10-15 minutes, then sputters and dies...

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ericheath
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Re: 10-15 minutes, then sputters and dies...

#16

Post by ericheath »

I haven’t installed a C5, but the bolt head rubbing begs to investigate why. Could it not have been seated properly and moved? If so your timing may be off too. Maybe other C5ers will chime in, but any chance you didn’t get the pin lined up? Maybe C5 doesn’t use it, but if it’s still there it would hold the unit out enough for the bolt to hit the cover.
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77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
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delling3
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Re: 10-15 minutes, then sputters and dies...

#17

Post by delling3 »

I installed a C-5 system on my '78, and had similar issues. Bike would start, idle, and accelerate great from cold, but wold start missing/backfiring/etc. after a few miles. If allowed to cool off, it would again start and run as it should, only to repeat the whole thing again.

My C5 was an older version (as compared to what they are selling now). After a ton of time trouble shooting and on the phone with Paul, we took a chance that the ignition module was overheating. Replaced it with the then current generation module, and all was good. Paul had me check the output of my charging system. Turned out that I also had high voltage at the battery when running - around 15 volts at 3000 RPM. I replaced the regulator/rectifier with a unit from Rick's and that brought my charging voltage down to where it should be, and it is very stable (not affected by higher RPM's). Paul said that he had seen one other module with similar damage due to high charging voltage.
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1979 Yamaha XS750SF

Previous:
1978 GL1000 - JUNE 2017 BOTM: Sold
2006 Kawasaki Concours: Sold
1995 Kawasaki Concours: Crashed/totalled.
1976 GL1000: LAST RESTORATION, sold
1981 Honda CB900F Supersport: 3rd restoration, sold.
1979 Yamaha XS-750F: 2nd restoration, sold.
1982 Honda FT-500 Ascot: First (only) new bike. Family forces sale.
1973 CB500 Four: First restoration, long gone.
1972 Suzuki TS-100: First bike, sold.

Only dead fish go with the flow . . .
HomeMadeSin
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Re: 10-15 minutes, then sputters and dies...

#18

Post by HomeMadeSin »

Oh my. I have the old setup also.

Thank you, thank you thank you.
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desertrefugee
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Re: 10-15 minutes, then sputters and dies...

#19

Post by desertrefugee »

Dyna or points time - assuming you won't lay hands on another C5 in three days. But with the overcharging, the Dyna will suffer, too. Might last, might not. Points won't care.
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wingrider
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Re: 10-15 minutes, then sputters and dies...

#20

Post by wingrider »

I agree, if you happened to have the points setup laying around, it wouldn’t hurt to put that on and see if it runs better. I would also contact Paul and see if you can buy just the Ignition module. The C5 is a great system to play with.
2002 1800 Wing
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delling3
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Re: 10-15 minutes, then sputters and dies...

#21

Post by delling3 »

I was able to purchase just the module. No issues.
delling3

1979 Yamaha XS750SF

Previous:
1978 GL1000 - JUNE 2017 BOTM: Sold
2006 Kawasaki Concours: Sold
1995 Kawasaki Concours: Crashed/totalled.
1976 GL1000: LAST RESTORATION, sold
1981 Honda CB900F Supersport: 3rd restoration, sold.
1979 Yamaha XS-750F: 2nd restoration, sold.
1982 Honda FT-500 Ascot: First (only) new bike. Family forces sale.
1973 CB500 Four: First restoration, long gone.
1972 Suzuki TS-100: First bike, sold.

Only dead fish go with the flow . . .
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Re: 10-15 minutes, then sputters and dies...

#22

Post by HomeMadeSin »

I have a complete Dyna ignition and pair of coils unused and still in their boxes. I brought the advancing unit but left the points system behind.

I’ve already removed the RLU and bypassed it. And I removed the stock rectifier and regulator with a hot shot combo unit from Rick’s. And just for good measure, I’ve installed a fresh 7v regulator to replace the homemade breadboard system that it had prior.
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Re: 10-15 minutes, then sputters and dies...

#23

Post by HomeMadeSin »

The decision now is to either install the Dyna system and remove the C-5 bought August last year (just FYI) or try to rush a new C-5 in time and lose pre-trip saddle time. Of course that is assuming it is available and could ship. Plus, not sure how the discussion will go and how much $$$. The Dyna system is already bought and paid for. But I really like the C-5 system (when it works).
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Re: 10-15 minutes, then sputters and dies...

#24

Post by wingrider »

Once you get your charging system in order...
Toss the Dyna in and see if it runs any better. If it does, you know the module is bad in the C5. Make your trip on the Dyna, and then repair the C5 and make your final decision.
Last edited by wingrider on Sun Jun 03, 2018 9:56 pm, edited 1 time in total.
2002 1800 Wing
2001 Valkyrie Interstate
1978 1200 EFI Wing with Motorvation Coupe Royale sidecar
1977 1200 Wing cafe/bobber project
1974 Suzuki GT550
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robin1731
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Re: 10-15 minutes, then sputters and dies...

#25

Post by robin1731 »

Do not do anything until you are sure the charging system is right.

Over charging will hurt nearly any ignition over time. And as stated pretty early in this thread it can kill the battery. I forget his name but we had a member here that had his battery explode while riding due to high voltage.

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Re: 10-15 minutes, then sputters and dies...

#26

Post by HomeMadeSin »

Where’s the AC/DC icon when I need it....
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77Gowing
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Re: 10-15 minutes, then sputters and dies...

#27

Post by 77Gowing »

77Gowing wrote:Some of the aluminum dust could cover some of the C5 optical wheel slots, or cover the emiter detector pair over the wheel.
Forgot to mention that I have a C5 also. I can surmise the aluminum dust could cause false triggering from what I described above.
I fully agree with the idea of also making sure your Bat voltage regulation is repaired before you shove off.
Good luck I hope you make it.
"Less is More" Anonymous

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Re: 10-15 minutes, then sputters and dies...

#28

Post by HomeMadeSin »

Finally converted to Dyna system. It’s 1:30am. First, C-5 removal. Then find suitable screws for Dyna plate. Disassemble advancer per instructions and reassemble with Dyna rotor. Ooops. Lost all power - power tap lug snapped. That took a while to get to and fix. Then static time it; wait the plug wires from the C-5 coil pack don’t work for the Dyna set. Race to 3 different auto stores but Ben had a set. Had to sort out headlight, turn signals, etc. But she starts and runs well. I didn’t go for a spin yet as this time of morning in Commerce City is higher risk than I want. Will ride tomorrow but feeling optimistic. Just over 36 hours to launch.
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Re: 10-15 minutes, then sputters and dies...

#29

Post by desertrefugee »

Still thrashing. Sounds promising.
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Re: 10-15 minutes, then sputters and dies...

#30

Post by HomeMadeSin »

I would be remiss if I didn’t at least mention more about the C-5 situation. I took the initiative to remove my C-5 and put in the Dyna system given the trip kick off time was approaching. All has gone well with that decision so far.

But the other bike that was to use a C-5...well that had a newer “stock housing” version. It had an issue with being limited to approximately 7700rpm (rev limiter). So at the last minute we removed it and put my older C-5 in its place. No rev limit and has run well (mostly) for the trip so far (it is on a 1979 GW now). He did have some similar issues to what I’d did when noticing his voltage was high and als blew a fuse. So I would definitely say that sorting out the electrics is priority number one if running a C-5. It seems to be more sensitive to 40 year of wiring issues than the Dyna. But when it (C-5) is dialed in I would prefer it over the Dyna.
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