Topic: mine 550 dies in rain and fog

[strynboen]

hey ..hov drives yours sohc in wet kondisions..mine starts spluttings. poping.shuting and dies ..and only full choker can hold it alive....after drying aut all works fine...
have bayed aftermarked coils..and new viring and caps and plugs..can the problen be the cheep coils/wiring...or is it a general sohc problem

[Duke McDukiedook]

Could be old HT wires, condensation on the points? Do you have the stock airbox on?

[strynboen]

hey,,, yes all stock..just the coils are no name...dont think it are fuel/kondens/kaburettor problem..it feel  like elektric problems...have set the timing plate and breakers..all ok..

[nayto550]

I had this same problem on my 550.  Turned out to be a bad gaket on the points cover allowing water to get into the ignition points.

[grachman]

I had this same problem on my 550.  Turned out to be a bad gaket on the points cover allowing water to get into the ignition points.

+1  I had the same issue.  Replaced the gasket and all was good.

[CoachDoc]

My 550  used to cut out in the rain on the 1 and 4 (outboard) cylinders. Stopped when I replaced the coil and plug wires.

[TwoTired]

I had this same problem on my 550.  Turned out to be a bad gaket on the points cover allowing water to get into the ignition points.

+1  I had the same issue.  Replaced the gasket and all was good.

+ 2
I made a gasket out of neoprene, as the cork is good for one installation at best, even then, it seems prone to letting the the points get wet.

Cheers,

[Dimitri13]

Is it possible that water is getting in the spark plug boot causing it not to fire?

[LesterPiglet]

I replaced my HT leads a long time ago and haven't had a misfire in the wet since.

[OldSchool_IsCool]

Wet HT wires could also be shorting to the engine block. If changing your points gasket doesn't fix the issue, get a spray bottle of water, find a dark spot, start her up and wet the plug wires. Look for any sparks jumping from the wires to the block.

[strynboen]

thanks for good advice...think i take the tank off...and take a vater sprayer for flovers..and test hvere it make elektric jump,over..

[andy750]

I had a CB750F2 many years ago that had the same issue - would ride great in the dry and then when it got wet would ride terribly till it dried out. Not good when riding from Paris to Alsace with the French g/f on the back. Tried everything - replaced the coils, HT leads, spark plug boots, points cover gasket etc etc...never did find the problem and sold the bike in the UK before coming to Boston.

Let us know how you solve it!

good luck
Andy

[strynboen]

i took the spay test...and the coils gave elektric shok.when you put a finger on them..
try to make the old from my 400 four to work..this old coil have 5 ohm..all the nev for elektronic ignision have less ohm..3,5 -4,5 ohm.
.so i trying the old.....
 cms.nl have not new coils
..think old kawasaki"s coils fit..if  any honda dealer not can get  the right one

so do not bay this type..pic 1

 pic.2    have to fix some 2 komponent plastic to seal it

[thrutheframe]

  Great looking bike stryn.  Glad you sorted it out.

[lucky]

hey ..hov drives yours sohc in wet kondisions..mine starts spluttings. poping.shuting and dies ..and only full choker can hold it alive....after drying aut all works fine...
have bayed aftermarked coils..and new viring and caps and plugs..can the problen be the cheep coils/wiring...or is it a general sohc problem

The problem is water.
Does it have the stock air box?

[strynboen]

yess..... love stock airboxes..some of the best abaut old honda"s
...think that choker thing are just the strange  vay it are...the coils are shot for shure..

[Deltarider]

the coils are shot for shure

With all respect, I'm not convinced. A coil is a very simple thing and doesn't end it's life so easy and certainly not two at the same time. Moreover I don't see how playing the choke can help to keep your motor running as you mention in your initial post when the coils are really bad.
Are you sure the problems occur in fog too?
Or is it mainly on wet roads?
K3 owners should be aware of problems in the wet related to the 4 carb vent tubes. Remedy: cut two inches of these tubes. Not saying this is your problem, but there have been various reports, and they all concerned K3s.

[strynboen]

honda sohc are old..and like us..they have many small problems,,, somtime kombinated  /somtime simpels faliaure..of singel komponents...but this koils are sheise..i got 4 with the bike..one vas no ohm..two vas elektric flash over...small lightings vhen it vas vet..the last i throw aut not testing it...must be a bad serie  from china..

but test go on..vith the 400 four parts in...
do you think gas/vater.fog... can be frozen in the ventilate tubes./intake.in wet kondisions?? vaccum make the kaburettors kold..even in summer kondisions...
but in this test..the vater spray..on the coils..make the death

living vith a old honda...are like be married..somtimes it is sheise..but when all runs..all forgotten,,,

[Deltarider]

living vith a old honda...are like be married..somtimes it is sheise..but when all runs..all forgotten,,,

Keep it up, Strynboen, you Danish people are supposed to be the happiest people in the world (and it's not the first year I read this).

[strynboen]

im very happy..have 4 honda...and some of them even runs!!!!!somtime
..denmark are fine..just that tax on cars and bikes 180%..but that pays hospitals and schools.. and are free for all
.few are mutch ritch   rest are midedel class..ve do not have  poor  low class  in denmark..
so yes danes are happy

[andy750]

I am coming to Roskilde on Monday to see how happy the Danes are.

[strynboen]

roskilde festival is in juli/ august ,,a bit erly.. to arrive.i bayed my cbx 1000 in roskilde..the sity with the tvin tower dom..it vas fun to drive it home over great belt brigde..back to fyn..