Everything ok, I recommend for CB500 - fits perfectly. The heat sink provides adequate cooling, the factory one did not have it and there was a problem.
About a year ago I installed a colleague in a Honda CB500 - probably 1998.To this day he does not complain. Recently another colleague had a charging problem (also CB500, 1999) and asked for advice (the previous regulator - "more branded", read much more expensive - seemed to overcharge the battery [colleague's opinion, I did not check]. It turned out that everything was OK, the one evaluated remained stock).
In both cases, the spacing of the mounting holes did not fit very well, but it's 0.6 mm max - just "lick" the housing with a suitable conifer.
There could be a little more charging voltage (original :14.5 V, evaluated : 14.17 and 14, 22 V - two copies).
If someone "embraces currents" and would like to check the reg. "dry", just like the "classic" ones. - regulated power supply, bulb voltmeter - then you may be strongly surprised. But after installation in the motorcycle everything OK. Probably some "more advanced" technology (perhaps - it's a little undervoltage is also not always so ?) Considering the price / quality ratio - I recommend. In general - in Hondas (at least of these vintages) you need to take care of the charging installation. Most often the problems begin at the connectors of the 3 yellow cables from the alternator. Corrosion, oxidation, increase in resistance, overheating, the rectifier-regulator begins to overheat, the internal electronics fall apart, no longer regulate the voltage and we have a "bubble" from the battery. It is worth checking these areas carefully.
With Hondas (CB500, Transalp) I have done a little more than 80 kkm, and also a little at colleagues' repair.
My motorcycle is a 2000 Honda nsr 125r. The product I ordered from Gmoto turned out to be better than the original in terms of fit to the motorcycle. The price is also 4 times lower, and the quality is the same. Despite being shorter, the installation went without a problem. I highly recommend Gmoto website :)
Honda CB 500 S, 1999.
Before replacement charging only above 3000 rpm at slow 12.3 volts without load, after replacement 14.3 volts after load 14.1-14 volts (you would have to check the battery and the pradnic-alternator itself before you proceed with the replacement)
In summary - good purchase quality / price
I recommend
After ordering the product, I did not expect to get it earlier than it was described, I got the product 1 earlier than the scheduled delivery, the product well protected in the shipment, it works flawlessly :)