Just adjusted the tappets on an 86 JDM spec 750 but have found that the procedure in the manual (see pics) doesn’t quite work.
When it says adjust number 1 for example, the cam slots are facing outwards and the “T” aligned on the rotor as per the manual, both cam lobes are pointing out towards the outside of the casing. If I rotate the crank I find that the gap is bigger on the exhaust when the cam lobe is pointing up, hence adjusting it when directed would mean the clearance is tight..?
This is also true for number 3 exhaust - the cam is up when it suggests adjusting it, but the gap gets bigger when it’s facing the outer casing, and 4 exhaust it says adjust when facing the casing but the gap is bigger when the cam is facing up.
This is only true of exhausts 1, 3, and 4, number 2 is basically the same gap forward and up. I tried this 3 or 4 times as I wondered if I was going mad. The cam is worn, you can see ware on the lobes but I’ve decided to run it and sort it out later.
Has anyone else found this, does this point to wear on the cam, journal or head..?
Help...
When it says adjust number 1 for example, the cam slots are facing outwards and the “T” aligned on the rotor as per the manual, both cam lobes are pointing out towards the outside of the casing. If I rotate the crank I find that the gap is bigger on the exhaust when the cam lobe is pointing up, hence adjusting it when directed would mean the clearance is tight..?
This is also true for number 3 exhaust - the cam is up when it suggests adjusting it, but the gap gets bigger when it’s facing the outer casing, and 4 exhaust it says adjust when facing the casing but the gap is bigger when the cam is facing up.
This is only true of exhausts 1, 3, and 4, number 2 is basically the same gap forward and up. I tried this 3 or 4 times as I wondered if I was going mad. The cam is worn, you can see ware on the lobes but I’ve decided to run it and sort it out later.
Has anyone else found this, does this point to wear on the cam, journal or head..?
Help...