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Squealing noise around stator and slow return to idles

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Brickyard
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Posts: 135
Joined: Tue Mar 26, 2013 6:49 pm
Location: North Florida

Post by Brickyard » Mon Nov 09, 2015 4:33 pm

Helicoil for the stripped case threaded hole went in just fine, and it gives me peace of mind knowing these steel threads are just as strong or stronger than the original threads.

Now its time to seal the cases back up!
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LOUD MOUSE
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Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Mon Nov 09, 2015 4:39 pm

That's what I wondered about.
I recommend you compare the original against your feeler and see what was there with it. ................lm
Brickyard wrote:Used a feeler gauge I bought from Honda way back when, though, those specific gauges have never been used, so they arent worn down or anything.
LOUD MOUSE wrote:Thank you.
What did you use?. ......lm

Brickyard
honda305.com Member
Posts: 135
Joined: Tue Mar 26, 2013 6:49 pm
Location: North Florida

Post by Brickyard » Mon Nov 09, 2015 4:43 pm

The original top and second ring were both .026 in or .65mm, as measured yesterday afternoon in the same manner and with the same cylinder. With the old set up, I didn't experience anything out of the ordinary from a 50 year old bike.
LOUD MOUSE wrote:That's what I wondered about.
I recommend you compare the original against your feeler and see what was there with it. ................lm

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Mon Nov 09, 2015 4:57 pm

OK.
I'll recommend you go with what TIM sold you as for the rings.
Question.
How do the new pistons MIC at the top and bottom?. ...............lm

Brickyard wrote:The original top and second ring were both .026 in or .65mm, as measured yesterday afternoon in the same manner and with the same cylinder. With the old set up, I didn't experience anything out of the ordinary from a 50 year old bike.
LOUD MOUSE wrote:That's what I wondered about.
I recommend you compare the original against your feeler and see what was there with it. ................lm

Brickyard
honda305.com Member
Posts: 135
Joined: Tue Mar 26, 2013 6:49 pm
Location: North Florida

Post by Brickyard » Mon Nov 09, 2015 5:07 pm

Ok, if im reading correctly, and after sitting down in front of the Honda repair manual, my notes, a pen, and no beverage, I've done some learnings:

According to Honda, my CB77 with a standard bore top ring should have a maximum .4mm ring gap with a repairing limit of .65mm. .4 + .65= 1.05mm gap before I have to replace. My top rings are .60mm and .65mm, so Im good.

According to Honda, my CB77 with a standard bore second ring should have a maximum .4mm ring gap with a repairing limit of .65mm. .4 + .65= 1.05mm gap before I have to replace. My second rings are .65mm and .65mm, so Im good again.

According to Honda, my CB77 with a standard bore oil rings should have a maximum .4mm ring gap with a repairing limit of .8mm. .3 + .8= 1.10mm gap before I have to replace. My oil rings are .65mm and .70mm so Im good again'er.

BAM!!!!

Mind....

Blown....

Please correct me if I've misinterpreted the ancient Honda scrolls.
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Brickyard
honda305.com Member
Posts: 135
Joined: Tue Mar 26, 2013 6:49 pm
Location: North Florida

Post by Brickyard » Mon Nov 09, 2015 5:12 pm

I'm a Sailor, and we use ALOT of acronyms, but I never heard of MIC. (measure in comparison???)
LOUD MOUSE wrote:OK.
I'll recommend you go with what TIM sold you as for the rings.
Question.
How do the new pistons MIC at the top and bottom?. ...............lm

Brickyard wrote:The original top and second ring were both .026 in or .65mm, as measured yesterday afternoon in the same manner and with the same cylinder. With the old set up, I didn't experience anything out of the ordinary from a 50 year old bike.
LOUD MOUSE wrote:That's what I wondered about.
I recommend you compare the original against your feeler and see what was there with it. ................lm

LOUD MOUSE
honda305.com Member
Posts: 7817
Joined: Mon Aug 15, 2005 8:23 am
Location: KERRVILLE, TEXAS

Post by LOUD MOUSE » Mon Nov 09, 2015 5:16 pm

Micrometer. .....................lm

Brickyard wrote:I'm a Sailor, and we use ALOT of acronyms, but I never heard of MIC. (measure in comparison???)
LOUD MOUSE wrote:OK.
I'll recommend you go with what TIM sold you as for the rings.
Question.
How do the new pistons MIC at the top and bottom?. ...............lm

Brickyard wrote:The original top and second ring were both .026 in or .65mm, as measured yesterday afternoon in the same manner and with the same cylinder. With the old set up, I didn't experience anything out of the ordinary from a 50 year old bike.
LOUD MOUSE wrote:That's what I wondered about.
I recommend you compare the original against your feeler and see what was there with it. ................lm

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