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Date: Wed, 14 Jun 2000 04:36:59
Subject: Re: piston Questions answered by Steve's
From: StevesMoped@aol.com
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In reference to your Tomos A3 motor breaking the new piston rings after you
installed a new piston and rings:
There are slight manufacturing tolerance differences in pistons and
cylinders. Also when your cylinder is worn it may not wear perfectly evenly.
Its best to send the cylinder to where ever you ordered the piston from. The
piston and cylinder tolerances can be checked and also the cylinder can be
honed which will put a brand new crosshatch finish inside the cylinder. This
will provide longevity, maximum compression and faster break in of the piston
and cylinder. Remember when ridding your moped the piston rings are passing
up and down the cylinder at 3000 to 6000 times per minute at a high
temperature. Just a thin oil film keeps them from scraping the walls of the
cylinder. When the cylinder is honed the cross hatch pattern helps hold the
critical lubrication in the cylinder walls. If your cylinder is in
reasonable condition the average cost of piston and cylinder evaluation and
honing is generally less than a set of piston rings. It is also very
important to take a needle nose pliers and spin the wrist pin clips after
installation to make sure they are seated. Never reuse the wrist pin
retaining clips. They are tiny spring C clips on the Tomos and should only be
used once. For under a dollar its not worth the chance on having one come
out and ruin your mopeds top end.
The parts and Service Department:
Steve's Moped & Bicycle World Inc.
40 Park Avenue Dumont NJ 07628
Main Mega Store: ph(201)384-7777 fAX(201)384-7831
Dumont Store Hours: Mon. and Fri. 10:30am-7pm Tues. & Thurs. Till 8pm
Wed. till 5pm Sat. 9:30 to 5pm E-MAIL MOPEDMOPED@AOL.COM
WEB ADDRESS WWW: STEVESMOPED.COM
.*****************************************************************************
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Smaller Satalite Store:
Also Steve's Moped World 2427 Bridge Ave. Point Plesant NJ 08742 (732)295-4200
Call Ponint Pleasant for hours. (closed mondays and open sundays)

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