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post #1 of 40 (permalink) Old 05-31-2013, 08:21 AM Thread Starter
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Big Boom!

hi lads, was out on another blast today down to my usual location and on the way back when stopping briefly i noticed a tiny bit of steam and a little coolant that had escaped and was spitting, going up the frame and onto my armour. then 5 miles away from home i was going through a small village and there was n almighty boom from the left side of my bike and i was almost covered in pink coolant. had to quickly flip the visor up with a now steaming left hand, regained control and pulled over quickly to shut off the engine.

weirdly enough i this broke down in earshot of a professional dirt biker who helped me take off the side fairing and take a look and helped me get the bike home in the back of hit kitted out van! amazing luck!

anyway, it looks like the big fat hose that comes out the back of the left rad and goes into the engine (it may pass through to the other rad, im not sure yet) had an almighty tear in it.

help and thoughts would be appreciated. im thinking its a back pressure thing, cos the temp was down at 82degrees when it happend.

Honda SP1.5 owner
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post #2 of 40 (permalink) Old 05-31-2013, 08:48 AM
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How does the hose feel? Is it really soft, or hard? Ever had a blown head gasket? Oil contamination in rubber hoses will make them deteriorate, and sometimes they just get old and need replacing.
Oh and WTF are you running pink coolant!!!

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post #3 of 40 (permalink) Old 05-31-2013, 09:49 AM
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Get a samco hose kit and some engine ice

It's old.
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post #4 of 40 (permalink) Old 05-31-2013, 09:58 AM Thread Starter
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lol, its more of an orangy pinkish colour. ive checked the hose and it feels easy to squish between my thumb and index, theres a long tear in it, almost a perfect slice where its split open. and i can verify its the L hose that goes from the back of the rad and links to the metal tube that runs over the top of the engine.

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post #5 of 40 (permalink) Old 05-31-2013, 10:02 AM
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I vote Samco hoses too.

John, 2000 RC51 #000100

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post #6 of 40 (permalink) Old 05-31-2013, 10:21 AM Thread Starter
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would love to get a nice set of samcos. but this Polarbear has found out hes gonna be a dad for the first time and the Mrs would frown on well over 100 being spent on my bike. unfortunately it looks like im just gonna have to buy a good condition hose replacement for that specific part.

i was about to undo the jubilees and pull the bar through and out to take a look at it but there are clips inside too. does the tank need to come off to get to them?

just lookin for the easiest way of doin the job

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post #7 of 40 (permalink) Old 05-31-2013, 10:59 AM
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Please replace the pink stuff with

$9 a quart but absolutely worth it.
Idk what kinda coolant yours is but I've seen many cases where the pink/red coolant in automotive engines have caused alot of problems

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post #8 of 40 (permalink) Old 05-31-2013, 11:08 AM Thread Starter
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looks like good stuff, but remember im in the UK. what do you lads think causes the prob? id like to think its an old hose (hopefully thats all it is), but with a bang that big and the slight spitting from the right side earlier on, id like to know what caused it in case it happens again, it really sounds like back pressure

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post #9 of 40 (permalink) Old 05-31-2013, 11:24 AM
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Those hoses are probably 10 years old. 2 years ago i replaced all of mine. Most had cracks. They are just old hoses.

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post #10 of 40 (permalink) Old 05-31-2013, 11:38 AM Thread Starter
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ok man, thats good enough for me, thats a few of you guys said the same thing. i suppose i'd better go for the full kit cos my hoses are prob all the same age. is it a big job to replace all the hoses in one go?

ill be doing it with my bro, once i have the kit, we've both recently invested in tools and equipment. we aint as mech minded as some of you guys but we're both prepared to get our hands dirty.

Honda SP1.5 owner

Last edited by Polarbear; 05-31-2013 at 11:44 AM.
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