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My tappets don't fit #705072
08/15/17 2:52 am
08/15/17 2:52 am
Joined: Mar 2006
Posts: 1,191
Magnolia, TX
H
htown Online content OP
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htown  Online Content OP
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H
Joined: Mar 2006
Posts: 1,191
Magnolia, TX
Ordered a new set of tappets from LP Williams, 3 of them fit, 3 of them are too tight and bind in the holes. I can switch them around in different holes and it doesn't matter. I tried miking them and I couldn't come up with much of a difference in the diameters. What to do other than return them which will sit project back.


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1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
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Re: My tappets don't fit [Re: htown] #705155
08/15/17 8:49 pm
08/15/17 8:49 pm
Joined: Mar 2006
Posts: 1,191
Magnolia, TX
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htown Online content OP
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htown  Online Content OP
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H
Joined: Mar 2006
Posts: 1,191
Magnolia, TX
Took it over to my local machine shop. The stem on the tite tappets measured one to two thou larger than the ones that fit. They reamed the bores larger to give .5 to 1.5 thou clearance.


1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.
Re: My tappets don't fit [Re: htown] #705177
08/16/17 12:56 am
08/16/17 12:56 am
Joined: Dec 2013
Posts: 3,530
ohio, usa
kevin roberts Online content

fefsa
kevin roberts  Online Content

fefsa
Joined: Dec 2013
Posts: 3,530
ohio, usa
i had the same problem with some kibblewhite tappet blocks i put into my T120. thee tappets fit fine before i installed them, but the blocks compressed just enough afterwards for several of the tappets to fail to slip into the bores freely. i had my machinist ream the inside of the tappet blocks very slightly and they've been fine.


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Re: My tappets don't fit [Re: htown] #706366
08/27/17 10:02 am
08/27/17 10:02 am
Joined: Apr 2015
Posts: 346
Kenya
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Peter Gee Online content
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Peter Gee  Online Content
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Joined: Apr 2015
Posts: 346
Kenya
Polish the offending tappet stems with 1500 or 2000grade Emery strips cut to size, using the correct "belt pulling" technique and fit by trial, one by one. I have a stand mounted vice. I put the tappet foot in a soft jaw , then with a emery strip and a drop of light oil, walk around the vice slowly whilst simultaneously and continuously pulling back and forth on the strips. keep stopping and checking against the tappet block itself. Should work fine



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