Ross’s CB750 project

[Galactica]

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.

[Twisted_Twin]

Bent Bike in Langley has a coffin tank for one of those...

[Galactica]

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.

[Runningdog]

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.

[Steve G.]

  Hi Ross,
  You need to modify your profile of garage residents.

[Galactica]

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.

[Runningdog]

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.

[Galactica]

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.

[Galactica]

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.

[Steve G.]

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.

[Galactica]

  Claim BMOC membership, instant deal.
[/quote]

That price is with a discount.

[magpie]

Try Fortnine for a battery. And other parts.
I get great service from this company.
https://fortnine.ca/en/parts-unlimited-agm-battery
Cliff.

[Galactica]

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”. 

[Galactica]

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. 

[rz5mark]

pilot jets partially plugged?