CB650SC/New Owner Suggestions - Revision history

WikiSysop at 20:17, 30 June 2026

2026-06-30T20:17:22Z

← Older revision		Revision as of 20:17, 30 June 2026
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	==Should replace==		==Engine==
	===O-rings===		===Should replace===
			====O-rings====
	Avoid fuel leakage:		Avoid fuel leakage:
	* Carb "Fuel-Tee" x2		* Carb "Fuel-Tee" x2
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	* Oil filter cover x1 (sometimes comes with new filter, can be reused carefully)		* Oil filter cover x1 (sometimes comes with new filter, can be reused carefully)

	==Must clean/rebuild==		===Must clean/rebuild===
	===Carburetors===		====Carburetors====
	* Check and replace with same jets & emulsion tube or clean, check, and reuse (order individually by size, no kits)		* Check and replace with same jets & emulsion tube or clean, check, and reuse (order individually by size, no kits)
	* Reuse main-jet needle (do not trust "kits")		* Reuse main-jet needle (do not trust "kits")
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	*** Red thread locker will be a huge mistake		*** Red thread locker will be a huge mistake

	===Hydraulic Tappets===		====Hydraulic Tappets====
	* Follow manual for removal		* Follow manual for removal
	* Use allen key (my recommendation), smooth bore side of 1/16 drill bit (Clymer manual), or special tool Honda 07973-ME9-0000 to bleed out oil		* Use allen key (my recommendation), smooth bore side of 1/16 drill bit (Clymer manual), or special tool Honda 07973-ME9-0000 to bleed out oil
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	==Hydraulic control systems==		==Hydraulic control systems==
	===Brakes===		===Brakes===
			* Brake callipers will corrode and seize in place, essentially locking the wheel if left unmaintained
			** soaking in PB Blaster for days and 100psi from the air compressor may be necessary to dislodge the pistons
			** soaking in PB Blaster and wailing upon with a punch and 1/2lb hammer may be necessary to remove the retaining pins
	===Clutch===		===Clutch===

WikiSysop: /* Carburetors */

2026-06-30T20:08:20Z

Carburetors

← Older revision		Revision as of 20:08, 30 June 2026
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	* It goes without saying, vacuum-balance the carbs		* It goes without saying, vacuum-balance the carbs
	** Nothing beats digital gauges for speed, ease of use, or accuracy.		** Nothing beats digital gauges for speed, ease of use, or accuracy.
			* If you don't have and can't get "EPA"/back-out lock caps for the mixture screws, they -will- back out and lead to fouled plugs
			** 3D printed replacements do exist and can be thread locked on just like the originals
			** In desperate situations a spot of white, high-temperature, fuel-safe <b>thread sealer</b> can be used to secure the screw <b>AFTER</b> reading the spark plugs to confirm the tune
			*** Blue thread locker will loosen from engine heat even if the carbs are cold
			*** Red thread locker will be a huge mistake

	===Hydraulic Tappets===		===Hydraulic Tappets===

WikiSysop: /* O-rings */

2026-06-30T19:58:51Z

O-rings

← Older revision		Revision as of 19:58, 30 June 2026
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	===O-rings===		===O-rings===
	Avoid fuel leakage:		Avoid fuel leakage:
	* Carb "Tee" x2		* Carb "Fuel-Tee" x2
	* Carb bowl x4		* Carb bowl seal x4
	* Carb ~~flow~~ tubes & ~~vent~~ "Tees" x8(x4+x4)		* Carb fuel tubes & "Vent-Tees" x8(x2+x2+x2+2)

	Avoid Air leakage(leads to lean):		Avoid Air leakage(leads to lean):
	* Carb-head x8		* Carb-to-insulator-to-head x8(x2+x2+x2+2)

	Avoid low head/cam/tappet lubrication:		Avoid low head/cam/tappet lubrication/<b>valve tick</b>:
	* Valve-train oil pipe x10(x2+x8)		* Valve-train oil pipe x10(x2+x8)

