Rob
Hero member
- Location
- Midlands, UK
Get rid of the Motoplat coils - they'll be the next thing to let you down.
Todd/Boyer (Branson) RGS Ignition Kit questions...
- Thread starter oldbikesrcool
- Start date
oldbikesrcool
Junior member
Hello Rob,-
Me thinks you may be right...
After replacing the disintegrating pick up wires and going for a test ride, all is still not joy. Tonight will be off with the tank, look at the plugs, and consider the next steps?all connections were good and carbs sync?d well. I?ve missed or am missing something(s).
I?ll go over past message strings and determine best-drop-in-coil-replacements for the Motoplats.
Me thinks you may be right...
After replacing the disintegrating pick up wires and going for a test ride, all is still not joy. Tonight will be off with the tank, look at the plugs, and consider the next steps?all connections were good and carbs sync?d well. I?ve missed or am missing something(s).
I?ll go over past message strings and determine best-drop-in-coil-replacements for the Motoplats.
oldbikesrcool
Junior member
Supplemental: No fracturing of the coil bracket And coil grounds good.
Rob
Hero member
- Location
- Midlands, UK
TEK KP03 or MP06 is the cheap and easy option (Kawa ZZR250, Honda VFR ('98) and doubtless many more) although you will need to reterminate the coil secondary connections with conventional 6.3mm spades. They are a drop in replacement
oldbikesrcool
Junior member
Excellent. Thanks Rob!
EBay, here I come (?no longer have a MC breaker anywhere close regionally).
EBay, here I come (?no longer have a MC breaker anywhere close regionally).
oldbikesrcool
Junior member
...and I thought if I pretended not to notice it sitting there on the bench while away at work, it would either have fixed itself or gone away. Alas, it has come to pass. The pretending part. It?s neither fixed nor gone away.
I?ve become so proficient at draining fuel and removing the tank, I didn?t remember doing it this time.
On the bench.
Pulled plugs:
#3 looks reasonable (as before), #2 dead as a door nail (as before), #1 is a tad more powdery grey than #3.
Regarding strobing...
Nothing with timing was fiddled.
It ran well on all three pots with the Bosch ignition modules still installed. It also seemed to run well for a very short 10-15 seconds when I first started it up after having installed the Boyer Todd Unit.
Let me clarify.
Back when I first put everything back together with the newly installed Boyer Todd unit and started it up for its maiden voyage with the new system, it started on the button right away and ran smoothly on all three cylinders (10-15 seconds) and then I pulled in the clutch, shifted into first and immediately killed the engine due to stuck clutch plates (hadn?t turned a wheel in anger since early winter...).
Upon restart, It only ran on 2 pots...and has apparently reverted to two pots since then. This even though good spark was witnessed at the plug ends after fixing that dodgy coil quick connector and changing out to new B8ES plugs and 5 ohm caps.
No joy...
Next, thinking the disintegrating pick up wires were worse than I originally thought, potentially having run the length of the pick up loom, I replaced the entire loom with new wiring.
Still no joy.
So, perhaps duff #2 Autoplat coil or duff #2 ignition pick up?? Is there a sure way to test the Bosch magnetic pickups?
I doubt the center Boyer module has gone walkabout.
All three Motoplat coil values (primary) read ~4.7 ohm and plug-cap-to-coil terminal read 16k ohm through new 5k ohm caps.
All three ?Lav Forum recommended? eBay purchased TEC KP03 coils (primary) read ~2.6 ohm and plug-cap-to-coil terminal read 20k ohm through new 5k ohm caps.
Me thinks THEN,
If / when all else fails, perhaps I could try the original Bosch system and see if Anything changes?
Discuss.
I?ve become so proficient at draining fuel and removing the tank, I didn?t remember doing it this time.
On the bench.
Pulled plugs:
#3 looks reasonable (as before), #2 dead as a door nail (as before), #1 is a tad more powdery grey than #3.
Regarding strobing...
Nothing with timing was fiddled.
It ran well on all three pots with the Bosch ignition modules still installed. It also seemed to run well for a very short 10-15 seconds when I first started it up after having installed the Boyer Todd Unit.
Let me clarify.
Back when I first put everything back together with the newly installed Boyer Todd unit and started it up for its maiden voyage with the new system, it started on the button right away and ran smoothly on all three cylinders (10-15 seconds) and then I pulled in the clutch, shifted into first and immediately killed the engine due to stuck clutch plates (hadn?t turned a wheel in anger since early winter...).
Upon restart, It only ran on 2 pots...and has apparently reverted to two pots since then. This even though good spark was witnessed at the plug ends after fixing that dodgy coil quick connector and changing out to new B8ES plugs and 5 ohm caps.
No joy...
Next, thinking the disintegrating pick up wires were worse than I originally thought, potentially having run the length of the pick up loom, I replaced the entire loom with new wiring.
Still no joy.
So, perhaps duff #2 Autoplat coil or duff #2 ignition pick up?? Is there a sure way to test the Bosch magnetic pickups?
I doubt the center Boyer module has gone walkabout.
All three Motoplat coil values (primary) read ~4.7 ohm and plug-cap-to-coil terminal read 16k ohm through new 5k ohm caps.
All three ?Lav Forum recommended? eBay purchased TEC KP03 coils (primary) read ~2.6 ohm and plug-cap-to-coil terminal read 20k ohm through new 5k ohm caps.
Me thinks THEN,
If / when all else fails, perhaps I could try the original Bosch system and see if Anything changes?
Discuss.
oldbikesrcool
Junior member
Update...
?Been having sooooo much fun runner ?er, I forgot to finalize and update!
Several weeks ago, while running back through all rework checks and test measurements and still finding the center cylinder a no-spark, decided to throw back on the BTZ set for good measure/comparison. Sure enough, all cylinders firing and functioning. So, it turns out, it was indeed the center Boyer module had gone walkabout. As mentioned previously, the kit I acquired, although appearing unused, wasn?t complete as it was missing the coil loom and did show signs of a previous fitment; the ?reusable? zip-tie was cut for previous removal. Who ever attempted to fit the system way back when, must have had other electrical issues that shorted out the center module...very possibly.
Fortunately, I?m not above groveling, whimpering and pleading for assistance and the good Mr. Phil T provided a perfect replacement module.
Thank You Phil!!!
The rest is history. Another good carb sync and wow!
Pulls like a fright train well into triple digits (allegedly...), idles around town dead solid and fires up instantaneously.
RGS *2194* reporting for duty!
?Been having sooooo much fun runner ?er, I forgot to finalize and update!
Several weeks ago, while running back through all rework checks and test measurements and still finding the center cylinder a no-spark, decided to throw back on the BTZ set for good measure/comparison. Sure enough, all cylinders firing and functioning. So, it turns out, it was indeed the center Boyer module had gone walkabout. As mentioned previously, the kit I acquired, although appearing unused, wasn?t complete as it was missing the coil loom and did show signs of a previous fitment; the ?reusable? zip-tie was cut for previous removal. Who ever attempted to fit the system way back when, must have had other electrical issues that shorted out the center module...very possibly.
Fortunately, I?m not above groveling, whimpering and pleading for assistance and the good Mr. Phil T provided a perfect replacement module.
Thank You Phil!!!
The rest is history. Another good carb sync and wow!
Pulls like a fright train well into triple digits (allegedly...), idles around town dead solid and fires up instantaneously.
RGS *2194* reporting for duty!
Andy
Hero member
- Location
- Auckland, roughly
Nice work 