Fitting Hondaline Rotor Covers to a GL1800 - Steve Saunders Goldwing Forums
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post #1 of 1 (permalink) Old 08-19-2008, 04:57 PM Thread Starter
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[align=center]I've copied this (slightly edited) from part3 ofthe Bikers Workshop part of the site. You can download this actual forum page in pdf format by right-clicking the .pdf icon here and "save target (or link) as" to a location on your computer;

Having gone to the expense of buying Hondaline rotor (brake disc) covers for your GL1800 Goldwing, you will no doubt have noticed that they are made of steel. Plastic aftermarket covers are available and the fitting procedure is similar.
The only real downside to the Honda rotor covers is that the unpolished inner surfaces will be more prone to damage from stone chips etc. and will eventually rust. Cleaning them is impossible without removal. My own way of overcoming this is described below.
Note that this article covers the pre-2006 models.

If I am asked to fit Hondaline metal rotor covers to a GL1800, I usually encourage the owner of the Goldwing to have the inner surfaces paintedso as to give much needed protection against the dreaded tinworm. In the picture here, I've started to mask all the holes from the outside to keep the primer and paint off the chrome. Note that the mounting hole at top right is for the long 8mm head bolt when fitting later on.


This is the etch primer coat after spraying. Etch primer is used on bare steel or unpolished chrome as it gets a better grip on the surface and will not fall off like standard primer. I sprayed one coat of etch and followed it with a coat of grey primer.


The colour of the final coat isn't important, but this owner asked me to spray them blue, as his GL1800 is Illusion Blue. I just used a standard solid blue colour as it's very difficult to see the inner surfaces when the covers are on the bike.


After the paint is dry, use some 2k or cellulose thinners to clean off any paint that is on the chromed side. Taking your time will ensure that the paint and chrome lines meet precisely at the edges without overlapping. You should do this after the paint dries but before it gets too hard, otherwise it won't come off too easily. If you used 2k for the final coats, then 24 hours after spraying will be fine.


Taking off the front section of the mudguard is easy, just use a 6mm Allen key to remove the four bolts. Note that the bolts with the rubber washers are fitted to the bottom mounting holes in each side.


The rear covers come off by removing the two Allen bolts (these are shorter than the bolts in the front mudguard section), you can see the two holes at the rear where the cover meets the rear section of the mudguard. The new rotor covers are a straight bolt on job (no need for pictures of that) and you only need to note that the two long 8mm head bolts supplied should be fitted to the mounting hole as I described in the very first picture above. On non-ABS models, there is a smaller bolt fitted to the right mounting hole instead. As usual, I apply a dab of copper grease to the bolts.


Job done. Actual fitting time is only about ten minutes. If you don't have access to spraying equipment, why not ask your local spray painter to do it for you? It shouldn't cost very much. Alternatively, you can just get a tin of Hammerite and brush it on, the finish won't be as good but as it will be hard to see then who cares? The method I described in this article is one I used on my 2001 GL1800 and the bikes new owner assures me that the rotor covers on that one are still perfect. I've since used it on my 2003 GL1800.

Steve Saunders,
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