I can't seem to get the valves adjust to even a 0.0015, no matter which direction I turn the adjustment screw. What am I doing wrong? Oh I do aline the timing marks and the LT, then turn the crank 180 degrees clockwise. Anything missing?
Valve adjustments again
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Re: Value adjustments again
Yes...Why are you turning the crankshaft 180 degrees clockwise?
Set the crank to LT on the compression stroke (left intake valve should have closed a bit before you reach the index)... Hold the crank there and adjust both the left valves.
Now, turn the crank 180 counterclockwise to the T mark... Hold it there and adjust both right valves......
Yes...Why are you turning the crankshaft 180 degrees clockwise?
Set the crank to LT on the compression stroke (left intake valve should have closed a bit before you reach the index)... Hold the crank there and adjust both the left valves.
Now, turn the crank 180 counterclockwise to the T mark... Hold it there and adjust both right valves......
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Re: Value adjustments again
The only marks to line up are the alternator mark and it's index.
Like Steve says, you gotta' be on compression stroke, and don't turn the alternator clockwise.
And set the valves to 0.002", not 0.0012".
Sounds like you're looking at the Clymer manual - no wonder you're confused.
I trust Steve more than any bloody book too.petewag said:
The only marks to line up are the alternator mark and it's index.
Like Steve says, you gotta' be on compression stroke, and don't turn the alternator clockwise.
And set the valves to 0.002", not 0.0012".
Sounds like you're looking at the Clymer manual - no wonder you're confused.
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Re: Value adjustments again
Yes, when ALL the marks (LT and its index, and the cam journal lines and cam marks) line up the left piston is at A top dead center point... BUT, there are TWO such points in the engines four stroke cycle for each cylinder.... You HAVE to be on the one that is the COMPRESSION STROKE for the cylinder you are adjusting the valves on....
Watch the intake valve for the left cylinder ..... As soon as it fully closes, the very next time the "LT" line on the rotor aligns with the index, the engine is at TDC on the compression stroke for the LEFT cylinder
Yes, when ALL the marks (LT and its index, and the cam journal lines and cam marks) line up the left piston is at A top dead center point... BUT, there are TWO such points in the engines four stroke cycle for each cylinder.... You HAVE to be on the one that is the COMPRESSION STROKE for the cylinder you are adjusting the valves on....
Watch the intake valve for the left cylinder ..... As soon as it fully closes, the very next time the "LT" line on the rotor aligns with the index, the engine is at TDC on the compression stroke for the LEFT cylinder
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To be precise, the marks on the cams and journals actually line up at the top of the exhaust stroke, not compression stroke.
Honda did this, I think, to make it possible for one guy to do the cam timing - if it were done on compression stroke, the tendency of a 450 (or 350) to "run by" the LT mark when you rotate the alternator would cause the need for extra hands or some sort of tool to hold the alternator.
So it's (the cam timing, not ignition timing) done on the "off stroke" to reduce the run by tendency.
Honda did this, I think, to make it possible for one guy to do the cam timing - if it were done on compression stroke, the tendency of a 450 (or 350) to "run by" the LT mark when you rotate the alternator would cause the need for extra hands or some sort of tool to hold the alternator.
So it's (the cam timing, not ignition timing) done on the "off stroke" to reduce the run by tendency.
This one of the locations where it states to line up the marks and then turn the crank ccw 360
http://www.cb450stuff.com/manual/index.htm#Valve
http://www.cb450stuff.com/manual/index.htm#Valve
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Yep...It IS confusing....That is a TDC point, (exhaust stroke) and you need to go 360 to get it to TDC on the COMPRESSION stroke..... If you use the intake valve as your guide, you WILL ALREADY be on the compression stroke, so the "extra 360" is unnecessary.... Set left valves, and then go 180 CCW to set right valves
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