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#Post#: 2244--------------------------------------------------
Piston to cylinder clearance
By: olebmw Date: January 4, 2018, 4:00 pm
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I am ready to fit a new piston and need to know what the factory
recommended piston to cylinder clearance is.
I have a reprint of the "Istruzioni Per Le Riparazioni E La
Revisioni Generale'' in Italian which does me little good.
Is there a reprint of this manual in English,anywhere on the net
that I can print?
#Post#: 2245--------------------------------------------------
Re: Piston to cylinder clearance
By: randall Date: January 5, 2018, 9:01 am
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Hello,
a German version of the Repair Work shop manual
HTML http://www.guzzitreff.de/cms/index.php?Technik/Reparaturhandbuch-NF500-%28deutsch%29
#Post#: 2246--------------------------------------------------
Re: Piston to cylinder clearance
By: olebmw Date: January 5, 2018, 3:57 pm
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no speak or read the Deutsch either.
#Post#: 2267--------------------------------------------------
Re: Piston to cylinder clearance
By: cloggy Date: January 17, 2018, 3:50 pm
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XT500s have a similar sized piston and the safe clearance on
those is 3.5 thou
#Post#: 2268--------------------------------------------------
Re: Piston to cylinder clearance
By: olebmw Date: January 18, 2018, 1:08 pm
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Wow, I was thinking 1.5 thousands. If I did the conversion math
correctly from the German manual, I came up with around 1.5
#Post#: 2269--------------------------------------------------
Re: Piston to cylinder clearance
By: banquo Date: January 23, 2018, 3:43 am
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I've translated the inspection section of the workshop manual
using Bing Translator, which states:
The mounting clearance between piston and cylinder must be
0.395-0.440 mm. Ovality 0.13 - 0.17 mm.
Ring gaps: 0.3 - 0.4mm.
I've just had mine bored and honed to that spec. so better hope
it's right... ;D
#Post#: 2273--------------------------------------------------
Re: Piston to cylinder clearance
By: olebmw Date: January 23, 2018, 3:59 pm
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The 0.395 mm converts to just over 1.5 thousands [ .01555] of an
INCH, correct?
Cloggy, I thought your measurement was in inches, my mistake.
Thanks for both of your help.
#Post#: 2274--------------------------------------------------
Re: Piston to cylinder clearance
By: banquo Date: January 23, 2018, 5:08 pm
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0.395 x 1000 / 25.4 = 15.5 thou NOT 1.5 thou, which is the route
to very expensive pain....
#Post#: 2276--------------------------------------------------
Re: Piston to cylinder clearance
By: olebmw Date: January 26, 2018, 11:16 am
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I can assure you I wasn't going to have the cylinder bored .o15
inches.
Does .00155" -.00173'' sound better?
I don't understand how to convert .395 mm to inches and get
.00155.
Shouldn't the measurement in the repair book be .0395- .0440 ?
What am I missing?
#Post#: 2277--------------------------------------------------
Re: Piston to cylinder clearance
By: banquo Date: January 26, 2018, 11:38 am
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The calculation's in the previous post....
25.4mm in an inch, so to convert mm to inches, divide by 25.4.
0.395mm/25.4 = 0.015551"
x 1000 to convert to thou = 15.55 thousandths of an inch.
Sounds a lot, but that's what the book says....
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