WikiSysop: /* Hydraulic Tappets */

2026-06-30T19:53:10Z

Hydraulic Tappets

← Older revision		Revision as of 19:53, 30 June 2026
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	* bleed out the solvent from the last step		* bleed out the solvent from the last step
	* bleed under engine oil until primed (pressing on the tappet without the "bleeder pin" inserted should feel like it is basically completely solid		* bleed under engine oil until primed (pressing on the tappet without the "bleeder pin" inserted should feel like it is basically completely solid
	* Keep upright and install with the tappet lower hole toward the (toward spark-plugs) squirter?		* Keep upright and install with the tappet lower hole toward the centre (toward spark-plugs) squirter hole

	==Hydraulic control systems==		==Hydraulic control systems==
	===Brakes===		===Brakes===
	===Clutch===		===Clutch===

WikiSysop: /* Carburetors */

2026-06-30T19:51:28Z

Carburetors

← Older revision		Revision as of 19:51, 30 June 2026
Line 21:		Line 21:
	* Reuse main-jet needle (do not trust "kits")		* Reuse main-jet needle (do not trust "kits")
	* If a po crushed the mixture screw seats, tuning will go from 2-3 turns out to something like 1/4-3/4 of a turn out		* If a po crushed the mixture screw seats, tuning will go from 2-3 turns out to something like 1/4-3/4 of a turn out
	** The hole that the very tip of the mixture screw "needle" goes into should have a narrow, raised "lip" surrounding it. If you look down the mixture screw hole, and see a "pin-hole" that is flush to the base or has "starred" out metal around it that looks like a pressed rivet, the ~~screw~~ seat is crushed and destroyed.		** The hole that the very tip of the mixture screw "needle" goes into should have a narrow, raised "lip" surrounding it. If you look down the mixture screw hole, and see a "pin-hole" that is flush to the base or has "starred" out metal around it that looks like a pressed rivet, the mixture seat is crushed and destroyed.
	* It goes without saying, vacuum-balance the carbs		* It goes without saying, vacuum-balance the carbs
	** Nothing beats digital gauges for speed, ease of use, or accuracy.		** Nothing beats digital gauges for speed, ease of use, or accuracy.

WikiSysop: /* Carburetors */

2026-06-30T19:50:47Z

Carburetors

← Older revision		Revision as of 19:50, 30 June 2026
Line 21:		Line 21:
	* Reuse main-jet needle (do not trust "kits")		* Reuse main-jet needle (do not trust "kits")
	* If a po crushed the mixture screw seats, tuning will go from 2-3 turns out to something like 1/4-3/4 of a turn out		* If a po crushed the mixture screw seats, tuning will go from 2-3 turns out to something like 1/4-3/4 of a turn out
	** The hole that the very tip of the mixture screw "needle" goes into should have a narrow, raised "lip" surrounding it. If you look down the mixture screw hole, and see a "pin-hole" that is flush to the base or has "~~started~~" out metal around it that looks like a pressed rivet, the screw seat is crushed and destroyed.		** The hole that the very tip of the mixture screw "needle" goes into should have a narrow, raised "lip" surrounding it. If you look down the mixture screw hole, and see a "pin-hole" that is flush to the base or has "starred" out metal around it that looks like a pressed rivet, the screw seat is crushed and destroyed.
	* It goes without saying, vacuum-balance the carbs		* It goes without saying, vacuum-balance the carbs
	** Nothing beats digital gauges for speed, ease of use, or accuracy.		** Nothing beats digital gauges for speed, ease of use, or accuracy.

WikiSysop: /* Hydraulic Tappets */

2026-06-30T19:48:18Z

Hydraulic Tappets

← Older revision		Revision as of 19:48, 30 June 2026
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	* again bleed upright under kerosene (mineral spirits or maybe even diesel fuel in a pinch?) to clean		* again bleed upright under kerosene (mineral spirits or maybe even diesel fuel in a pinch?) to clean
	* bleed out the solvent from the last step		* bleed out the solvent from the last step
	* bleed under engine oil until primed (~~pushing~~ on the ~~taper~~ without the "bleeder pin" should feel like it is basically completely solid		* bleed under engine oil until primed (pressing on the tappet without the "bleeder pin" inserted should feel like it is basically completely solid
	* ~~keep~~ upright and install with the tappet lower hole toward the (toward spark-plugs) squirter?		* Keep upright and install with the tappet lower hole toward the (toward spark-plugs) squirter?

