Fuse replacement for 1972 Wombat 125

[Brian4236]

I hope everyone had an enjoyable 4th.
I need to replace the fuse for my 1972 Wombat 125.
According to the schematic, the fuse is part #949420 (this is the fuse that fits in the clear plastic fuse box assembly, part #949419).
The fuse is identified as #949420. Strictly Hodaka sells a fuse ID'd as #949420(20A). Does that "20A" mean 20 amps? The reason I ask is because the fuse that burned out on my bike is "KSG 5A." Is that the correct fuse?
Thanks for your help.
--Brian

[thrownchain]

Yes, 20a stands for 20 amp. 5a is a 5 amp. If the parts book lists 20a, that's what should be in there.

[Brian4236]

Any reason why someone would use a 5A? This was a bike that was restored. It looks to be the original fuse to me (there was another one just like it in the fuse box assembly).

[BrianZ]

If you check the schematic it states 15A for model 94 and 20A for model 94A.

Brian

[viclioce]

Maybe someone added an Ace fuse to it? My B+ had a 5 amp fuse. Or was that one wrong too? ; D Victor

[taber hodaka]

Many headlights have been burnt out with too many amps a smaller fuse would or could save a headlight. If the headlights taillight and horn will work with a 5 amp fuse good deal if it burns out the fuses then put in a bigger fuse??---------Clarence

[Bill2001]

The current draw or amperage of any circuit or circuit component is determined by the resistance (and/or voltage). With an un-regulated alternator on the Hodie, the voltage rises with RPM, importantly so does the wattage (volts x amps) and that power increase burns bulbs out.

Just to nit-pick...

[viclioce]

Most Hodakas put out total 45 watts from the magneto at 8 volts. W=VA. W/V=A.

45 / 8 = 5.625

So even if everything on the bike is drawing simultaneously, you should not need much more than a basic 5A fuse. 20 is way too much. It would be almost like having no fuse at all.

The headlight itself is rated at 35 W for either high or low beam. 35 / 8 = 4.375. Hence, 5 amps headlight fuse.

Simple stuff. Don't know what the schematic reference number is for, but it isn't amperage.

; D Victor

[Brian4236]

Thanks, Victor. Makes sense. As I said, the fuses in the plastic holder look to be original, or at least old.

[viclioce]

You can get the old style glass buss fuse holder or do like I did & replace it with a mini blade holder. I figured carrying spare mini blades was safer than carrying glass fuses. The mini blades won't break easily. ; D Victor