Jet size 85 vmax

[MrMAX1985]

Hi all, I have an 85 that is completely stock and I pulled the carbs apart for cleaning and found all 4 main jets with 152.5 on them. Is this Ok or should I put 150's in cyls 1&3?
"EDIT" 150's in 2&4.

 

[Fire-medic]

VMX12- Service-Manual.pdf (vmoa.net)

 

[MrMAX1985]

I have the original service manual from when I bought the bike back in 85, this is why I am confused. Edit to my original post 150's in 2&4.

 

[maleko89]

Original service manual had smaller mains in rear cylinders but Yamaha changed that to 152.5’s all around later. Depending on altitide, might be better putting 150’s or even 147.5’s in.

 

[MrMAX1985]

Ok

 

[Fire-medic]

If it's stock internally, the 150 is a good compromise, as they are jetted a bit rich from the factory. I am at sea level (unless I cross an overpass) and the bike is using 147.5 mains. It runs well.

 

[MrMAX1985]

Anyone have a valve adjusting shim kit that I could use/rent? I have 4 intake valves at .0025 cold that I would like to get back to .004-.006 before I put the valve covers back on with new gskts and reinstall carbs. I had sent a message to Morley a week ago but have not heard back from him.