	==Hydraulic control systems==		==Hydraulic control systems==
	===Brakes===		===Brakes===
	===Clutch===		===Clutch===

WikiSysop: /* Carburetors */

2026-06-30T19:46:54Z

Carburetors

← Older revision		Revision as of 19:46, 30 June 2026
Line 18:		Line 18:
	==Must clean/rebuild==		==Must clean/rebuild==
	===Carburetors===		===Carburetors===
	* Check and replace with same jets & emulsion tube or reuse (order individually by size, no kits)		* Check and replace with same jets & emulsion tube or clean, check, and reuse (order individually by size, no kits)
	* Reuse needle (do not trust "kits")		* Reuse main-jet needle (do not trust "kits")
			* If a po crushed the mixture screw seats, tuning will go from 2-3 turns out to something like 1/4-3/4 of a turn out
			** The hole that the very tip of the mixture screw "needle" goes into should have a narrow, raised "lip" surrounding it. If you look down the mixture screw hole, and see a "pin-hole" that is flush to the base or has "started" out metal around it that looks like a pressed rivet, the screw seat is crushed and destroyed.
			* It goes without saying, vacuum-balance the carbs
			** Nothing beats digital gauges for speed, ease of use, or accuracy.

	===Hydraulic Tappets===		===Hydraulic Tappets===

WikiSysop at 16:58, 22 June 2026

2026-06-22T16:58:42Z

← Older revision		Revision as of 16:58, 22 June 2026
Line 16:		Line 16:
	* Oil filter cover x1 (sometimes comes with new filter, can be reused carefully)		* Oil filter cover x1 (sometimes comes with new filter, can be reused carefully)

	===Must clean/rebuild===		==Must clean/rebuild==
	==Carburetors==		===Carburetors===
	* Check and replace with same jets & emulsion tube or reuse (order individually by size, no kits)		* Check and replace with same jets & emulsion tube or reuse (order individually by size, no kits)
	* Reuse needle (do not trust "kits")		* Reuse needle (do not trust "kits")

	==Hydraulic Tappets==		===Hydraulic Tappets===
	* Follow manual for removal		* Follow manual for removal
	* Use allen key (my recommendation), smooth bore side of 1/16 drill bit (Clymer manual), or special tool Honda 07973-ME9-0000 to bleed out oil		* Use allen key (my recommendation), smooth bore side of 1/16 drill bit (Clymer manual), or special tool Honda 07973-ME9-0000 to bleed out oil

WikiSysop: /* O-rings */

2026-06-22T16:57:08Z

O-rings

← Older revision		Revision as of 16:57, 22 June 2026
Line 3:		Line 3:
	Avoid fuel leakage:		Avoid fuel leakage:
	* Carb "Tee" x2		* Carb "Tee" x2
	* Carb bowl x1		* Carb bowl x4
	* Carb flow tubes & vent "Tees" x8		* Carb flow tubes & vent "Tees" x8(x4+x4)

	Avoid Air leakage(leads to lean):		Avoid Air leakage(leads to lean):
Line 10:		Line 10:

	Avoid low head/cam/tappet lubrication:		Avoid low head/cam/tappet lubrication:
	* Valve-train oil pipe x2 & x8		* Valve-train oil pipe x10(x2+x8)

	Avoid low oil pressure/dirty oil contamination?:		Avoid low oil pressure/dirty oil contamination?:
	* Oil filter tube x4?		* Oil filter tube x3?
			* Oil filter cover x1 (sometimes comes with new filter, can be reused carefully)

	===Must clean/rebuild===		===Must clean/rebuild===