Can I hack this piece from my rad??
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  • 1 Post By Twowheeltone

Thread: Can I hack this piece from my rad??

  1. #1

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    Can I hack this piece from my rad??

    Hi All!

    Just put a new (after-market) rad on me bird (2001), which has vastly improved the cooling cycle.

    Noticed yesterday that I had coolant leaking from the pipe that connects the rad to the reserve tank (I think this is the vacuum pipe). This has been caused by the metal tube from the rad sticking further outwards than the original, which is now rubbing on the inside of the fairing. Anyway, the rubber pipe is old and now split, which I'll be replacing.

    I reckon that I could simply hack about 1 inch from the tube and that should solve the problem. HOWEVER, this would mean losing the 'burred over' end which may lead to an insecure fit; is this pipe under pressure? Doesn't seem to be, but not sure.

    PS. Does anyone happen to know the internal diameter of this pipe, so I can get it ordered today?

    As always, thanks in advance.

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  3. #2

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    Re: Can I hack this piece from my rad??

    If this is a Chinese after market one ?, If it's the screw in overflow pipe I had the same problem with mine when I fitted it a couple of months ago. I trimmed the thread end down to screw it further in as it was a very close fit against the pressure cap, i also trimmed about 2cm off the pipe as the connector was a bit larger than the original not had any problems since.

  4. #3
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    Re: Can I hack this piece from my rad??

    It's not usually under (much) pressure as it just carries coolant to and from the rad as the coolant expands and contracts. I wouldn't expect it to see more than a couple psi or a mild vacuum. That said, if the rad cap failed or your engine overheated to the point that the coolant was boiling you could end up with as much as >20psi in it as the steam pushes coolant out. Would there be enough room for double clamps if you cut it down?
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  6. #4

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    Re: Can I hack this piece from my rad??

    Thanks Shewie. Managed to cut it down, and left enough to screw down a jubilee clip over the remains. Can't do any more at present as still waiting for the new pipe. Looks like an interesting job getting to the remote tank to re-attach!!

  7. #5

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    Re: Can I hack this piece from my rad??

    So where did you get this exact fit radiator from so others can be warned. and pics please as well. I am thinking Sandsqudxx had to have the neck cut off one he bouth that was a direct fit and re-welded to get it too fit. Heads up on some of these would be a good idea to keep fellow bird owners from getting into something they can't engineer around.
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  8. #6

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    Re: Can I hack this piece from my rad??

    Bought the rad from a well-known internet auction site for £56 GBP. At that price I wasn't expecting German craftsmanship, but all I had to do was hack 15mm off one of the connecting pipes, and the job was a good-un! I shudder to think what an official Honda part would cost.....

  9. #7

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    Re: Can I hack this piece from my rad??

    £56 for a rad !!!

    Bargain.

    I've fitted two so far on mine and paid £60 inclusive of postage from China shortly afterwards I bought another four for the same price then the price went up

    They are cheap and still fairly cheap and you get what you pay for in design rather than build quality.

    One i fitted had a bracket that was the wrong side of the pin at the top but i got around that easily

    The other radiator I found no fault with, they cool very well and i generally stay at around 80- 85 degrees however I ride, but just like the £500 Honda rad it goes up in traffic. and doesn't pop.


    There is no pressure in this overflow pipe.

    It just a continuation of the vent pipe that goes into the reservior. when cooling it simply sucks coolant back into the radiator where again its under no pressure.

    As long as the pipe stays on reasonably tight you should be fine as the only worry is you might draw air in when cooling rather than coolant from the expansion tank/ reservior if it is loose.
    Last edited by Twowheeltone; 05-16-2015 at 6:35 PM.
    Mayfield07 likes this.


 

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