April 26th, 2020, 09:03 AM | #1 |
ninjette.org newbie
Name: Raymond
Location: Ft Worth, TX
Join Date: Mar 2017 Motorcycle(s): a few Posts: 2
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measuring stock valve shims...
Hello all, Been working on the 2010 ninja; bike currently has 10K miles and hadnt been run since 2017. Bought it for my son a couple of years ago, he rec'd his "real" license for a cage and the ninja got parked. I pulled it out of the garage to clean up the carbs and get it running for my older daughter who wants to start riding. Cleaned the carbs and re-jetted them and figured while i am this far might as well check the valves.
All valves were in spec except for #2 cylinder exhaust. The inside valve lash of #2 cylinder measured at .13mm and the outside valve lash of #2 measured at .10mm. I popped the cams out and the inside shim looks to be stamped 78 while the outside shim looks to be stamped 75. I measured the shims with a caliper and the 78 shim reads .177 mm and the outside shim reads .175 These look like stock shims. I thought the stock shims were "2" plus the number stamped; as 2.75 and 2.78 So my math shows i need a .52 to get #2 inside valve to .255 the #2 outside valve shows to be .02 shim to set lash at .255 using A + B - c = D I have posted pics of the shims and the rotor which has no timing marks. Had to check TDC with a screw driver in the spark plug hole and watch the valves as they rotated through intake opening. Thanks for reading and thanks for any insight |
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April 27th, 2020, 07:03 AM | #2 |
ninjette.org newbie
Name: Raymond
Location: Ft Worth, TX
Join Date: Mar 2017 Motorcycle(s): a few Posts: 2
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measure twice, cut once...
So, carried the shims to work this morning and asked our machinist to measure the shims. Both came out correct. 2.75 and 2.78 I have no idea why/how I measured what i measured.
Is anybody trading shims out any more? Still wondering about the weird "lines" on the alternator rotor. Any of ya'll seen this before? Take it easy rtp |
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April 27th, 2020, 01:03 PM | #3 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Measurement differences could be due to "zero" setting of your micrometer.
I changed our 2 shims on last valve-adjustment. Mix-n-matched them to get best fit possible. Remaining 2 couldn't be accommodated with what I had, so changed them out. |
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