confused on why my bike cuts out in the rain

[barnesy213]

hello people, well as the topic suggest's i have a problem with my bike cutting out ,, its a honda cbr 125r 2009 version (fuel injection)

quite recently it has been cutting out in the rain (not that i ride much in the rain) but its quite a pain as it won't start for ages after its cut out

its had a new spark plug and spark plug cap , and still to no a-vale , it also has a non standard danmoto exhuast on it

if any one has any suggestions as to why this could be happening please post below thanks guys and gals

[c_dug]

There's probably water getting somewhere that shouldn't get wet.
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[barnesy213]

yeah thats what i'm thinking but dont know where lol i was thinking of changing the exhaust gasket but carnt really see that being the cause of it

[andyscooter]

what sort of air filter is on it

i had a bike do that with a pod filter as the water went into the carb
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gilera runner vxr200 (chavped)
if its spelt wrong its my fat fingers and daft auto correct on my tablet

[c_dug]

I really very much doubt it is the exhaust gasket. You would need to get a serious amount of water in the exhaust to make it cut out.

More detail needed really. How does it cut out, dead stop, misfire for a while first? Does it do it while you're moving or stopped? How soon can you get it started again (ages isn't very specific)?
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[barnesy213]

is the standard airfilter that comes on the bike

[barnesy213]

basically you will be going along and it will start popping and banging ,and then the engine will die , the bike will turn over but wont start for like 20 mins, (this was on the way to where i work ) parked it in the carpark and after a 10hr shift went back to the bike and started as if nothing had happend

[c_dug]

I think you were probably along the right lines with the new sparkplug cap (though I wouldn't have jumped on it as a first reaction). I'd suggest a liberal coating of WD40 around the general area for starters.

I presume the new cap came with the rubber seal that prevents too much water getting to the area? Is it in good condition?

Also I presume your front mud guard is present and unbroken?
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[map]

Popping and banging is reminiscent of reg/rec failing on my old CG.
So coupled with added water maybe that's an area to investigate?

Also I'm reminded of the thread about cbr500 flasher failing due to water damage (here). Maybe new Hondas aren't as waterproof as old ones?
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...and the whirlwind is in the thorn trees, it's hard for thee to kick against the pricks...
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[_Iain_]

I'd soak everything with wires coming out of it with WD40. Everything electrical anywhere, the outside of the wires, literally everything.

My ped starts, but won't rev past idle if jetwashed & will idle perfectly. Soak the crappy chinese wiring with WD40 and everything magicly works again. They need to start including a small can as part of the toolkit
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Please be aware that the above post may be full of complete nonsense.
Riding: '07 KTM Duke II, Baotian BT49QT-20 Driving: '88 Volvo 340

[barnesy213]

going to get a local honda garage to look at it as ive not go no experience with electrics so i'd rather pay for someone who knows what they are doing


and yes the cap came with a new rubber boot and its all in good condition and the front mudguard barely has a scratch on it lol so id presure its not broken in any way

and i did try spray everything with wd40 but that was no good as it still did the cutting out issue

[bypass2]

What about the rain getting in to the kill switch or the side stand switch.

[barnesy213]

the bike does not have a kill switch and as for the side stand switch, i dont know if water is getting in there or not , but i suppose its a possibility

[cheeseman]

Sounds almost certainly like a fault with the HT side of the ignition to me. As suggested, you could try drowning the lead, caps and coil in WD40 to see if it helps. You could have a crack in the casing of the coil, or a failed HT lead that is shorting out when damp.

Only way to really sort out a problem like this is replace each component at a time, or to save time, replace everything on the HT side.

You could also try working out which parts are getting most damp when it is raining.

G.

[smegballs]

Most of the electrical connectors, especially ignition circuitry, on my GN has been cleaned up and reassembled with silicon grease since I got it. All I know is that it put up with 4+ hours of torrential (as in, rain cutting down visibility to about 100m) rain and never skipped a beat.

Of course I can't say how the bike would have done if I hadn't siliconified the connectors, but in my eyes it defo helped.

[ZebraDriver]

My sons Honda CLR used to cut out and missfire in the rain. I tried all kinds of stuff to correct the problem. One day when I had the tank off (for another reason) I found that the spray coming off the back of the front wheel was aimed directly at the coil (the coil was covered in dirt and mud). A wee mudflap on the back of the mudguard cured the problem.

[Mark65]

Hi
Without intending any insults, has your plug cap got both rubber pieces on it and are the good and tight?, I had this when I got my CG and it spluttered and died in heavy rain, put a new NGK plug cap on and its been fine ever since, I think they will degrade over time and use. It cost about £3.

Mark
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07 Yamaha YBR125, 07 Honda CG125 , 15 CBR300R (Chocolate Crank, Deaded), 16 CB500FA, 19 Honda Forza 300, 70 Suzuki SV650

[talkToTheHat]

I used to have a similar problem on my yamaha whereby the 12v side of my ignition coils and the connecting wires would get soaked in the rain and stop working. Locate and spray with wd40. Look for any exposed connectors, spray with wd40, see if this helps. once you have found the parts of the system that are vulnerable, protect with "damp start" or appropritate grease, or replace connectors with waterproof connnectors.

I found the ugly but practical addition of a pyrimad plastics fenda extenda works really well. Apparently this also helps with the front plug on an sv650. might work for you, but find the problem first.

Try not to kill yourself by experimenting in heavy traffic. Losing a cylinder on a twin in heavy traffic on a dual carriageway with no hard shoulder is scary enough, losing a cylinder on a single is probably worse.
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Bandit. does. everything.

[c_dug]

On a related note to this, I have seen two CBF's at the side of the road in heavy rain in the last month or so. Both on the A13 so possibly the same person both times.

Still, IMO there's more nails than wood in the CBF's coffin these days!
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I am a bellend, I am a man of constant sorrow, I am a gummy bear, I am a rock.

[barnesy213]

yes all the boots on that spark plug cover are the same on mine , its the same brand infact and no offence taken, i know how easy it would be to perhaps put a little tear in it

[WULFSTAN]

barnesy213 everyone is saying spray all wires with wd40 have you done this?
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[barnesy213]

[quote="WULFSTAN"]barnesy213 everyone is saying spray all wires with wd40 have you done this?[/quote]

yes i have done this and still the bike cuts out