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Author Topic: 1974 CB360 Fallin' Ditch Hell Ride  (Read 64334 times)

Offline Sonreir

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #350 on: Jun 13, 2017, 14:44:10 »
It would be tricky, but I think possible.

The main problem is the short duration between the firing of the left and right coils, but an occasional misfire of the right side might also be a possibility.

The problem we face is charging the coil field at high RPMs. In four cylinder bikes and 360° twins, you have a longer charge cycle between coils discharges: 360° of crank rotation instead of 180°. Moving to 3Ω coils would help. You might notice ignition cutting out on the right cylinder as RPMs increase into the upper ranges. With the stock setup, you're getting about 6.3 milliseconds to charge each coil (dwell) between firings at 9500 RPM. Halve that for the right cylinder if you go with wasted spark. Typical dwell time, depending on the coil, is between 2ms and 5ms to hit a 100% charge.

The other issue would be potential pre-ignition of the fuel. When the left side is nearing TDC and firing, the right side should be nearing BDC with a cylinder full of fresh air and fuel. It probably won't ignite until compressed, but it might, from time-to-time.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline crazypj

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #351 on: Jun 13, 2017, 17:09:47 »
Leave it to PJ to rain on my BBQ. No worries though. In the spirit of being cheap, I dug out a couple of coils that didn't work and "rebuilt" them. I broke off all the epoxy around the base of the plug wire and the connectors. Then I cut off the ground and power wires, leaving clean terminals. I twisted and pulled the spark plug wire out of the coil body. The plug wire is pushed onto a pin in the same way the plug cap is done. I drilled out the plug wire hole to 8mm down to the pin. Then I pushed the plug wire in, checked resistance (9.5k ohms), and epoxied them in. I checked resistance again before the epoxy set. Then soldered the lead wires- one with yellow, one with blue, a black/white, and a black. Put new NGK resistor caps on, checked primary resistance (14.5k ohms), and secondary resistance (4 ohms). Lastly, I coated the solder connections with liquid rubber.


Sorry but it's probably better to fix it now rather than break down in the middle of 'somewhere'  ;)
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0


Offline Tune-A-Fish©

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #353 on: Jun 16, 2017, 13:38:48 »
Dang


Sent from my iPhone using DO THE TON
"I didn't come here and I ain't leavin"  Willie Nelson

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"Like a Wreckin Ball!" Eric Church

Offline Maritime

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #354 on: Jun 16, 2017, 13:43:24 »
Now I need to watch that at home with sound!  Nice Irk.
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline JustinLonghorn

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #355 on: Jun 16, 2017, 14:24:48 »
Sounds mean.
I'm going to eat your brains and gain your knowledge.

Into The Sunset, CB750 build

TT500 the Animal


Offline Sonreir

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #357 on: Jun 16, 2017, 20:11:29 »
Love the sound of a well tuned 360.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline cxman

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #358 on: Jun 16, 2017, 21:42:11 »
good going
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline Maritime

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Re: 1974 CB360 Fallin' Ditch Hell Ride
« Reply #359 on: Jun 16, 2017, 22:40:40 »
Yep heard it tonight sounds great
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson