Best way to enlarge small ends

48lesco · Post by **48lesco** » Fri Apr 13, 2012 12:56 pm

Thanks conbs! was wondering the same things myself. All I've ever read is that the oversize pins are available to take care of the problem. Nothing on the procedure. As "W" once said "its not rocket surgery" and I believe I will prevail... Thanks to Jensen for explaining what to look out for. Anyone have any old rods to practice on?
-48

jensen · Post by **jensen** » Fri Apr 13, 2012 1:00 pm

Hi,

I wish you good luck, the Honda part number of the (adjustable) reamer is 1000406-8. This reamer wasn't part of the standard toolbox, you can use any adjustable reamer,

Jensen

LOUD MOUSE · Post by **LOUD MOUSE** » Fri Apr 13, 2012 1:15 pm

I've done it and never a problem.
A little here, a little there and Test, Test, Test.
I sell AM DREAM pistons which come with the pin holes not large enough so I carefully do each hole and no problems.
Seriously. ...............lm

jensen wrote:Hi,

I wish you good luck (sinuously),

Jensen

jensen · Post by **jensen** » Fri Apr 13, 2012 1:26 pm

Hi Ed,

It's just an advice, and you give also your advice, there was a time that I would start a discussion right now, but I got wiser,

Jensen

LOUD MOUSE · Post by **LOUD MOUSE** » Fri Apr 13, 2012 1:36 pm

I think ya have made several statements and I've made mine.
I think I am able to ream correctly enough to acquire a tolerance to spec.
I've known those who ream the piston all to loose as they think the pin should rotate as the engine runs.
Tough to fix that.
Also those who press/force the pin into the piston and aren't aware that the piston may crack with heat over time.
Careful as ya go and things can be OK. .... ..........lm

jensen wrote:Hi Ed,

It's just an advice, and you give also your advice, there was a time that I would start a discussion right now, but I got wiser,

Jensen

mike in idaho · Post by **mike in idaho** » Fri Apr 13, 2012 2:43 pm

A light push fit, at room temperature, is what I would strive for. If you clamped both rods between two pieces of bar stock, to keep them in the same plane, and used a piloted reamer with the pilot in the opposite rod end you might be able to keep things more or less square. Seems like a lot of work just to end up with a bunch of non-standard parts in the engine, I would look for a pair of rods first.

LOUD MOUSE · Post by **LOUD MOUSE** » Fri Apr 13, 2012 5:48 pm

The rods were not made available to the US.
Ya had/have to buy a new crank assy if you loose a rod for some reason. (not many places can disassemble/assemble a crank these days around here)
I pretend the work I'm doing is on a single cylinder engine as there is always a couple of THO play at the big end and I dress the small ends one at a time. .........lm

mike in idaho wrote:A light push fit, at room temperature, is what I would strive for. If you clamped both rods between two pieces of bar stock, to keep them in the same plane, and used a piloted reamer with the pilot in the opposite rod end you might be able to keep things more or less square. Seems like a lot of work just to end up with a bunch of non-standard parts in the engine, I would look for a pair of rods first.

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Best way to enlarge small ends