Some advice please
- Thread starter Duchess
- Start date
Easy one to answer that, twice as many sparks as the one spark version.
Duchess said:(laughing) ... ok
.. and the benefits of that are ..... ? Bear in mind I'm no mechanic
More sparks.
Therefore less chance of the fuel in the combustion chamber not being burnt unevenly.
Or in other words, the fuel gets ignited better, consequently the bike should run smoother.
A bit smoother Karen, as BTBR said.
I have owned both versions and certainly found the twin spark better for the off-road nonsense. Not as noticable on normal road riding, for me at least.
Slainte
I have owned both versions and certainly found the twin spark better for the off-road nonsense. Not as noticable on normal road riding, for me at least.
Slainte
I believe the twin spark was introduced to combat the stalling and surging problems apparent on many single spark models.These problems can also,to a large extent,be cured by fitting an Iridium extended tip spark plug.I first fitted one to my Dakar 22,000mls ago and have had no surging since.
Tony
Tony
The old/new GS has the same engine as my Scarver.
There is a new/old Scarver too.
Old=one spark plug, new=two spark plugs.
When it needs to adjust valve clearance, it is easy to remove a shim without remove the camshaft on the old one spark engine.
On the new two spark there is a cap covering the shims so you (not you personally, Duchess!) have to remove the camshaft, and that means you might get some trouble to time up the engine after the job.
But don't worry about it if you want your dealer to adjust the valve clearance for you - they know how to do it!
The first F650's har two carburators, the first injected F650's is one spark, the last has two spark. All have chain. The only F650 with a belt is the Scarver.
The factory lowered GS has a lower seat then the Scarver.
The rest of the bikes are different from my belted Scarver, but a few parts fits the injected F650's and the Scarver, like some parts on the handle bar area, some fuses, some light bulbs, the top box (if you change the luggage rack on the Scarver) and the blinker fluid. (
blinker fluid! )
Some of the one sparked F650's, GS or not, surge - they have trouble making the engine work smooth all the time. Some of them, not all - mine are OK.
Because the 650 has one big room inside the engine, 650ccm, they figured it needs two sparks to make all the petrol ''burn''.
Some owners of the old boxers R100 gave the engine one more spark per cylinder because of the big room (500ccm) and only one spark. The old boxers works fine with just one spark plug per cylinder, but it seems to work even better with two spark plugs per cylinder.
So:
Injected;
one spark = more easy to adjust valve clearance at home.
two spark = perhaps feels better to ride because it ''burns'' the petrol better inside the engine.
Carburated, one spark = old. (-Is there an carburated GS? The carburated are Funduro and Strada?)
Liv.
(Alomost all modern motorbikes and cars has injection OR carburator(s). Injected engines needs less petrol, and they often have a catalytic converter. Catalytic converter = cat - it cleans the exhaust before it gets out in the air.
...and there is diesel, but I feel sure you are not going to find an BMW F650 with a diesel engine! Diesel = no carburator, old or new.)
There is a new/old Scarver too.
Old=one spark plug, new=two spark plugs.
When it needs to adjust valve clearance, it is easy to remove a shim without remove the camshaft on the old one spark engine.
On the new two spark there is a cap covering the shims so you (not you personally, Duchess!) have to remove the camshaft, and that means you might get some trouble to time up the engine after the job.
But don't worry about it if you want your dealer to adjust the valve clearance for you - they know how to do it!
The first F650's har two carburators, the first injected F650's is one spark, the last has two spark. All have chain. The only F650 with a belt is the Scarver.
The factory lowered GS has a lower seat then the Scarver.
The rest of the bikes are different from my belted Scarver, but a few parts fits the injected F650's and the Scarver, like some parts on the handle bar area, some fuses, some light bulbs, the top box (if you change the luggage rack on the Scarver) and the blinker fluid. (
blinker fluid! )Some of the one sparked F650's, GS or not, surge - they have trouble making the engine work smooth all the time. Some of them, not all - mine are OK.
Because the 650 has one big room inside the engine, 650ccm, they figured it needs two sparks to make all the petrol ''burn''.
