A proper squish clearance can give your motor 10% more power. Most aftermarket cylinder kits are not made to this close tolerance of 0.6-0.8mm proper piston clearance. We check the squish band clearance and usually have to close the gap from .18 -.13mm down to .8mm gap for proper squish band function to work properly.
TWO-STROKE REED VALVE EXPLAINED
The reed valve is very important for a high perfomance DIO engine. It must
work correctly at idle and at 10,000 rpms. The valve material is of great
concern when building these engines.
DIO 54mm Piston Clearance TIPS
Small aluminum corners have been removed and piston has full un-opposed
travel throughout its 360 degree range. Cylinder deck height will me
measured and fitted next.
Really Cool Two Stroke Cylinder Porting Software
THIS GREAT PORTING PROGRAM CAN BE FOUND HERE:
http://www.porting-programs.com./ Software program for porting and
port-mapping, single cylinder, two-stroke motorcycle cylinders. I feel I am
lucky to find it in such an easy to use format with a very affordable
price. From beginners in porting,to brazen speed phreaks, this is a great
tool if your not a molecular, thermohydrus calculus genius space physicist
Math Scientist. Its all here and I cant wait to use this program to make my
Dio go faster!!!.
Cylinder Block Machining Video - Engine Building DVD
Buy the "Basic Engine Building" DVD
Basic Engine Building DVD - Chapter 25: Cylinder Block
By this time your block is disassembled and in the machine shop. One of the
most informative sections, here we take you behind the scenes to show what
goes on while your away. We show the process of align honing the main
bearing bore that is needed before anything else can be machined. Then the
block deck is leveled and machined as needed for the new head gaskets to
seat properly. And finally the cylinder walls are bored out just shy of
their new size, which will be achieved when they're honed.
BoxWrench.net is a community and resource designed for automotive
enthusiasts. The Basic Engine Building DVD is over three hours of engine
building that covers everything from removal and disassembly to final
assembly and engine start-up. This is the ultimate DVD for any home
mechanic or engine enthusiast that wants to see a complete rebuild from
Teardown to Start-Up. This video can be used to learn how to work on almost
any type of internal combustion engine including V8, V6, Straight 8,
in-line 6 and even 4 cylinder engines. All of the interactive features and
menus will not work over YouTube.
This video is great for people interested in car repair, car care, and
restoration. As well as hot rods, muscle cars, performance parts, and Boosting horsepower. It can also help
you to gain knowledge for increasing fuel economy, how to lower your
emissions, and covers preventative maintenance to avoid little things like
Get the full DVD with all of the interactive menus, Tools section and
engine Glossary terms here...
Educating the Automotive Enthusiast!
Don't forget our Holley Installation & Tuning DVD. Sample clips on our
youtube page and at our store here...
BoxWrench on Facebook:
Pro Circuit Engine Porting
An inside look into the Head Modification service offered by Pro Circuit.
There is a fine line to building an engine. If limits are pushed too far
there are reliability issues. Pro Circuit's goal is to give you the very
best in high-performance service without any loss of reliability. Pro
Circuit engine modifications will give you increased from bottom to top.
For more info and pricing (in New Zealand) on 2 or 4 stroke engine work by
Pro Circuit please contact Crown Kiwi Enterprises Ltd. Ph: 06-751 4550
Pro Circuit products are proudly imported & distributed in New Zealand by
Crown Kiwi Enterprises Ltd.
Video courtesy of Pro Circuit Inc.
Evinrude 300XP -91
After a few hours in the workshop..
The expansion chambers are "home made" by hydroforming. The original Exhaust is milled away and the engine
block is filled whit plastic.
This engine will get electronic fuel injection and will not be used in a
Note: This is a sponsored video for Forge Apollo
How to install pistonrings on a twostroke
Here I mount piston rings on a piston to a Speedfight 100cc and 50cc.
Surf to http://www.twostroke.se if you need new piston
Some hints, tricks and other things you should know at piston replacement:
Things to consider when installing an aftermarket Piston, is that you very
carefully to make sure it is identical with the piston as it is ordered in
the dimensions of the piston pin, both upwards and downwards, this so that
it can not turn the crank, push or hit the top when it rotates in the
Compare with your old piston before installation.
One must also carefully check every holes on the piston rings ports so that
they do not go over any channel in the cylinder, then the chances are that
the ruling in this case, sticking and breakage, leading to the cutting
cylinder. The arrow on the piston is at assembly towards the Exhaust port.
Choosing the piston:
B-piston recommend it for all used cylinders.
A piston for new cylinders or cylinders with new nicasil.
A B piston is slightly larger than an A piston in order to compensate for
wear. C piston is greater than B-piston etc..
Here you can see when I change the cylinder
Leak Down Test For 2-Stroke Engines.avi
In this ATV Racing tech segment, Luke shows you how to perform a simple but
very important leak check on a freshly assembled 2-stroke top end. For more
useful tech articles and everything you could need for your ATV, Dirt Bike,
Honda Pilot and much, much more, visit us at atvracing1.com