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General Category => General Discussion => Topic started by: Moto on April 21, 2019, 08:15:28 AM
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Can I fit 10mm-hex nuts on my T3's tappet adjuster screws without creating a problem? I recall the nuts are 11mm.
With 10mm nuts I could use this Motion Pro tappet adjustment tool (they don't offer an 11mm version):
(https://84c0542ad5d322f08f06-651d7fb22d7870bee4d1cd6d755230af.ssl.cf1.rackcdn.com/product-photos/08-0586/lg_08-0586.jpg)
https://www.motionpro.com/product/08-0586 (https://www.motionpro.com/product/08-0586)
Using a different version for my Buccaneer 250 was a great help last night, and made me think one would be nice for the T3 (and also for my Griso 1100, which I recall has 10mm adjusters). That big knob -- along with the 12-point wrench that can easily be repositioned while the knob is held in place -- makes fine-tuning the gap a breeze.
Also, does anyone know the thread size of the T3's tappet screws?
Moto
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Seems plausible.
I drop a box end wrench over the adjuster nut then clamp a tiny vice grip to the flats on the adjuster stud and with hand hold the vice grip while I turn the box end wrench. Not as elegant as the proper tool but it works for me.
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Seems plausible.
I drop a box end wrench over the adjuster nut then clamp a tiny vice grip to the flats on the adjuster stud and with hand hold the vice grip while I turn the box end wrench. Not as elegant as the proper tool but it works for me.
This is how I have always done it as well.
Tom
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Size on tappet studs is 8x1mm. Guzzi went from a 13mm nut to a lighter 11mm nut about T3 era. If that became a 10mm nut it would leave only 1 mm of metal thickness. Unless it was made of some type of unobtanium ($$$/ Guzzi content) it would be weak IMHO.
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Size on tappet studs is 8x1mm. Guzzi went from a 13mm nut to a lighter 11mm nut about T3 era. If that became a 10mm nut it would leave only 1 mm of metal thickness. Unless it was made of some type of unobtanium ($$$/ Guzzi content) it would be weak IMHO.
Excellent points. I suppose then that the 10mm hex nuts on the Griso 1100 are mating with a smaller adjuster, maybe 6mm?
(That is, if I am right that those are 10mm nuts.)
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Never mind! I see from MG Cycle's listings that I am wrong, and that my Griso shares the same 11mm nuts as my T3.
Thanks, Guzzista.
Silly me.
Moto
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I cut a groove in a 3/8" or so allen wrench (with a Dremel) to turn the adjuster. You can use it with a box end wrench on the nut.
Rich A
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I cut a groove in a 3/8" or so allen wrench (with a Dremel) to turn the adjuster. You can use it with a box end wrench on the nut.
Rich A
Even better is a round shank screwdriver, cut it shorter, and cut the grove in it... give you a nice handle to hold, turn. I made one up years ago for a old car I had back in the day. Cant even remember why through the fog of time, but it worked well. its kinda like a slightly bigger tire valve core remover.
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Those are three excellent suggestions. I've used a needle-nose Vise Grip. But I'll either modify an Allen wrench or a round-shank screwdriver after I take another look at the actual motor.
Those Motion Pro tools are indispensable for the little Buccaneer, but Guzzis are a whole different story.
Thanks to all.
Moto
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I check the rocker clearance on my T3 once in a blue moon (maybe every 10K miles) just out of guilt. Has a bit over 90K miles so far (70K on Ghilardoni Cylinders and valve rebuild by Memphis Motor Works). Maybe every 20K miles I might have to touch up an exhaust valve by 0.001". For adjustmen's that infrequent ordinary wrenches prove quite sufficient.
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I check the rocker clearance on my T3 once in a blue moon (maybe every 10K miles) just out of guilt.
That guilt motivates me to look after the poor things once every so often as well. :sad:
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That guilt motivates me to look after the poor things once every so often as well. :sad:
Most stable set of heads I have ever seen. So far the EV doesn't seem to be any less stable.
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Found a tool similar to Motion Pro, but made for 11mm Guzzi tappet adjustment nuts. No affiliation
https://www.ebay.com/itm/Moto-Guzzi-Valve-Adjustment-Tool-850-1000-1100-Big-Blocks-NEW/142165705809?hash=item2119bc8451:g:9LMAAM
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Found a tool similar to Motion Pro, but made for 11mm Guzzi tappet adjustment nuts. No affiliation
https://www.ebay.com/itm/Moto-Guzzi-Valve-Adjustment-Tool-850-1000-1100-Big-Blocks-NEW/142165705809?hash=item2119bc8451:g:9LMAAM
Thanks for that! I found it too, on another web page that I decided looked fishy. But this one seems OK.
Moto
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I use a baby (3" long) metric adjustable end wrench to hold the adjuster.
Larry