Startup after rain.

[BooG]

Bike got a good soaking today, and I went to start it up but could not. It turned over fine, and was biting a bit, firing but not starting. In the end I ran my Odessey P680 down. Never done that before and it actually performed valiantly during the failed start! Any wisdom from anyone as to why this might be the case?
I start up by applying full choke, pulling in clutch lever and applying a tiny bit of throttle as I turn it over. Usually starts.

[Bob_Roller]

Usually hard starting in wet, or damp conditions, points to the high voltage secondary circuit of the ignition system .

Ignition leads, or coil issues .

[montmil]

Are you still running the OEM Bosch Crack-O-Matic coil? Gray and black. If the coil has tiny cracks, it is toast and will prevent regular starts even with a heavy dew on the scoot. Dyna coil... woohoo!

Monte

[Bob_Roller]

According to his profile, it's an '80 model year bike, so I don't think it has the suspect dual output coil .

[Rob Valdez 79 R65]

I am surprised that you don't already know the answer to this one, Boo.

While looking for my posting on NGK caps vs. OEM,
I scrolled up to see you commenting on the metal-cased plug caps, over two years ago!

What do you have on your bike?

[BooG]

Well I still have the metal ones on!! OK then... I'll see about changing those suckers out and I'll check the coil info as well. Battery on charge. Thanks for responses.

[BooG]

Have ordered all the bits to make my own leads and am gonna swap to the NGK caps as well. New NGK plugs as well.
The coils are the Bosch ones with the orange/Brown tops. Both sides are sparking, but weakly, and there was no bite at all when I tried to start today.
So, Dyna coil then....have looked at the various threads on installing and it seems straightforward enough. I'm right in thinking that it dosen't matter which lead goes into which terminal on the Dyna?

[montmil]

So, Dyna coil then....have looked at the various threads on installing and it seems straightforward enough. I'm right in thinking that it dosen't matter which lead goes into which terminal on the Dyna?

Correct. The instruction sheet from Motorrad Elektrik explains all. http://www.motoelekt.com/index.html

[Bob_Roller]

The Dyna coils, are not direct replacements for the OEM coils .

I don't know if you are going to install a single dual output coil, or two single output coils .

But adapter brackets of some sort will be required regardless which way you go .

[Barry]

If you are still using points you will need the 12 volt 3 ohm Dyna coil with dual outputs I think that is the green one. A lower impeadance coil of the electronic ignition type will burn the points more quickly as they were not designed to handle the higher primary current resulting from the use of such a coil.

I'll be interested to see how a Dyna improves your spark as I'm still on the original twin 6 volt coils although I have fitted a points amplifier which improved the spark some and I currently have no problems.

[BooG]

Anyone know how I go about hooking up the electrics from the old twin coils to the single dual output Dyna coil? I'm a bit rubbish with electrics.

[Bob_Roller]

All you really need to do, is connect one set of wires to the terminals on the new coil .

It doesn't matter which way you connect them .

The other set of wires can have insulated tape put on the wire ends, and then ty-wrapped out of the way, or cut the terminal ends off, and put crimp-on caps on the wires .

[Barry]

Connect the blue/green wire (Terminal 15 on your existing rear coil) to one terminal of your new coil and the two black wires (Terminal 1 on existing front coil) to the other terminal of your new coil.  

The blue/green wire is the +ve feed from the ignition switch.
One of the black wires goes to the points and the other to the Tachometer.  
The black/Yellow link wire between the two old coils is not required.

[BooG]

Ok, just checking....its this coil I want, the Green DC6-1 with dual outputs and 3.0ohms primary resistance? If so, thats only £62.33p!
www.dynatek.com/sports_bikes_ignition_coils.html

[Adamastor]

I drove this weekend 300km on rainy weather, and my R65 was fine... God bless the Dyna coil