I am not trying to sell you on this as the problem, but worthwhile to check since continued operation with a cat problem literally will taost your wallet with high risk of additional expensive added problems. Gorgo - Cats can have a dramatic short term failure when the inside element collapses. Engine MUST be turned counterclockwise on that side (left).Whatever Dogger, different strokes for different folks. Two TDCs happen then, one at the end of exhaust stroke and beginning of intake, and the other at end of compression and beginning of power.Įasiest way is to yank #1 plug and with finger over the hole turn the engine over until you feel the compression beginning to push your finger off, the next TDC (1.4 S.F) you roll to will be the correct one if you don't go too far.
There are TWO, a 4 stroke has to rotate TWO complete revolutions (720 degrees total) to finish an entire cycle, why it's called a 4 stroke.2 strokes up and 2 down.intake, compression, power stroke and exhaust, in that order. "When the 1.4 S.F mark is on you are at TDC.BUT, WHICH ONE? Could someone confirm if this advice is correct? Perhaps I set the cam timing marks to top dead center but it was on the exhaust stroke. I saw the following in another thread and I think that it could solve the problem. So I have to believe that I don't have it timed properly. Even if a valve or two is bent I believe it should have fired. I know I have spark and today I sprayed starter fluid into the holes going into the head on the back side of the carburetor. My question is, is there a way to confirm my suspicion without doing major tear down? Is there an easy (relatively) way to reset the timing? Could I loosen the tension and get the chain off to allow me to turn the sprockets so they can be set at the correct timing marks? Perhaps there was wear on the sprockets or a broken tooth. To me, this suggests that the cam timing is off badly and that suggests that the chain somehow slipped but did not break. However when I put my hand over the number one (left as I sit on it) cylinder, it did not feel like it was sucking and it actually was puffing air out fairly strongly. Everything looked fine when I cranked it.
I removed the valve cover to try to confirm if the chain broke and it did not, and seemed to have good tightness. It made a hint of trying to fire perhaps on only one of the four cylinders. The engine would crank and seemed to have similar compression as before. (I have only moderate repairing skills and limited tools) I was riding my 1979 CB750F when it suddenly shut down with some rattling noise toward the front of the engine indicating what I thought was a broken timing chain.
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