Honda H100 help....

Vintage Honda · L Plate Warrior Joined: 18 Oct 2006 Karma :

Firstly hello all,
i'm new in the bike world and just bought a honda h100a 1980 model the bike is in astonishing condition but theres just one or two little niggles, the meter lamp appears to be very dim you can hardly even see it. They have a resistor which i changed for a new one but no difference even cleaned up the mounting surface but no luck???

finpos · World Chat Champion Joined: 13 Sep 2005 Karma :

What do you mean by the meter lamp?

What's this resistor you changed?

Sorry, both sound very unfamiliar to me Smile

finpos.

DOS · World Chat Champion Joined: 29 Jun 2006 Karma :

It might not be earthed properly,you could run a wire from behind a bolt
on the frame to a bolt in the clocks that will earth it.

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

Hi,

Did you try a new bulb in the meter?
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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

First off. Good choice for your first bike, you'll always remember it because they have character. More fun than a 9bhp commuter bike has any right to be and reliable with it. My advice is never sell it, you'll always regret it if you do.

By meter lamp I assume you are meaning the backlight for the speedo and rev counter. Well, try all the earth/connector/bulb faults described, but you may find it is just down to the fact that the charging system is pish. 6v direct lighting and not a hell of a lot you can do about it.

Replacing the bulb with an LED might improve things a bit, but maybe not because they run on AC and diodes don't like AC. Never tried one myself though.

Vintage Honda · L Plate Warrior Joined: 18 Oct 2006 Karma :

Rite i actually got to spend some quality time on the bike for a change and i think i've solved it, i was refering to the speedo illumination bulb and it was just too dim, rite now the daft bit all the indicators had 12v 5w bulbs when they should have been 6v 21w, the speedo bulb the turn light and neutral light were all 12v. I'm going to get some correct bulbs hopefully in the morning and fingers crossed it should work fine.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

Should do the trick.

Is the battery ok? There is no voltage regulator on the H100, the battery soaks up any slack in the system (told you the charging system was pish).

If the battery is duff, you can get quite a bit over 6v in the loom and it merrily pops bulbs as soon as you fit them. This might be a reason why someone would fit 12v bulbs (or they might just have no idea what they were doing, which is common with owners of such bikes).

Vintage Honda · L Plate Warrior Joined: 18 Oct 2006 Karma :

The battery is brand new, mine is the early h100a with just a speedo, they have a resistor as its referred to in the repair manual it sits just above the cylinder head and mounts to the frame it has one pink wire coming out of it which goes into the loom when the resistor is earthed the bulbs would be dim but if its removed from the frame and just the pink wire connected all the bulbs are bright, i think the issue could be the bulbs but will see.

stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :