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Author Topic: 1971 Honda 175cc Cafe Build  (Read 24552 times)

Offline DirtbagUT

  • Posts: 46
Re: 1971 Honda 175cc Cafe Build
« Reply #30 on: May 06, 2012, 00:39:01 »
looking good... I almost got the same tank for my cb125 at the junk yard today but it looked big...

Offline dcbryan

  • Posts: 25
Re: 1971 Honda 175cc Cafe Build
« Reply #31 on: May 16, 2012, 03:02:46 »
Hey guys, now that I've got that engine back together and back in the frame, I've finally had time to hook up some wiring and see if it'll start. After some trouble shooting I figured out I was blowing fuses every time I turned the key.  Any ideas on where to look for the short?

Thanks for the help.

Offline YogiBear

  • Posts: 1090
Re: 1971 Honda 175cc Cafe Build
« Reply #32 on: May 16, 2012, 03:22:05 »
Hey guys, now that I've got that engine back together and back in the frame, I've finally had time to hook up some wiring and see if it'll start. After some trouble shooting I figured out I was blowing fuses every time I turned the key.  Any ideas on where to look for the short?

Thanks for the help.

The ignition switch maybe

Offline dcbryan

  • Posts: 25
Re: 1971 Honda 175cc Cafe Build
« Reply #33 on: May 16, 2012, 03:24:26 »
Also, I guess I'm lacking a fundamental understanding of what causes a fuse to blow.  Obviously if more than 15amps go through it, then it pops. But if say, I have power shorting out to the frame, how does that cause an increase in amperage? 

Offline Big Rich

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Re: 1971 Honda 175cc Cafe Build
« Reply #34 on: May 16, 2012, 03:28:32 »
start off by unplugging everything you can - but if there's a short somewhere that might not stop it. Do you have the entire bike wired up, or just the ignition? Most likely you have a positive wire/connection grounding out.

Offline dcbryan

  • Posts: 25
Re: 1971 Honda 175cc Cafe Build
« Reply #35 on: May 16, 2012, 03:32:00 »
start off by unplugging everything you can - but if there's a short somewhere that might not stop it. Do you have the entire bike wired up, or just the ignition? Most likely you have a positive wire/connection grounding out.

Good idea.  Right now I have everything but the lights and handlebar switches hooked up. So - ignition, ign coil, condenser, rectifier, generator.  No starter on this bike, so I don't have to worry about that. In the morning, I'll just unplug everything but the ignition on see if still blows.

Offline Big Rich

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Re: 1971 Honda 175cc Cafe Build
« Reply #36 on: May 16, 2012, 03:36:23 »
Do you have a multimeter and a wiring diagram? If so, check all the positive wires for continuity to the negative post on the battery. Shouldn't have any.......

Offline dcbryan

  • Posts: 25
Re: 1971 Honda 175cc Cafe Build
« Reply #37 on: May 16, 2012, 03:44:19 »
Do you have a multimeter and a wiring diagram? If so, check all the positive wires for continuity to the negative post on the battery. Shouldn't have any.......

Yeah I have both. Checking continuity, you're full of great ideas.

Offline dcbryan

  • Posts: 25
Re: 1971 Honda 175cc Cafe Build
« Reply #38 on: May 17, 2012, 12:44:13 »
Got the electrical problems sorted out. So dumb.  I had the black wire that was coming out of the ignition switch grounded. So as soon as the switch was tripped the 12v was grounding to the frame.

Got the carbs set enough to keep it idling. There's quite a bit of smoke when it runs, which I'm hoping will burn off. 

Anyway, nice to know I put the engine back together right. 

Offline 56_oval

  • Posts: 77
Re: 1971 Honda 175cc Cafe Build
« Reply #39 on: May 18, 2012, 06:17:03 »
Good lookin project.  Is that a CL160 tank?