Welcome, Guest. Please login or register.
April 27, 2024, 04:42:31 AM

Login with username, password and session length
Search:     Advanced search
BRITISH COLUMBIA CLASSIC MOTORCYCLE CLUB
18467 Posts in 373 Topics by 476 Members
Latest Member: tkoven
* Home Help Search Calendar Login Register
+ 
|-+  BC Club forum boards
| |-+  General Chat and Ideas
| | |-+  Ross’s CB750 project 		« previous next »
Pages: [1] 2 3 4 5 6 Go Down Print
Author Topic: Ross’s CB750 project  (Read 3441 times)
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« on: January 14, 2023, 06:06:29 PM »
So I bought a ‘77 CB750.  Needs a lot more work ($) than I thought it would. 

Great turnaround from Partsnmore in Ontario.  Cheaper than other parts sites and on CDN dollars.  Ordered carb stuff Tuesday afternoon, got it this afternoon. 

Hopefully try to start it tomorrow.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Twisted_Twin
BCCMC Star (5K)
*******
Offline Offline

Posts: 6386


15/16ths of the world uses the metric system.
« Reply #1 on: January 14, 2023, 07:16:56 PM »
Bent Bike in Langley has a coffin tank for one of those...
Logged
It's important to feel comfortable in your own skin because it's illegal to wear someone else's.
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #2 on: January 14, 2023, 07:35:31 PM »
Quote from: Twisted_Twin on January 14, 2023, 07:16:56 PM
Bent Bike in Langley has a coffin tank for one of those...

Ya, gonna have to talk to them about side covers.  Both were cracked and or sorta repaired.  I dropped one on the garage floor yesterday and it kinda shattered.  Probably not repairable.  The only place I have found aftermarket side covers is Z1E.  Was really hoping not to have to buy any. 

Not spending/ordering anything until I start and see how it runs.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Runningdog
1000 Class
******
Offline Offline

Posts: 4892


In Dog Beers I've only had one.
« Reply #3 on: January 15, 2023, 08:16:07 AM »
Vintage 750 in Stratford, ON, is good for some parts, too.  https://www.vintagecb750.com

I found pattern side covers from 4into1 in California, mine were the same condition as yours.  A bit spendy (100 bucks), but fit well and looked good.

In general, parts prices have tripled or quadrupled in past couple of years, especially OEM, so be aware and beware.   I know, just what you wanted to hear.
« Last Edit: January 15, 2023, 08:18:03 AM by Runningdog » Logged
Past:  '82 Suzuki GS400E; '82 Suzuki GS750E; '81 Yamaha Virago 750; '82 Suzuki GS650GL; '77 Yamaha DT250; '80 GS 850; '86 Kawasaki ZG1000; '78 XS400; 1971 Motobecane Mobylette; 1980 Yamaha SR250; various parts/project bikes, 2004 ZRX 1200; 1977 CB750K; '73 Triumph TR5T (Vintage Plate) .
Present: ; '75 Honda XL250 (Collector Plate);  '04 Wee-Strom;  1973 Honda CB350 6-million Dollar Project;   1979 GS750E
Steve G.
1000 Class
******
Offline Offline

Posts: 4233
« Reply #4 on: January 15, 2023, 02:18:58 PM »


  Hi Ross,
  You need to modify your profile of garage residents.
Logged
Garage Residents:
'74 Honda CT70
'74 Norton 850 Interstate
'81 Laverda Jota Mk11 180
'89 Honda RC30
'91 BMW R100GS
'08 Honda XR650L
'08 BMW R1200GS

