mmiller
CB750 New member
All spring on my rough idling, popping, grumbling 1977 CB750 I have (in this order):
1. Rebuilt the carbs (they badly needed it--new boots and top dust covers)
-followed the Hack A Week video - thanks Dino
2. Tested the float level
3. Synchronized the carbs
4. Cut plug wires back 3/8''
5. Cleaned up the spark plugs (All firing blue)
-tried new ones in every cyclinder (no change)
6. Gapped and polished the points
7. Put the motor to ATDC and did a "Cam chain adjustment"
8. Synchronized the carbs again - - idling fine at 1300 to 1400
So finally, I ordered a Compression Test Kit -- manual says, "must be above 150psi or within 10% of each other"
8. Compression Test:
Dry 1-110psi 2-105psi 3-100psi 4-100psi
Wet 1-140psi 2-135psi 3-135psi 4-140psi
My DAAAAD says ride it like I stole it...I think I've witnessed him being wrong too often...I just want my baby to run like it should. It has for the past four years!?
I want to know what you all think, should I rebuild it?
1. Rebuilt the carbs (they badly needed it--new boots and top dust covers)
-followed the Hack A Week video - thanks Dino
2. Tested the float level
3. Synchronized the carbs
4. Cut plug wires back 3/8''
5. Cleaned up the spark plugs (All firing blue)
-tried new ones in every cyclinder (no change)
6. Gapped and polished the points
7. Put the motor to ATDC and did a "Cam chain adjustment"
8. Synchronized the carbs again - - idling fine at 1300 to 1400
So finally, I ordered a Compression Test Kit -- manual says, "must be above 150psi or within 10% of each other"
8. Compression Test:
Dry 1-110psi 2-105psi 3-100psi 4-100psi
Wet 1-140psi 2-135psi 3-135psi 4-140psi
My DAAAAD says ride it like I stole it...I think I've witnessed him being wrong too often...I just want my baby to run like it should. It has for the past four years!?
I want to know what you all think, should I rebuild it?