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CB77 ignition advance

Points Based Ignition | Electronic Ignition Upgrade
Nonmilagno
honda305.com Member
Posts: 4
Joined: Sun Aug 18, 2019 1:43 pm
Location: Jacksonville, Oregon

CB77 ignition advance

Post by Nonmilagno » Sun Mar 15, 2020 7:12 pm

First post here, great site.

Installed new ignition advance springs on my CB77 (CB77E 10441xx). I think they may be the wrong ones. Can anyone give dimensions of CB vs. CA springs?

Thanks.
Retired Aircraft Mechanic

LOUD MOUSE
honda305.com Member
Posts: 7813
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Re: CB77 ignition advance

Post by LOUD MOUSE » Mon Mar 16, 2020 7:03 am

There are 2 sizes of springs.
The longer ones are for the DREAM engines. .....................lm

Nonmilagno
honda305.com Member
Posts: 4
Joined: Sun Aug 18, 2019 1:43 pm
Location: Jacksonville, Oregon

Re: CB77 ignition advance

Post by Nonmilagno » Mon Mar 16, 2020 10:20 am

Thanks for the reply. The springs I have are a little under 1” (.970” to .990”) Are these CA springs or CB?
Retired Aircraft Mechanic

LOUD MOUSE
honda305.com Member
Posts: 7813
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Re: CB77 ignition advance

Post by LOUD MOUSE » Tue Mar 17, 2020 8:59 am

I'll get back after my DR. visit. ...................lm

Nonmilagno
honda305.com Member
Posts: 4
Joined: Sun Aug 18, 2019 1:43 pm
Location: Jacksonville, Oregon

Re: CB77 ignition advance

Post by Nonmilagno » Tue Mar 17, 2020 9:35 am

Thanks, I appreciate the effort.
Retired Aircraft Mechanic

Tim Miller
honda305.com Member
Posts: 242
Joined: Mon Jan 30, 2012 6:22 pm
Location: Pflugerville, TX

Re: CB77 ignition advance

Post by Tim Miller » Tue Mar 17, 2020 2:49 pm

Correct spring is .970”ish but the CB/CL wire diameter is.040” vs. CA is .031.
If your spring are loose? Then the problem is the advancer stops are collapsed. I rebuilt these on every rebuild by machining large 10mm bushing that slide over the stock 8mm stops. This will allow much better throttle response by having 8-12 degrees of initial advance at idle and around 40- 42 on total advance above 3000 rpm.

If you need help with modification let me know.
Tim

Nonmilagno
honda305.com Member
Posts: 4
Joined: Sun Aug 18, 2019 1:43 pm
Location: Jacksonville, Oregon

Re: CB77 ignition advance

Post by Nonmilagno » Wed Mar 18, 2020 3:14 pm

PM sent.
Retired Aircraft Mechanic

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