Cracked Tail - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 9 (permalink) Old 06-26-2019, 05:39 AM Thread Starter
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Cracked Tail

Hi guys,

I am on my third tail. The crack starts around the Frankenstein bolts, I get it plastic welded and then in cracks again in six months or so . Eventually I have to buy a new one as you can repair it once or twice.

I realize carrying a pillion exacerbates the problem but even so...

I was wondering if anyone has had the same problem and have engineered a solution.

Thanks guys.

G
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post #2 of 9 (permalink) Old 06-26-2019, 10:39 AM
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Get a lighter GF???
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post #3 of 9 (permalink) Old 06-27-2019, 03:10 PM
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What have you been using to repair it? RC51 OEM plastics are I believe a composite of ABS material so they can be mended with ABS glue (not PVC) and either pieces that will serve as inner patches or ground ABS material used in a similar fashion to fiberglass cloth and resin. Dealing with the outer surface cracks is a tad more tricky to make look nearly invisible but it is doable, especially with Honda's 3 process paints. I know lots of owners that make similar repairs to Goldwing bodywork and it holds up really well.

Duct tape can't fix stupid...but it sure helps muffle the sound
'03 SP2, '09 GL1800
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post #4 of 9 (permalink) Old 07-04-2019, 04:08 AM Thread Starter
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Thanks mate,

I get it plastic welded by a professional. Unfortunately, in time it cracks around where the Frankenstein bolts push up against the plastic bushers (washer) onto the tail.

I asked if they could put fibreglass on the inside of the tail to strengthen it but the guys reckons the two opposing products won't bond.


I really thought everyone who has a SP2 would have a tail cracking probs put apparently not.

Thanks again guys.
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post #5 of 9 (permalink) Old 07-07-2019, 10:29 AM
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Garage
they always crack, i feel like theres too hard of a bend at the bolt from the tank flaring it out. maybe epoxy a layer of abs plastic in that region to make it not flex as ez? i dunno.
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post #6 of 9 (permalink) Old 07-08-2019, 03:39 AM Thread Starter
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Yea, all good now.

I have it repaired and I've shaved the plastic bush/washer down a few thou.

If that doesn't work, a cheap Chinese tail for me..
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post #7 of 9 (permalink) Old 07-08-2019, 09:17 AM
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Maybe enlarge the bolt holes a little to allow it to move slightly and also take tension off of them.
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post #8 of 9 (permalink) Old 07-08-2019, 09:42 AM
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Something us old dogs used to do on hard mounted parts (pegs, fairing mounts etc) to help quell vibration was using cuts of inner tube or wet suits between the hard (metal or composite) parts and it did work. Obviously some of the fasteners may not have the threaded length to put too much material between them, but might be worth a try.
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Duct tape can't fix stupid...but it sure helps muffle the sound
'03 SP2, '09 GL1800
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post #9 of 9 (permalink) Old 07-08-2019, 08:16 PM
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A guy my local Honda shop uses back filled the mounting points with some kind of epoxy putty, used a dremel to form it so it would be flush (all inside the tail section) it hasnít cracked after a year.
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