Some owners of the old boxers R100 gave the engine one more spark per cylinder because of the big room (500ccm) and only one spark. The old boxers works fine with just one spark plug per cylinder, but it seems to work even better with two spark plugs per cylinder.
So:
Injected;
one spark = more easy to adjust valve clearance at home.
two spark = perhaps feels better to ride because it ''burns'' the petrol better inside the engine.
Carburated, one spark = old. (-Is there an carburated GS? The carburated are Funduro and Strada?)
Liv.(Alomost all modern motorbikes and cars has injection OR carburator(s). Injected engines needs less petrol, and they often have a catalytic converter. Catalytic converter = cat - it cleans the exhaust before it gets out in the air.
...and there is diesel, but I feel sure you are not going to find an BMW F650 with a diesel engine! Diesel = no carburator, old or new.)
As said... much smoother and much more economical
Would consistantly put two to three litres less in my twin spark than the girfriends earlier single spark model. 120 to 180 miles a day, riding together, staying together, riding as one, consistantly 2 to 3 litres less
www.adventure.gs
Would consistantly put two to three litres less in my twin spark than the girfriends earlier single spark model. 120 to 180 miles a day, riding together, staying together, riding as one, consistantly 2 to 3 litres less
www.adventure.gs
Watch this space for 600 Hornet for sale. 
Good girl Karen, soon to be a two GS family!
Great to meet up with you and Kev again.
Bye for now.
Brian.
Good girl Karen, soon to be a two GS family!
Great to meet up with you and Kev again.
Bye for now.
Brian.
Carburated, one spark = old. (-Is there an carburated GS? The carburated are Funduro and Strada?)
just a irelevent correction
the old funduros ans stradas were twin spark i know this as i have a 94 funduro
and im still thrashing the pants of it
just a irelevent correction
the old funduros ans stradas were twin spark i know this as i have a 94 funduro
and im still thrashing the pants of it
Thank you!wedgie said:Carburated, one spark = old. (-Is there an carburated GS? The carburated are Funduro and Strada?)
just a irelevent correction
the old funduros ans stradas were twin spark i know this as i have a 94 funduro
Strada & Fundoro = two sparks, two carburators, and one chain.
(Well, there is one more chain, but that is inside the engine.)
Liv, the belted sausepan viking.
Liv,
Liv,
your explanation is GOOD you have a talent for explaining mechanical stuff to the UNmechanical 
~~
Og (semi mechanical
)
Liv,
your explanation is GOOD
you have a talent for explaining mechanical stuff to the UNmechanical ~~
Og (semi mechanical
)
Thank you!Ogmios said:Liv,
your explanation is GOOD
~~
Og (semi mechanical
I often try to explain mechanical stuff for girls I know, to make them understand things, and to prevent ''clever experts'' to sell them bad bikes or send the bike to the dealer for things you can fix yourselfes.
All the members of my Club Scarver know how to change oil, if they read my e-mails! And I send them a CD with pics showing how to do it, if they want it.
The more you know, the more freedom you get! Freedom to choose selfes, freedom to spend money elsewhere then at the dealer, freedom to fix things on the road if you get troubles with the bike.
Girls!
I really hope you, all girls, specially those who not have a box stuffed with money under their bed, learn more about motorbikes and cars - it is useful!
Put a clean mat on the ground, bring camera, a notepad, lay down on your back and have a close look at your bike from the stand and up! Relax and look!
-Perhaps you figure out how to change the blinker fluid? 
Liv.
Liv said:Girls!
I really hope you, all girls, specially those who not have a box stuffed with money under their bed, learn more about motorbikes and cars - it is useful!
Put a clean mat on the ground, bring camera, a notepad, lay down on your back and have a close look at your bike from the stand and up! Relax and look!
I know the pretty basic stuff ... but I wouldnt mind going on a course thats not going to cost me an absolute 'arm & a leg' to learn a little more, get more hands on.
Is there anybody out there that would be prepared to put on a basic mechanic's course for ladies ? Does anybody know ?
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