Laverda SF2 misfiring?/fuel? 4000-5000rpm

Laverdalothar said:
didn't I say take away the ones that have to do with battery failure? What has the ignition to do with a bad battery? You can't start the bike even if the battery is empty, so what do I care about ignition if I can't even turn the engine over?

Treating your battery as it should is one easy thing to do and not only helps on the ignition...

Oh - forgott: the 750 SF I restored also got DMC2. You barely had to push the starter button to make that beast bark into life. not one missing beat, one of the cleanest ideling bikes I have ever come across and nicely going up the rev range. That said, the bike hasn't covered many miles yet (I think 4.000 now, 4 years after restoration, me doing the first 2.000 in the first year...). The buyer did claim about the brakes, the suspension etc., but never about starting the engine or riding it...  ;)
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Electronic ignition won't do that, ignite, under a certain voltage. Points will fire with just a few measly volts.
A low battery isn't battery failure.
Any 750 will fire after a few months neglect with just a touch of the button.

Trickle charging a battery every time you lay a machine up for a while is a right pain in the ass  :D

Paul
 
Trickle charging a battery every time you lay a machine up for a while is a right pain in the ass 
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Arse.  I just plug my C-Tek into the socket on my handlebars.  Probably doesn't need it, but I have a fancy battery charger so I may as well.
 
I reckon ya timing might be off a little ? may be a little to advanced ?? hard to start you say...
Check ya TDC with your initial DMC set up !

Or maybe try a different curve setting on your control box  :-\  maybe able to tune flat spot out.
 
Paul Marx said:
Electronic ignition won't do that, ignite, under a certain voltage. Points will fire with just a few measly volts.
A low battery isn't battery failure.
Any 750 will fire after a few months neglect with just a touch of the button.

Trickle charging a battery every time you lay a machine up for a while is a right pain in the ass  :D

Paul
Click to expand...

sorry, have seen to many that don't...

if you use a connector cable from the charger that simply holds to the frame with a zip-tie at a point where you can access it easily, it is 5 second job to do that. http://www.ctek.de/int/en/chargers/Comfort%20Connect%20Eyelet%20M6

Welcome to the new century...  ;)
 
Well the original points in my SFC are way pass their use by date and from what I understand are no longer available or damn expensive if you find some, so If I ever start riding it again I'll be investing in an electronic ignition. I find the timing is needs to be spot on for the SFC to run sweet so electronic ignition is the way forward for me. Set and forget!!
 
And if I may but in, ,Sam hasn't ben on here for a while and from memory the bike was running like a champion, rebuilt from bottom up if I recall? What pickups are you running mate? I had the same problem with my non jota Redax gelati, pickups was the problem...
 
Sorry but hadn't much time, work takes all my time for the moment...

First I will take a look again at the carbs and the sprak meligs from there on I will see....
Thats for this weekend plannend.

Just strange had it first... Cleaned accelarotor pumps on carbs and oiled them... Did test run ok bike Pulled again strong to 7500 rpm 8)

Will update after this weekend.

Greetings Sam
 
Grant said:
Dream on Paul.
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Will do Grant.
Off to Italy on smaller roads tomorrow if a rotten tooth doesn't stop me.
Very much looking forward to the Alps behind some very fast riders on nimble bikes.

Now where's that dentist?

Paul
 
Cosi said:
And if I may but in, ,Sam hasn't ben on here for a while and from memory the bike was running like a champion, rebuilt from bottom up if I recall? What pickups are you running mate? I had the same problem with my non jota Redax gelati, pickups was the problem...
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Could be onto something there. He says it's a Piranha so that's possibly optical pick ups - didn't they cause problems to someone when used in a hot environment?
 
optical sensors typically don't like f.e. dirt, oil steem, water and anything else that can block the sensor...  ;) That's why the oil-seal should be good and the cover should be mounted when riding.
 
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