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schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6954
I guess we've been focusing

I guess we've been focusing on the "no gas" when starting hot. But certainly, a symptom of a bike not starting when hot is a failing coil. The original coils get "squishy" when then get old. What happens internally is the one single strand of wire that comprises the coil breaks into a number of small segments. The whole length is needed to perform well, but the smaller sections of wire can't carry the current it needs to be able to create the spark for starting. The /2 magneto system is at its weakest when trying to start. Mentioned earlier, the magneto needs to be timed very accurately in order to produce the hottest spark when trying to start. Then engine is turning at a slow speed and everything must be near perfect to start. The magneto builds a stronger spark as the RPM increases...but that doesn't help at kicking speeds.

Vech sells the Emerald Isle solid state coil. It's hidden under the front cover and only you will know it's there. A good investment.

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

rusty sprocket
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Rapid city, SD USA
Joined: 03/02/2015
Posts: 71
I have really been

I have really been concentrating on the gas but after going through every possible variable It just doesn't add up that the carb would work fine when its cold but then all of a sudden not work after a short ride. It would make sense that the weak spark might be the culprit. I guess we will see. And the dipping the spark plug in fuel would make it easier for a weak spark to ignite the fuel. Quite possibly I was helping the weak spark by doing this to get it started. I am anxious to see the results of a new coil. thanks!

rusty sprocket
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Rapid city, SD USA
Joined: 03/02/2015
Posts: 71
****Update****

New Coil, points, condenser

Now it starts on the first or second kick and runs like the finest Swiss timepiece. Happy BMW owner now Smile

schrader7032
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VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 6954
Bueno!!

Bueno!!

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Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

butch
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williamsburg, ky
Joined: 08/29/2010
Posts: 81
wow, what a lot of posts here

wow, what a lot of posts here !
I think it may be time to get back to the basics to really sort this out.

1- How do u clean the carbs ? I suggest u get a gallon can of GUNK CARB cleaner & carefully take the carbs apart & soak everything over nite. U can't get it all in the can at once so it will take u at least a couple of days to go thru the cleaning procedure & u may very well have to soak everything more than once. Examine all parts w/ magnification & if there is ANY crap on any part do it agn. After cleaning wash w/ water & blow out all passages w/ high pressure air (100 psi). Don't try to stick things in the tiny holes of the jets. A new gasket set would be nice.

2.- I'm suspicious of ur mag set up. Go to Vech's website & make sure u understand how to set up the mag, points & static timing.
"Magneto Blues, solving hard start problems" This SEEMS to not be ur problem, if in fact the bike never shows a wet plug, but the mag still has to be correct. I would also get a spare set of plugs. U can clean plugs by heating the tip red hot w/ a torch & letting them cool slowly. If u get a breeze on them they may crack the insulator tho. Scrubbing on the insultors w/ a wire brush CAN ruin the plug. W/ these mags u have no juice to spare when kick starting....but agn if raw gas in the cylinder gets it started it sounds like a fuel issue to me.

It's true that some bikes require their own starting drill but that's already been covered.

Good luck
Butch

butch
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williamsburg, ky
Joined: 08/29/2010
Posts: 81
Glad u solved it . b

Glad u solved it .
b

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