Author Topic: What is the thread size of the 42mm fork reflectors for K1? M6 don't fit  (Read 751 times)

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Offline DesertKyorugi

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I received my Yamiya fork ears and was trying to install the small 42mm reflectors with M6 thread and it doesn't fit. The fork ears were M5 threaded. Did I get the wrong fork ears or my reflectors were the incorrect ones?

Also, none of my turn signal stems fit on the fork ears. The holes on the fork ears are M10 and my turn signal stems are M12.
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Offline Don R

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Re: What is the thread size of the 42mm fork reflectors for K1? M6 don't fit
« Reply #1 on: October 15, 2020, 07:39:15 PM »
 Early (KO) fork ears were m5, later big reflectors were m6. I ran small reflectors on a 71 for a while, I tig brazed the m6 hole shut, drilled and retapped it. 
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Offline DesertKyorugi

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Re: What is the thread size of the 42mm fork reflectors for K1? M6 don't fit
« Reply #2 on: October 15, 2020, 08:29:21 PM »
Early (KO) fork ears were m5, later big reflectors were m6. I ran small reflectors on a 71 for a while, I tig brazed the m6 hole shut, drilled and retapped it.

Thanks Don. Lucky would have it I found some K0 small reflectors with m5 stem  :) Now I just need to hunt for the correct turn signal stems.
US '71 CB750K1 Stored for 39 years, currently running
US '71 CB750K1 Currently running
JDM '71 CB750K1 Stored for 21 years, currently running
US '70 CB750K0 Stored for 28 years, currently in restoration
US '70 CB750K0 Stored for 43 years, currently in restoration
US '70 CB750K0 Currently waiting to be restored
US '73 CB500K2 Stored for 40 years, currently running

Offline bryanj

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Re: What is the thread size of the 42mm fork reflectors for K1? M6 don't fit
« Reply #3 on: October 16, 2020, 01:15:15 AM »
Same as 500 K0 i believe
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