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  1. #1
    305coco's Avatar
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    Svho rod bearing measurements

    Does anyone happen to know the order in wich the svho rod bearing are color coded, as in wich one is the thinest to thickest? And how much thicker is one from the next size up? The manual lists colors but no sizes,
    Been searching for this info with no luck.

    Thanks in advanced for your help.

  2. #2
    you can look up in the OEM parts finder....it tells the sizes of the colors

  3. #3
    oh nevermind i was dreaming lol


  4. #4
    Can anyone shed some more light on this topic. What colors are what. As well as what is the desired clearance spec

  5. #5
    jetdawg701's Avatar
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    I can offer a little bit of info, at least on the early rod bearings. I just rebuilt a blown engine with front piston and head damage out of a recently purchased 2018 GP1800. This was my first time rebuilding a four stroke engine so i’m still learning. I went with early style Molnar rods, which are the pre 2013 SHO style rods, (newer style SVHO rods were backordered of course). I used Yamaha’s connecting rod color code chart for years up to 2012, rod chart colors for 2013 and newer are different, don’t confuse the years or you’ll end up with the wrong color/bearing size and fitment. Yamaha changed the rods slightly in 2013, (the bearing lock tab was moved outward, but basically the same rod.
    I don’t have exact measurements but i found the green bearing provided the most oil clearance, blue provided approx .0002” tighter clearance, black shrank it another .0003” and brown reduced it another .0003” roughly, which was to tight.
    The stock rods were all marked #5, the crankshaft markings indicate all rod pin sizes #1, therefore #4 Green bearings (newer type). Since i went with older style Molnar rods i had to use the pre 2013 color chart. I read that Molnar sizes their rods to #4 so i subtracted my #1 crank pin size which equates to #3, therefore (Blue) bearing. The blue bearing gave me .0016” oil clearance, green would’ve worked also. Yamaha calls for 0.0008-0.0022” pin oil clearance.
    Motor is running great as a Riva stage 2 with almost 10 hours on it now.

    Yamaha rod Color charts w/bearing part numbers...
    <2012
    #1 Brown 6S5-11656-00-00
    #2 Black 6S5-11656-10-00
    #3 Blue 6S5-11656-20-00
    #4 Green 6S5-11656-30-00
    2013>
    #1 Blue 6S5-11656-40-0
    #2 Black 6S5-11656-50-00
    #3 Brown 6S5-11656-60-00
    #4 Green 6S5-11656-70-00

    I would assume part #-40-70 would go from tightest to loosest also, but verify!!!

    ALWAYS PLASTIGUAGE OR MIC YOUR BEARING OIL CLEARANCES!
    Crankshaft journal/engine case bearing color chart remains unchanged for all years.
    Correct me if i’m wrong.


  6. #6
    Quote Originally Posted by jetdawg701 View Post
    I can offer a little bit of info, at least on the early rod bearings. I just rebuilt a blown engine with front piston and head damage out of a recently purchased 2018 GP1800. This was my first time rebuilding a four stroke engine so i’m still learning. I went with early style Molnar rods, which are the pre 2013 SHO style rods, (newer style SVHO rods were backordered of course). I used Yamaha’s connecting rod color code chart for years up to 2012, rod chart colors for 2013 and newer are different, don’t confuse the years or you’ll end up with the wrong color/bearing size and fitment. Yamaha changed the rods slightly in 2013, (the bearing lock tab was moved outward, but basically the same rod.
    I don’t have exact measurements but i found the green bearing provided the most oil clearance, blue provided approx .0002” tighter clearance, black shrank it another .0003” and brown reduced it another .0003” roughly, which was to tight.
    The stock rods were all marked #5, the crankshaft markings indicate all rod pin sizes #1, therefore #4 Green bearings (newer type). Since i went with older style Molnar rods i had to use the pre 2013 color chart. I read that Molnar sizes their rods to #4 so i subtracted my #1 crank pin size which equates to #3, therefore (Blue) bearing. The blue bearing gave me .0016” oil clearance, green would’ve worked also. Yamaha calls for 0.0008-0.0022” pin oil clearance.
    Motor is running great as a Riva stage 2 with almost 10 hours on it now.

    Yamaha rod Color charts w/bearing part numbers...
    <2012
    #1 Brown 6S5-11656-00-00
    #2 Black 6S5-11656-10-00
    #3 Blue 6S5-11656-20-00
    #4 Green 6S5-11656-30-00
    2013>
    #1 Blue 6S5-11656-40-0
    #2 Black 6S5-11656-50-00
    #3 Brown 6S5-11656-60-00
    #4 Green 6S5-11656-70-00

    I would assume part #-40-70 would go from tightest to loosest also, but verify!!!

    ALWAYS PLASTIGUAGE OR MIC YOUR BEARING OIL CLEARANCES!
    Crankshaft journal/engine case bearing color chart remains unchanged for all years.
    Correct me if i’m wrong.
    Actually on rod bearings two of the color orders changed from the SHO to the new style bearing.

    Speaking of which, it is vital that you use the correct rod bearing style, new or old. Using the wrong bearing will cause engine failure and soon. Using the old bearing on the SVHO rod will not give enough side clearance and the bearing will hit the crank chamfer at the edge of the journal. The tabs are located in different places.

  7. #7

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    You need to replace them with whatever size your engine has. No 2 motors are the same. You have stamps on the crank and rods to look at and also a stamp on the block. If you have the motor apart, just note the bearing colors and replace them with the same colors.

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