How many timing marks should I use on my yz450?
Only the actual timing marks should be used. The pin count for all YZ450’s using OEM cams is 13, as it is for MOST 426’s. 400’s I’m not sure about, and 250F’s are 12. If you have a 426 with an OEM YZ450 cam in it, you have to time the intake first and use 14 pins to time the exhaust.
Do you use 14 pins for yz450 Cam?
If you have a 426 with an OEM YZ450 cam in it, you have to time the intake first and use 14 pins to time the exhaust. See why you find so many “answers” to that question?
When to place the intake cam on a YZ 450?
Place one at 9:00 o’clock, aligned with the gasket surface on top of the head, and the other at 12:00. Be sure that the slack is gone from the cam chain running down from the front of the cam to the crank when you check, and that the crank hasn’t moved. Now, the intake cam.
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Only the actual timing marks should be used. The pin count for all YZ450’s using OEM cams is 13, as it is for MOST 426’s. 400’s I’m not sure about, and 250F’s are 12. If you have a 426 with an OEM YZ450 cam in it, you have to time the intake first and use 14 pins to time the exhaust.
If you have a 426 with an OEM YZ450 cam in it, you have to time the intake first and use 14 pins to time the exhaust. See why you find so many “answers” to that question?
Place one at 9:00 o’clock, aligned with the gasket surface on top of the head, and the other at 12:00. Be sure that the slack is gone from the cam chain running down from the front of the cam to the crank when you check, and that the crank hasn’t moved. Now, the intake cam.
Which is the correct timing for a YZ Cam?
The bottom line is this, if your timing marks line up with the head with the I in “HI” on the flywheel lined up to indicate TDC then you are good to go. Looking at the picture and the fact that you say it runs good I would say that you are running a YZ cam and this would be correct timing.