EMira
XS650 Enthusiast
Although t I’m not sure the cam pin on the advance side is at TRUE 6 oclockNew photo at TDC as described. It’s 6
Although t I’m not sure the cam pin on the advance side is at TRUE 6 oclockNew photo at TDC as described. It’s 6
So long as its within about 5° or so, it's good enough.Although t I’m not sure the cam pin on the advance side is at TRUE 6 oclock
No. IF your cam is 180° out, that means it's 360° out at the crankshaft. Since this is a 360° parallel twin that fires a cylinder every 360°... your cylinders will fire correctly.... even if opposite of what they're supposed to..... they'll still work correctly.So the cam being 180 out would explain why my timing light fires my timing mark straight up?
I don't have an answer for you. IF everything your telling us is correct, and I believe it is, your problem is with the Mikes ignition system. You can do some research here on the forum on that iggy... but I've never messed with it, so I don't really have any answers for you... sorry.How would i resolved my crank from being 180 out? I’d love to be able to properly use my time marks for ignition tuning
How would i resolved my crank from being 180 out? I’d love to be able to properly use my time marks for ignition tuning
No points. What is 180 out is my cam shaft. Flipping the rod in 180* won’t change where my timing light in firing my mark atYou can put the rod in 180* out and everything works fine it just changes the firing order of the points to the opposite side.
Pull the motor and flip the cam? Are you saying that will put my timing mark where it needs to bePull motor apart.
But like Jim has clarified for you, crank doesn’t seem to be out.
Correct.No points. What is 180 out is my cam shaft. Flipping the rod in 180* won’t change where my timing light in firing my mark at
Thanks for the break down. Im Going to look into the ignitions side of thingsCorrect.
Just a quick run through on the four stoke cycle engine.
There's 720° of total crankshaft rotation per cycle and 360° of camshaft rotation.
So lets start at 0° The piston is at TDC and both valves are closed.
The piston moves down to BDC... that's 180° of crankshaft rotation. The camshaft has rotated 90° This is the power stroke.
At the bottom of the power stroke the exhaust valve starts to open.
The piston moves up to TDC... 360° of rotation... one full circle. The exhaust valve is closing and the intake starts to open. This is
"Valve overlap." The camshaft has completed 180° of rotation. this completes the exhaust stroke and starts the intake stroke.
The piston goes down to BDC and the intake valve is closing, completing to intake stroke. The crankshaft has completed 540° of rotation and the crankshaft 270°
The piston now moves up. this is the compression stroke. Just slightly prior to reaching TDC the ignition fires and the fuel/air mixture ignites
At TDC the piston starts moving down on the power stroke. At this point the crankshaft has rotated 720° (two complete circles) and the cam has completed one 360° circle. This completes one cycle of a 4 stroke/cycle engine... one complete rotation of the cam and two complete rotations of the crankshaft.
Never hurts to refresh your mind on how this engine works..
Being a 360° parallel twin one cylinder operates 360° opposite the other.
Boyer Bransden makes an excellent system that I use on my 1974. Please know that this system will not work on a re-phased engine. I believe Hugh’s Hand Built also makes an ignition system.Depends on what you mean by 180° out.
180° measured at the camshaft is OK because like you said, it's a wasted spark.
If you mean 180° at the crankshaft, that would put the pistons at BDC when it fires.
Do a site search for Xcharge ignition and you'll find most folk consider 'em junk. Worse than junk actually....
Good to hear,Well i flipped the rotor and it fired,