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XJ900f 4bb Crank and Cam Timing Setup

Discussion in 'XJ Technical Chat' started by letmwhirl, Jun 23, 2021.

  1. letmwhirl

    letmwhirl New Member

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    So, I have a 93 Xj900f and have replaced the piston rings and have done a valve job. Getting ready to setup the timing and am not clear on the crank position before aligning the Cams. The book says align the T mark with the pointer. However, there was no pointer on this motor when I disassembled it. TDC (pistons 1 and 4) results in the T mark as shown in the attached photo. Any help would be appreciated. 3469883F-5E23-4F90-9006-036945C80E77.jpeg
     
    letmwhirl, Jun 23, 2021
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  2. Franz

    Franz Well-Known Member

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    That is exactly the way my 4BB 900f is timed T mark lined up with the top pick up coil. My engine does not have the pointer either. Welcome to the forum.
     
    Last edited: Jun 23, 2021
    Franz, Jun 23, 2021
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  3. letmwhirl

    letmwhirl New Member

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    Hello Franz, many thanks for responding. So you setup the T mark on the top pickup coil and then align the cams according to the book?

    your 900 looks awesome.. mine had a few cosmetic problems when I bought it. Therefore I am converting it to a street cafe bike. It is a long time project.
     
    letmwhirl, Jun 23, 2021
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  4. Franz

    Franz Well-Known Member

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    Yes the holes in the cams can be seen through the camshaft caps on the right hand side of the engine when cam timing is correct and the T mark on the rotor is on the top pick up coil at the crank. These are the correct timing positions on the engine.

    Once you post five notices you can post photos of your project.
     
    Last edited: Jun 23, 2021
    Franz, Jun 23, 2021
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