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: 1980 CB900F Build  (Read 4187 times)

Offline crazypj

  • Posts: 13175
  • Split personality, I fake being smart
Re: 1980 CB900F Build
« Reply #50 on: Feb 02, 2018, 19:49:55 »
You should have wiring already in handlebar switch? Does it have ON-OFF position on right hand switch/throttle housing or is it USA type? (blanked off)
I know I'm going to have to dig out manual to check but tail light should be on handlebar switch input not output side
« Last Edit: Feb 02, 2018, 19:53:35 by crazypj »
'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

Re: 1980 CB900F Build
« Reply #51 on: Feb 06, 2018, 00:15:43 »
I dropped the seat pan off at the upholsterer, he put some foam on it and I chose a material to cover it in. He also quoted me $440 for the work, I was hoping for less but his work is reputable. Also haven't finished the wiring yet as I have been working on some other projects. I have a few fiddly jobs to do on the bike while I wait because I can't pick the seat up until next Tuesday. Hopefully I can do my first test ride then.
« Last Edit: Feb 06, 2018, 04:31:28 by Tim of all trades »
A knight in shining armour is a man who has never had his metal truly tested.

Offline 1fasgsxr

  • Posts: 1498
Re: 1980 CB900F Build
« Reply #52 on: Feb 06, 2018, 13:16:17 »
OUCH...440 for a seat..your pan?
http://www.dotheton.com/forum/index.php?topic=41083.0

Life is a journey from the maternity ward to the crematorium....

Re: 1980 CB900F Build
« Reply #53 on: Feb 14, 2018, 07:58:42 »
Got the seat but it didn't fit on the bike because I didn't allow for the thickness of the material when I made the pan, I bent the tab that sticks out the front down lower and now it fits.

The tail light comes on with the ignition and the hi low beam is back to normal. No stealth mode :( Only problem is with the rear brake return spring, its a bit saggy so it doesn't pull the lever back up so the brake light stays on even after my foot is off the brake. I will add that spring  to the list for the next lot of parts to order.
I am missing a bolt to hold the caliper on but the dad of all trades has already put one in the post.

Getting close to the end!
A knight in shining armour is a man who has never had his metal truly tested.

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9334
Re: 1980 CB900F Build
« Reply #54 on: Feb 14, 2018, 09:26:08 »
Nice work, hop you put the fender back or a brace on the front, makes a big difference in handling.
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 crazypj

  • Posts: 13175
  • Split personality, I fake being smart
Re: 1980 CB900F Build
« Reply #55 on: Feb 14, 2018, 20:39:59 »
Those 'pods' are going to try and turn 'inside out' as they severely restrict airflow over 6k even on a CB/CM400
'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

Re: 1980 CB900F Build
« Reply #56 on: Aug 03, 2018, 04:54:01 »
Ok, I am back to working on my bike as this place slowly claws its way out of winter and back above freezing. Also I am back to full time work so have been very busy.
I got got the bike running but not very well so I ordered and installed the dyna-jet kit and I could not believe how good the bike is running now! except... Its only running on the outside two cylinders. I put fresh spark plugs in and tested the coils and they both have good spark, I checked compression and it was good too. Fresh fuel and more carby cleaner with high pressure air gun to triple check that no fuel passage was blocked and also checked the bowls were full of fuel. I swapped the leads from the spark plugs around and it was still just the outside two cylinders that were running. Im thinking that the signal wires are around the wrong way, cant remember if they are coming from the reg/rec or the stator. I working through the weekend and next week but i have a few hours Sunday I can duck home on start digging through the wiring.
A knight in shining armour is a man who has never had his metal truly tested.

Offline crazypj

  • Posts: 13175
  • Split personality, I fake being smart
Re: 1980 CB900F Build
« Reply #57 on: Aug 03, 2018, 13:37:05 »
If outside cylinders are running, signal /trigger has to be OK for 1:4. 2:3 could be trigger or ignitor. I think they are either under seat or left side panel. Alloy blocks about 1-1/2" square. Also check wiring from crankcase, I've seen it get damaged by exhaust when it wasn't routed properly. May be worth pulling sprocket cover, just in case something isn't right under there? (seen wiring cut be cover fitted wrong, foreign objects going around with drive chain, etc)
'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 cxman

  • DTT SUPPORTER
  • *
  • Posts: 2507
Re: 1980 CB900F Build
« Reply #58 on: Aug 03, 2018, 16:44:51 »
pulse generator test

the 4 wires are in pairs yellow and yellow with white trace

blue and blue with white trace

530 ohms plus or minus 60 ohms between each colored pair

no continuity on any of the wires to ground

check for 12v at both coils

swap coils side to side

swap igniters side to side
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 crazypj

  • Posts: 13175
  • Split personality, I fake being smart
Re: 1980 CB900F Build
« Reply #59 on: Aug 03, 2018, 21:44:23 »
That's what you've done so far? I'll have to dig manual out and take a look at wiring
« Last Edit: Aug 03, 2018, 21:54:29 by crazypj »
'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