Previous Garage Residents
 1966 Keystone Tas 50
 1981 Can-Am 250 MX6
 1966 BSA 250 Starfire
 1976 Honda 400-4 Supersport
 1982 Can-Am 500 Sonic
 1984 Kawasaki KZ 750 L4
 1979 Honda CBX
 1988 Ducati 750 Paso 750 Euro
 1972 Suzuki 750 GT ‘Kettle’
 1972 Kawasaki 750 H2
 1993 BMW R100GSPD
 1984 Honda CR500
 1979 Honda CBX sandcast
 1975 Honda 400-4 SS
 2001 Moto Guzzi V11 Sport
 2006 Yamaha FJR 1300
1972 Norton Combat Roadster 810
 1972 BMW R75/2 SWB
 1980 Honda CBX
 1970 Honda Z50
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #5 on: January 15, 2023, 08:58:33 PM »
Quote from: Runningdog on January 15, 2023, 08:16:07 AM
Vintage 750 in Stratford, ON, is good for some parts, too.  https://www.vintagecb750.com

I found pattern side covers from 4into1 in California, mine were the same condition as yours.  A bit spendy (100 bucks), but fit well and looked good.

In general, parts prices have tripled or quadrupled in past couple of years, especially OEM, so be aware and beware.   I know, just what you wanted to hear.

I wonder if Vintage 750 and Partsnmore aren’t connected in some way.  Pretty much exact same stuff at exact same prices, and Partsnmore also is in Stratford.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Runningdog
1000 Class
******
Offline Offline

Posts: 4892


In Dog Beers I've only had one.
« Reply #6 on: January 16, 2023, 07:48:05 AM »
Quote from: Galactica on January 15, 2023, 08:58:33 PM
Quote from: Runningdog on January 15, 2023, 08:16:07 AM
Vintage 750 in Stratford, ON, is good for some parts, too.  https://www.vintagecb750.com

I found pattern side covers from 4into1 in California, mine were the same condition as yours.  A bit spendy (100 bucks), but fit well and looked good.

In general, parts prices have tripled or quadrupled in past couple of years, especially OEM, so be aware and beware.   I know, just what you wanted to hear.

I wonder if Vintage 750 and Partsnmore aren’t connected in some way.  Pretty much exact same stuff at exact same prices, and Partsnmore also is in Stratford.

Huh, you're right.
Logged
Past:  '82 Suzuki GS400E; '82 Suzuki GS750E; '81 Yamaha Virago 750; '82 Suzuki GS650GL; '77 Yamaha DT250; '80 GS 850; '86 Kawasaki ZG1000; '78 XS400; 1971 Motobecane Mobylette; 1980 Yamaha SR250; various parts/project bikes, 2004 ZRX 1200; 1977 CB750K; '73 Triumph TR5T (Vintage Plate) .
Present: ; '75 Honda XL250 (Collector Plate);  '04 Wee-Strom;  1973 Honda CB350 6-million Dollar Project;   1979 GS750E
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #7 on: January 16, 2023, 02:33:47 PM »
Well, I got the CB 750 carbs back together and reinstalled.  They're quite stiff though, so perhaps I've done something wrong.

Numbers 1 and 4 carb needles weren't seating and gas poured out of the overflow tubes.  Managed to get them working without removing the carbs from the bike.

 Took the battery out of the Yamaha.  After a few tries it fired briefly.  Ran the battery flat trying to start it again.

Batteries are getting expensive.  $113 at Edmonds Battery.  Not in stock until Wednesday.

 I'll charge the Yamaha battery and try again later.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #8 on: January 16, 2023, 02:35:23 PM »
Woo Hoo!  So I charged the Yamaha battery up again.  Bike fired, and with some coaxing actually ran!  Stalls on throttle tip in.  Not sure what to do about that.  Idles ok.  Stumbles at higher rpm.  All four cylinders firing.  No smoke!!  Charging system is working as normal.

Front brake is really squishy but getting better, hoping not to need master cylinder rebuild.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Steve G.
1000 Class
******
Offline Offline

Posts: 4233
« Reply #9 on: January 16, 2023, 04:21:37 PM »
Quote from: Galactica on January 16, 2023, 02:33:47 PM
Well, I got the CB 750 carbs back together and reinstalled.  They're quite stiff though, so perhaps I've done something wrong.

