Author [NL] [FR] [ES] [DE] [SE] [IT] Topic: Valve Shimming  (Read 1828 times)

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  • Offline THRASHED

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    Offline THRASHED

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    Valve Shimming
    on: Apr 20, 2021, 01.21 am
    Apr 20, 2021, 01.21 am
    Here we go.  Everything torn down and measured. All the exhaust valves need shims. All the intakes are about .005 so I may just open them up a bit since I've got to pull the cams anyway.  My question is: what shim kit works, and are the shims replaced, or are thin shims added to the existing shim?

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    Offline LarryJa

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    Re: Valve Shimming
    Reply #1 on: Apr 20, 2021, 01.37 am
    Apr 20, 2021, 01.37 am
    You have to replace shims to change clearances.
    You use a thinner shim to increase clearances.
    I bought a "Hot Cams" 9.48mm shim kit to do mine last year.
    That & a triumph service manual will get you started.
    A good man once told me, "Don't sell your bike. It's your soul."....

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    Re: Valve Shimming
    Reply #2 on: Apr 20, 2021, 01.59 am
    Apr 20, 2021, 01.59 am
    Thanks for that.  The kit is now on the list.  Along with a bunch of other stuff...of course... :033:

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    Re: Valve Shimming
    Reply #3 on: Apr 21, 2021, 06.21 pm
    Apr 21, 2021, 06.21 pm
    I made a Microsoft Excel application that will determine the correct shims needed to properly adjust your valve clearance, count and list the shim sizes you have and the those needed with the Triumph part number required.
    As always, assume the normal disclaimer, use at your own risk type of preamble. Even if you use it just to double check your own calculations.  Additional comment, I set my valves to the loose side of the specification. Valve clearance will only grow tighter.
    https://www.dropbox.com/s/4s61jg2vb7p4n85/TT%20Valve%20DOWN.xls?dl=0

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    Offline Yaga1973

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    Re: Valve Shimming
    Reply #4 on: Apr 21, 2021, 08.50 pm
    Apr 21, 2021, 08.50 pm
    Thanks for sharing, Nert!
    Ride safe, ride often!

    One of the "New" Founding Members of the Twisted Trophies

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    Re: Valve Shimming
    Reply #5 on: Apr 22, 2021, 04.28 pm
    Apr 22, 2021, 04.28 pm
    Thanks for sharing that. First off, how do I sign in?  Second, will most kits (Hot Cams etc) carry enough shims, or do I need to remove and measure ever shim before ordering a kit? 

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    Re: Valve Shimming
    Reply #6 on: Apr 23, 2021, 12.08 am
    Apr 23, 2021, 12.08 am
    There is no sign in needed. To the right of Sign, In Sign Up you will see a down arrow for download. Click Download Arrow, click Direct Download. The file will be saved to your computer presumably your Download Folder, or what ever folder you deemed as your download folder. Double click the file to open in Excel. When opening, you will be warned by Excel that the file has macros. You need to enable the macros, as I use macros to determine what shims, are needed, the quantity of each and the Triumph part number. The file also takes into consideration the shims you have in the engine already so the shim list you need to get from Triumph are only the ones you really need, because it uses the ones you are removing.

    As the workshop manual says, You need to measure your valve clearance BEFORE you remove the cams. Type those clearances in the Measure Gap Column for the appropriate Intake and Exhaust valve. After removing the cams, you then need to read the Shim # you remove, and type that number into the corresponding column for the appropriate Intake and Exhaust valve.  After all the clearances are in and all the shim numbers are in, click the big CLICK FOR COUNT button, and the calculations will tell you the quantity and Triumph part number of the shims you need to acquire. The Row for the appropriate Intake Exhaust valve will tell you the New shim number you need to install to get the desired clearance, and provide the Triumph part number for that shim.
    After installing the correct, calculated shims, properly install the cams, and measure your new clearance.

    does this make sense?

    Enjoy!

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    Re: Valve Shimming
    Reply #7 on: Apr 23, 2021, 04.27 am
    Apr 23, 2021, 04.27 am
    That makes total sense. Thanks for that.  So, skip the generic kits, measure clearances (already did that) and buy exactly what I need.  Thanks a lot for this.