1972 SF750 POINTS PLATE QUESTION

minigunz

minigunz

New member
Location
Ontario CALIFORNIA
I looked into the loose condensers and found yes, they needed new stainless rivets to tighten them up.
Also I have a red and white wire to the points plate, If I look at the plate is the left set of points run the left cylinder?
and the right set run the right cylinder? or ( left points run the right cylinder and the right points run the left cylinder.
I have a red wire was going to the left set of points, and the white was going to the right set of points.
Is this correct?
The bike was purchased not running and the guy who owned it was a Monkey mechanic and fiddled with it.
so I also only have a 6mm hole on the starter clutch housing to go by for the top dead center on each cylinder. no other marks to go by.
the Factory manual claims that there's supposed to be a mark on the starter clutch. I see the mark on the engine case.
so when I rotate the motor to TDC on the left cylinder the right set of points are open.
same for the right cylinder the left set of points are open. is this correct?
I hope there is somebody who can verify this is all correct.
Jeff Tuttobene
 
Just fit the wires to whatever set of points gives you the tidiest wire route. You can simply swap left and right plug leads if it's arse about, ie if it pops and farts when you try and start it! I put a thumb over the plug hole and look for spark with a plug connected and grounded - being a 360 deg twin with points operating at half crank speed, one set of points will always be in the correct position to fire at TDC on compression, the other will be open on exhaust (as long as the oil pump/points cam drive gear has been installed in the correct position in relation to TDC!!).

As for the TDC marks, there should be a straight 'nick' (as if punched by a slot head screwdriver) on the engine case at about 1-2pm above the starter freewheel. That 6mm hole in the starter freewheel should also have a slot mark and these two marks should align at TDC. Basically, set your gaps to 0.4mm and one set of points should be positioned to open statically at exactly TDC. I always found that the points gap would change slightly during timing adjustment ... a bit fiddly but you get there in the end. I was more than happy to go electronic back in about '78 using GS Suzuki trigger, induction backing plate and little black box! Now running Ignitech. But points were super reliable in the many years and km I ran them.

While you can set the timing for reliable running using these marks it's advisable to check and ascertain accurate TDC using a piston stop and a degree wheel.

I made a small jig from angle alu profiling a curve close to the starter freewheel with a slot that gives a far more precise indication of the marks aligning bang on TDC. Hope this helps.
 
Thanks
where do I get my hands on the IGNITECH ignition?
I am waiting on the 2 new BOSCH ignition coils and see if this bike runs.
while I was in the ignition I removed the advancer assembly and replaced the seal behind everything.
saw a little weep of oil when I removed the points plate.
all kinds of things were an issue on this bike.
I love the forum for help when I need it.
Jeff
 
Definitely worth checking the alignment of the marks on the rotor and case. As you can see on the photo, TDC doesnt align with the case mark hi-lighted with white paint. The pencil line on the tape is now correct.
I measured TDC using a dial gauge.
It's about 5deg off. I'll be remarking the case. So I've been setting the ignition 5deg retarded for the last 43 years of owning the SFC.
I found this error while fitting the new ignitech ignition.
Redax in Oz is the man for the ignition.
 

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Jeffrey Tuttobene said:
Thanks
where do I get my hands on the IGNITECH ignition?
I am waiting on the 2 new BOSCH ignition coils and see if this bike runs.
while I was in the ignition I removed the advancer assembly and replaced the seal behind everything.
saw a little weep of oil when I removed the points plate.
all kinds of things were an issue on this bike.
I love the forum for help when I need it.
Jeff
Click to expand...
You can simply swap wires to the points plate over if you think that they're not right.
It's better to use nuts and bolts to secure the condensers rather than rivets.

Electronic for motorbikes - IgniTech Přelouč

www.ignitech.cz

Paul
 
motoddrob said:
Definitely worth checking the alignment of the marks on the rotor and case. As you can see on the photo, TDC doesnt align with the case mark hi-lighted with white paint. The pencil line on the tape is now correct.
I measured TDC using a dial gauge.
It's about 5deg off. I'll be remarking the case. So I've been setting the ignition 5deg retarded for the last 43 years of owning the SFC.
I found this error while fitting the new ignitech ignition.
Redax in Oz is the man for the ignition.
Click to expand...
Paul Marx said:
You can simply swap wires to the points plate over if you think that they're not right.
It's better to use nuts and bolts to secure the condensers rather than rivets.

Electronic for motorbikes - IgniTech Přelouč

www.ignitech.cz

Paul
Click to expand...
 
Thank you for the reply.
(Redix in Oz), Can you reply about an ignition system that can Elamite the point's system on my SF75O?
I have tried UK sellers about the systems and the tariffs from Diaper Donny here in the USA are keeping
me from Ording any parts for my bike. there is a tariff code I found in the system Tariff that allows agriculture tractors to receive
parts for free of tariffs.
I have sent email this contact info@edknet.de an email and am waiting for his Response. his electronic ignition system.
part number ZP-LAVSF75 price 302 URO Plus shipping approximant 35 EURO tariff.
Laverda made tractors also. why not ship parts here under that clause in the law.'. Found for the tariff it's parts under HTS number (4012.19.20.00 ) (8407.32.10) ( 8407.90.10) to be installed on tractor tractors suitable for agriculture use. Free from tariffs. This seems to be required for all shippers sending parts to the NAZI nation now of the USA under trump
this gives any shipper access's the right to EXPORT of parts to the USA part to be installed as parts in tractors suitable for agriculture use, for free of any tariffs in the USA. Vintage or otherwise.
I have to thank Edo Kleiber in Germany for sending me the link to the Tarff laws web site. He has the cdi ignition under ELECTRINIC-DATA-KLEIBER Email info@edknet,de here is the part number ZP-LAV75/1 he is out of the Germany. has anyone used this ignition
Jeffhttps://hts.usitc.gov/search?query=electronic%20ignition
 
Thank you for the reply.
(Redix in Oz), Can you reply about an ignition system that can Elamite the point's system on my SF75O?
I have tried UK sellers about the systems and the tariffs from Diaper Donny here in the USA are keeping
me from Ording any parts for my bike. there is a tariff code I found in the system Tariff that allows agriculture tractors to receive
parts for free of tariffs.
I have sent email this contact info@edknet.de an email and am waiting for his Response. his electronic ignition system.
part number ZP-LAVSF75 price 302 URO Plus shipping approximant 35 EURO tariff.
Laverda made tractors also. why not ship parts here under that clause in the law.'. Found for the tariff it's parts under HTS number (4012.19.20.00 ) (8407.32.10) ( 8407.90.10) to be installed on tractor tractors suitable for agriculture use. Free from tariffs. This seems to be required for all shippers sending parts to the NAZI nation now of the USA under trump
this gives any shipper access's the right to EXPORT of parts to the USA part to be installed as parts in tractors suitable for agriculture use, for free of any tariffs in the USA. Vintage or otherwise.
I have to thank Edo Kleiber in Germany for sending me the link to the Tarff laws web site. He has the cdi ignition under ELECTRINIC-DATA-KLEIBER Email info@edknet,de here is the part number ZP-LAV75/1 he is out of the Germany. has anyone used this ignition
Jeffhttps://hts.usitc.gov/search?query=electronic%20ignition
 

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It's Redax in Qld, Australia. redax@redaxlaverda.com.au

There are several options for electronic, including custom making your own - mine was based on the GS Suzukis and was very simple to set up, retaining the original coils. I can highly recommend Red's (Redax) Ignitech systems - plug and play, and if you learn to use the programme, fully adjustable.
 
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