my gs450 problem

[Guest]

i messed my head up on my 83 gs450t so i order a another one of ebay with the cams and caps but when i put it in time the engine will rotate about 3/4 of the way and stops and it wont move but the valves are free and i don't see any interference marks on the head or the pistons some help would be great appreciated

[gsrick]

i messed my head up on my 83 gs450t so i order a another one of ebay with the cams and caps but when i put it in time the engine will rotate about 3/4 of the way and stops and it wont move but the valves are free and i don't see any interference marks on the head or the pistons some help would be great appreciated

We need some more info. How did you mess up your other head? If all you did was remove the head then something(a valve) has to be hitting a piston. Is the replacement head and cams stock and are you sure the cams are timed right to the crank?

[possumshole]

yes the timing is right and the cams are stock i put the crank on the mark after the r t then set the cams so their 18 pens between 2 and 3 could the valve shims be wrong or could i have the wrong head

[possumshole]

i think the head i"m trying to use is off a 80 model gs450 and my is a 83 gs450t but i wouldn't think this would cause a interference problem

[hillsy]

The different head should work fine but maybe the cam markings are different?

Unless the camchain is locked up at the crank it can only be incorrectly timed cams.......or you left a socket in the cylinder....

[possumshole]

thanks for the help i changed the cams and it worked now i can go back together