point is that the CBX OEM alternator is not “low output” for its purpose, if serviced properly and no critic to the Denso conversion

[Larry Zimmer]

Nice work on the clutch plates. Let us know, downstream, how it goes. With a good lap job on the iron plate and some reasonably hard friction material, I would think very little contamination to get into the oil.

[512tr]

Larry, will do....I believe and hope there will be no extraordinarily to report when I do more km on my CBX.

[Syscrush]

What is wrong with the OEM alternator except for the gear/clutch drive, which could easily be improved?

I took advice on this forum to upgrade the alternator to keep up with my electric heated vest and gloves.

I am also in the (lengthy and stalled) process of converting my bike to EFI, and the high pressure pump and 6 injectors put significant load on the charging system.

[CBX-tras]

Keep in mind that monitoring and calibration of engine temperature is critical with EFI on an air cooler motor.

The main reason most EFI motors are liquid cooled to keep the temp constant.