Please help! Rebuilt 1969 CL350 Valve adjustment Help. Video Included
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Thread: Please help! Rebuilt 1969 CL350 Valve adjustment Help. Video Included

  1. #1
    Junior Member cl350john's Avatar
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    Please help! Rebuilt 1969 CL350 Valve adjustment Help. Video Included

    I just finished putting this motor back together. I got to the top end and installed the rockers and rocker arms. When I went to adjust the lash, the exhaust side is so tight, I can't get any gap. As a matter of fact, the right side cylinder exhaust valve is slightly open. Left side cylinder is at TDC, cam is in the 12:00 position and Cam sprocket is mounted on the cam with level line on top. Valve adjusters are turned out as far as they will go. What am I doing wrong???

    Link to video:

  2. #2
    Senior Member Boomer343's Avatar
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    Nothing wrong. The only spot on the cam that has some free play on all the rockers is about 90 counterclockwise from your current location.

    Read up on setting the valves and which stroke you have to be on. BTW I wouldn't set the valves until the engine is assembled.

  3. #3
    Junior Member cl350john's Avatar
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    According to the manual, the adjustments must be made with the left cylinder at TDC. At this state, both the inlet and exhaust ports are closed. This condition can be inspected by shifting the rocker arms with fingers through the tappet holes and, if the the rocker arms are free, it is an indication that the valves are at closed position... The only reason I don't have the valve cover on is because I couldn't get any free play in the rockers so I removed the valve cover to see what is going on. Please help! Rebuilt 1969 CL350 Valve adjustment Help. Video Included-img_5355.jpg
    1969 Honda CL350 Cafe build in progress
    2018 KTM 390 Duke

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    Senior Member 83XLX's Avatar
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    The index marks on the adjustment shafts should be pointed at a downward angle toward their respective adjustment access caps.

    Please help! Rebuilt 1969 CL350 Valve adjustment Help. Video Included-img_1706.jpg
    1969 Honda CL350
    1983 H-D XLX-61 Sportster

  6. #5
    Supporting Member Yendor's Avatar
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    Just as your Passgae above says:
    The LEFT cyclinder is on "EITHER the Exhaust or the Compression Stroke.
    You need to rotate the Crank 360 Deg to move to a Compression Stroke.
    Also you need ALL (8) Studs to be tightend down or the free play in the Valve Train will change as the head gasket and gasket stack of:
    - Lower Cylinder Jugs
    - Head Gasket
    - Lower Rocker Box Gasket
    - Upper Rocker Box Gasket
    - Oil Splash Plate Gasket
    All compress and change the spacing in the stack of parts

    BTW: What Manual did you get that passage from? Is it a Clymers?
    The OFFICAL - Honda 350 FSM says to use 90 Deg PAST TDC as the position where ALL Valves will be free and on the back side of the cam.
    1970 CB 350 CAFE - Current Project on the bench,
    1972 CB 350 K4 Red - Now a Happy Rider ! !
    1972 CB 350 K4 Green (My Sons) DONE - YES !,
    1st Bike 1970 SL 350 (Brought home in Parts - Trailer/Trunk/Back Seat - I miss that bike),
    2nd - Bike Kawasaki 750
    3rd - '73 XLCH 1000

  7. #6
    Junior Member cl350john's Avatar
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    Just to be clear, I did have the motor completely assembled with the Oil Splash Plate torqued down when I was trying to make my adjustment. I downloaded the manual from the internet. It says it’s for a CL350. 90 degrees past TDC makes more sense that all valves would be free. My stupid manual says nothing of the sort. Thank you for the help everyone!

    Quote Originally Posted by Yendor View Post
    Just as your Passgae above says:
    The LEFT cyclinder is on "EITHER the Exhaust or the Compression Stroke.
    You need to rotate the Crank 360 Deg to move to a Compression Stroke.
    Also you need ALL (8) Studs to be tightend down or the free play in the Valve Train will change as the head gasket and gasket stack of:
    - Lower Cylinder Jugs
    - Head Gasket
    - Lower Rocker Box Gasket
    - Upper Rocker Box Gasket
    - Oil Splash Plate Gasket
    All compress and change the spacing in the stack of parts

    BTW: What Manual did you get that passage from? Is it a Clymers?
    The OFFICAL - Honda 350 FSM says to use 90 Deg PAST TDC as the position where ALL Valves will be free and on the back side of the cam.
    1969 Honda CL350 Cafe build in progress
    2018 KTM 390 Duke

  8. #7
    Junior Member cl350john's Avatar
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    Is there somewhere I can download the OFFICIAL manual?
    1969 Honda CL350 Cafe build in progress
    2018 KTM 390 Duke

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    Senior Member Boomer343's Avatar
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    Give longdistance rider a PM and he will send it to you.

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    Senior Member ancientdad's Avatar
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    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  11. #10
    Supporting Member Yendor's Avatar
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    I NEED TO CORRECT MYSELF !

    I went back and re-read my HONDA 350 FSM.
    I have to admit I was confusing the CAM Tensioner Adjustment Point with the Valve Adjustment Crank Setting.

    It is the CAM CHAIN TENSIONER that is set at 90 Deg past TDC - NOT the Valves.
    While that point would "PROBALY WORK" - it is NOT the HONDA Suggessted point for Valve Adjustment.

    The FSM Recommend that Each Cylinder have the valves adjusted seperatly at "LF and/or "F" for the Left and Right Sides.
    With the COVER Off just make sure that you can WIGGLE the Rocker and that both intake and Exhaust are frre and not under tension from CAM lobe.
    It either is tight rotate the Crank 360 Deg.

    SORRY !
    cl350john likes this.
    1970 CB 350 CAFE - Current Project on the bench,
    1972 CB 350 K4 Red - Now a Happy Rider ! !
    1972 CB 350 K4 Green (My Sons) DONE - YES !,
    1st Bike 1970 SL 350 (Brought home in Parts - Trailer/Trunk/Back Seat - I miss that bike),
    2nd - Bike Kawasaki 750
    3rd - '73 XLCH 1000

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