XS1100 AUSTRALIA
XS1100 Topics => Modifications => Topic started by: excess.11 on July 02, 2010, 09:32:51 AM
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Anyone have any thoughts on the following.The coils on my 78E have a primary res of 1.5 ohms plus or minus 10%.The secondary hi tension cables have a res of 15k ohms plus or minus 20% as per original w/shop manual.As my hi tens leads are suffering from going hard and getting shorter i have sourced replacements that measure Primary 3.1 secondary 11.8K .
Don t know which model yamaha these are from but they have a 4H7-82310-60-00
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Hey mate . . . Are the replacements new from a dealer or 2nd hand ?
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New but haven t purchased as yet.I want to find out if the diffent resistances might cause a problem with the TDI or any other parts of the electrical or simply give poor spark and performance.
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it would appear that this is the correct part number for your coils....I think....
http://www.benefiscal.co.uk/partinfo.php?myid=4273&mypartno=2H7-82310-60-00
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hi,, you'll have to stick with 1.5 ohm coils on your's to keep it original,,, you can change them around but other electrical changes have to be made as well,,
I think I understand right, the 1.5 coils need the ballast resistor to work with them, and the TCI box,,
putting 3 ohm coils into the system will fry your 2h7 box
the 3 ohm's don't need the resistor and use a 4RO TCI box
the 3ohm coils are for the later model 11's
I hope I have that right :-[
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Thanks Steptoe ,on the update of the tci unit.i believe that the advance and retard vacuum unit is taken care of by the the black box electrically and i would have to plug the vacuum advance on mine if i updated coils and tci box.
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not sure how you'd go forward into technology,, but with one I fixed in town,, we went backwards,
this one was an 81 model that has the later 4RO box that had failed,so we were able to use orig coils but went back to 78-79 with the 2H7 box,,went back to weighted adv unit,, but kept the vacuum adv hooked up,
there is a small miss/flatspot,, but not sure if that is the mix of technology or some thing else
all you can do is give it a try if you've got spares :-\
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If you move to 3-ohm coils you have to remove the ballast resistor. There are many, many standard drivers who have fitted the green Dyna 3-ohm coils after removing the ballast resistor.
If I were you I'd be buying a set of Dyna coils and some nice new leads rather than trying to use a yamaha part.
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they sound like the same coils that came standard on my
bike the coils are marked 4h7, you can still use your original tci, youll just have
to disconnect the ballast resistor and join the 2 wires together.
but as melb stated, your better off with updated coils that put out
much more voltages than the stock ones do.
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Here s another option in line with keeping my perfectly good coils and replacing the hi tens leads on them.Does anyone have a secondhand or faulty coil to possibly dissect and take pics of to post on here to see if new leads themselves can be re attached to the secondary windings.Separating the plastic casing to be able to re glue is uppermost in my mind as i have sourced copper wire hi tens leads already.As my bike is currently still running i don t want to ruin one just yet.This may be a home fix that all can do fairly easily and at a much cheaper cost.To re interate the only problem i have........... is that the hi tens leads have gone hard and got a lot shorter over the years.
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Here's all the info and pictures yo need to modify the old coils ...
http://www.xs11.com/forum/showthread.php?s=&threadid=137
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Now thats what i m talking about! Thanks for the link. :P
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I caught that link about the inline hi tens lead joiner ,but could nt locate it on the web page.I remember years ago someting similar was around and was used inline on the coill to distributor lead for cars that had radio interference probs.
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if I'm thinking of the same thing, it was a condenser, it sat on the side of the dizzy to prevent wuuring coming thru the radio and to stop interference to tele's as you drove down the street
it was a small cylinder about the size of half your little finger
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The NGK splicers are available on EBay. Here's the cheapest .....
http://cgi.ebay.com/ebaymotors/Yamaha-YFS200-Blaster-Warrior-NGK-Plug-Wire-Splicer-_W0QQcmdZViewItemQQhashZitem58884b8f43QQitemZ380243775299QQptZMotorsQ5fATVQ5fPartsQ5fAccessories
Pretty sure it would be cheaper to get them ordered up by Burson's or the like.
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I've re-joined various hi-tension leads by soldering or just twisting the wires together, slotting in an appropriate length of the casing, split with wire removed, around the join, then taping it up, works well. PS all the gossip you hear from 'experts' about the TCI frying itself is a whole load of bollocks, I've run stock 1.5 ohm coils as well as 1.5 ohm dynacoils with ballast resistor removed and running zero resistance leads and caps for years with nothing but total reliability, the TCI handles a low resistance setup piece of piss. Low resistance equals more amps and stronger spark, and tough bickkies if the cage drivers get static on their radios when you cruise on by 8)