collapse

www.dimecitycycles.com

https://www.townmoto.com/collections/vanson-leathers


www.restocycle.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.bisonmotorsports.com

www.speedmotoco.com

www.lostapostlejewelry.com

www.cognitomoto.com

www.sparckmoto.com

www.pistonsociety.com

www.steeltowngarage.com


Author Topic: CB360 w/slow crank after rebiild  (Read 563 times)

Offline themotoworks

  • Posts: 97
    • the motoworks
Re: CB360 w/slow crank after rebiild
« Reply #20 on: Aug 16, 2018, 16:45:13 »
have you tried pulling the spark plugs out?  that might narrow down whether the starter is having a problem cranking the engine or whether there's something in your reassembly that made things very very tight and the starter is telling you something is wrong in the engine. 

Offline stu.belshe

  • Posts: 126
Re: CB360 w/slow crank after rebiild
« Reply #21 on: Aug 16, 2018, 16:49:24 »
Thanks @themotoworks, I haven't. Curious how pulling the plugs would potentially change what the starter does? Interesting, though I think I'm missing what that would tell me about re-assembly.
'72 CB350
'74 CB360

View my builds and bikes on Instagram @ instagram.com/standardvmoto/

Offline Sonreir

  • Moderator
  • DTT SUPPORTER
  • *
  • Posts: 10847
  • Oregon
Re: CB360 w/slow crank after rebiild
« Reply #22 on: Aug 16, 2018, 16:51:44 »
Thanks @themotoworks, I haven't. Curious how pulling the plugs would potentially change what the starter does? Interesting, though I think I'm missing what that would tell me about re-assembly.

It removes compression from the engine, making things easier to turn. If you're able to use the kicker, but not the electric start, probably no need to do this.
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 stu.belshe

  • Posts: 126
Re: CB360 w/slow crank after rebiild
« Reply #23 on: Aug 16, 2018, 16:53:00 »
Makes sense. I am able to kick it, but I suppose there is a chance it's borderline too tight and pulling the plugs is still a simple test. Thanks for the idea.
'72 CB350
'74 CB360

View my builds and bikes on Instagram @ instagram.com/standardvmoto/

Offline datadavid

  • Posts: 1374
Re: CB360 w/slow crank after rebiild
« Reply #24 on: Aug 16, 2018, 16:54:04 »
Thanks @themotoworks, I haven't. Curious how pulling the plugs would potentially change what the starter does? Interesting, though I think I'm missing what that would tell me about re-assembly.
Pulling the plugs deletes compression. Although since it kicks over and starts fine that would suggest eventual tightness would be located in the cogs connecting starter to crank. Engines can be a bit tough to turn over on first startup with freshly honed bore, but compression would be lower until rings seat properly.

Offline stu.belshe

  • Posts: 126
Re: CB360 w/slow crank after rebiild
« Reply #25 on: Aug 16, 2018, 16:59:03 »
Quote
Pulling the plugs deletes compression. Although since it kicks over and starts fine that would suggest eventual tightness would be located in the cogs connecting starter to crank. Engines can be a bit tough to turn over on first startup with freshly honed bore, but compression would be lower until rings seat properly.

So if I pull the plugs and things spin freely, we know it's an engine issue and the starter if fine just as I assumed given the testing. Is this something in need of a fix or as you stated will improve once the rings seat? 
'72 CB350
'74 CB360

View my builds and bikes on Instagram @ instagram.com/standardvmoto/

Offline datadavid

  • Posts: 1374
Re: CB360 w/slow crank after rebiild
« Reply #26 on: Aug 16, 2018, 17:09:19 »


So if I pull the plugs and things spin freely, we know it's an engine issue and the starter if fine just as I assumed given the testing. Is this something in need of a fix or as you stated will improve once the rings seat?

It might even be harder to turn over once compression is up, i would inspect and clean out the starter engine. Carbon buildup reduces effiency.

Offline stu.belshe

  • Posts: 126
Re: CB360 w/slow crank after rebiild
« Reply #27 on: Aug 16, 2018, 17:10:20 »
Thanks for the help, testing ahead.
'72 CB350
'74 CB360

View my builds and bikes on Instagram @ instagram.com/standardvmoto/

Offline themotoworks

  • Posts: 97
    • the motoworks
Re: CB360 w/slow crank after rebiild
« Reply #28 on: Aug 17, 2018, 09:59:54 »
you can easily kick over a motor that the old honda starters won't turn, the fact that it starts up doesn't necessarily mean there's nothing wrong with the reassembly, most engines will run if you give them no other option, for how long is another story. 

Offline stu.belshe

  • Posts: 126
Re: CB360 w/slow crank after rebiild
« Reply #29 on: Aug 17, 2018, 10:14:11 »
Quote
you can easily kick over a motor that the old honda starters won't turn, the fact that it starts up doesn't necessarily mean there's nothing wrong with the reassembly, most engines will run if you give them no other option, for how long is another story.

Both good and scary to know, haha.
'72 CB350
'74 CB360

View my builds and bikes on Instagram @ instagram.com/standardvmoto/