Numbers 1 and 4 carb needles weren't seating and gas poured out of the overflow tubes.  Managed to get them working without removing the carbs from the bike.

 Took the battery out of the Yamaha.  After a few tries it fired briefly.  Ran the battery flat trying to start it again.

Batteries are getting expensive.  $113 at Edmonds Battery.  Not in stock until Wednesday.

 I'll charge the Yamaha battery and try again later.

  Claim BMOC membership, instant deal.
Logged
Garage Residents:
'74 Honda CT70
'74 Norton 850 Interstate
'81 Laverda Jota Mk11 180
'89 Honda RC30
'91 BMW R100GS
'08 Honda XR650L
'08 BMW R1200GS

Previous Garage Residents
 1966 Keystone Tas 50
 1981 Can-Am 250 MX6
 1966 BSA 250 Starfire
 1976 Honda 400-4 Supersport
 1982 Can-Am 500 Sonic
 1984 Kawasaki KZ 750 L4
 1979 Honda CBX
 1988 Ducati 750 Paso 750 Euro
 1972 Suzuki 750 GT ‘Kettle’
 1972 Kawasaki 750 H2
 1993 BMW R100GSPD
 1984 Honda CR500
 1979 Honda CBX sandcast
 1975 Honda 400-4 SS
 2001 Moto Guzzi V11 Sport
 2006 Yamaha FJR 1300
1972 Norton Combat Roadster 810
 1972 BMW R75/2 SWB
 1980 Honda CBX
 1970 Honda Z50
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #10 on: January 16, 2023, 04:36:07 PM »


  Claim BMOC membership, instant deal.
[/quote]

That price is with a discount.
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
magpie
Super Member
*****
Offline Offline

Posts: 628
« Reply #11 on: January 17, 2023, 10:01:53 AM »
Try Fortnine for a battery. And other parts.
I get great service from this company.
https://fortnine.ca/en/parts-unlimited-agm-battery
Cliff.
Logged
I
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #12 on: January 17, 2023, 03:03:19 PM »
Quote from: magpie on January 17, 2023, 10:01:53 AM
Try Fortnine for a battery. And other parts.
I get great service from this company.
https://fortnine.ca/en/parts-unlimited-agm-battery
Cliff.

Thanks Cliff.  I had a look at Fortnine (I’ve had good service from them as well), none of their batteries had a “fit”. 
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
Galactica
1000 Class
******
Offline Offline

Posts: 4429
« Reply #13 on: January 17, 2023, 03:11:04 PM »
I have the bike running now.  Have run it on and off for about 45 minutes hoping the gasoline would get rid of any remaining varnish. 

Bike starts and runs well once warm.  Boggs and stalls with quick throttle tip in off idle.  Accelerator pump?  Off idle it revs well for the most part. 

I did a careful bench sync, so it should be close.  Borrowing a carb balancer and digital tach tomorrow.  I e never been very good at idle mixture screw adjustment. 

Can’t get the brakes to pump up. 
Logged
Past rides:
75 Honda CB750K5
80 Suzuki TS250
 ? Yamaha Maxim 550
73 Z1 900
76 Kz900 A1
77 Kz1000 A1
78 Kz1000 B2 Ltd
79 Kz1000 B3 Ltd
80 Kz1000 C
99 Triumph Tiger 900
84 Honda VF750 Interceptor
77 Honda CB750


Current ride:
2019 Yamaha Tracer900

Current project:
1975 Honda CB750K5
rz5mark
1000 Class
******
Offline Offline

Posts: 1812
« Reply #14 on: January 17, 2023, 06:39:01 PM »
pilot jets partially plugged?
Logged
Pages: [1] 2 3 4 5 6 Go Up Print 
« previous next »
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Valid XHTML 1.0! Valid CSS!