ENGINE PERFORMANCE

For a given engine, the performance is its ability to breathe. i.e, Simply put, Everything! At its most basic level, an engine is an air pump.  More air entering the engine increases the efficiency of the combustion process creating more horsepower and torque. Horsepower is a measure of the engine's maximum power while torque measures how quickly you can accelerate.

so, here are some ways to increase the BREATHABILTY of your engine, by addition of some aftermarket components:
1.power air filters
2.free flow silencers
lets discuss each in depth:

POWER FILTERS:
the 2 major function of an air filter is to filter the dirt in air and to provide an optimum air flow for a rich air fuel mixture.
power filters are basically epoxy coated steel mesh sandwiching multilayer cotton gauge, set with an EPDM
frame.
there are scientific principles determining the filtration process:
1. interception
2.impaction and
3.diffusion

POWER FILTER

AIR FLOW IN POWER FILTER

RECOMMENDED AIR FILTERS: K&N FILTERS


FREE FLOW SILENCER:
 every exhaust system has some back presssure associated with the exhaust flow, which resists the flow of exhaust gases. these back pressure is developed because of various fittings in the mufflers. to reduce the resistant, we often use free flow silencers.

free flow silencer

CATIA V5R18 BOOK

If anyone is facing problem in clearing your concept about CATIA, then send me a query at anurag21291@gmail.com.I would mail you an E-book that would help you.

SKETCHER

we'll be using V5r18,
we'll be using the mechanical design chapter in catia with the following important modules:
1.sketcher
2.part design
3.assembly
4.wire frame

SKETCHER

this is how you get to sketcher module.

now lets see the various features involved in this module that would be useful in our design process.

 Similiarly, u can get the features of other module

for more details refer to to following blog

catiatutorial.blogspot.com

START DESIGNING - CATIA

Hello friends!!!
Itz been a long time now.. Now we should start the designing part using CATIA.

I would help you out with most of the features used to design a bike in catia.
SO lets START!!!!

Hard-tail vs Soft-tail Frames

FRAMES:
These is the most important aspect of a chopper. This has to strong and sturdy to give that Old School and Muscle look.So give it a good thought.
Well coming to basics, it is of two types:
1.Hard-Tail ( no suspension)

250- Rigid Frame

Hard-Tail has been around for a long time. Their simple construction has made it a popular choice among chopper builders.Chopper was meant to be inexpensive, light weight and skeleton body.this is the reason why most "Old School" builder prefer hard-tail as it is an epitome for choppers spirit.


2. Soft-Tail (suspension)

Soft tail is a frame with active suspension. it can either be A-arm or swing arm depending upon the design need.It has an added advantage as it provides better handling capabilities to the chopper.But with added parts comes complexities,hence it  requires regular maintenance and designing is difficult.

I would suggest beginners to stick to Rigid frame because of the ease of design.

180-soft-tail frame

CHOOSING THE RIGHT ENGINE!!!

Shopping for custom engine can be a hectic task for new comers....
So here's some some tips to get your right engine.
shopping for an custom engine and building a chopper quite an experience.
there are basically 2 ways by which u can get your engine:-

the first n perhaps the most common way for a beginner is to buy a running motorcycle and use its engine by clearing title. add a bit of chrome here n there and u r ready to roll...


the second way to  obtain your custom chopper engine is to buy a brand new engine...this would help as u get all the manual and mountings dimensions along with it...but i would suggest new comers to stick to the first method..

building a custom chopper is not an easy task but it can be a lot of fun. So enjoy it, Because the joy of riding something that you created is on the tops!!!!

Motorcycle Front Ends

Styles of Motorcycle Forks

When it comes to creating a custom chopper or customizing a motorcycle, the front forks (front end) of a motorcycle will have a significant impact on both the ride and aesthetics. The primary function of forks, however, is to attach the front wheel to the motorcycle. Motorcycle forks also provide the suspension and framework for mounting brake components and fenders. Understanding the characteristic differences between tube forks, springer forks and girder forks should help make choosing the right set easier when creating a custom chopper.
Tube Forks (Hydraulic Forks)

Tube Forks (Hydraulic Forks) Explained

Tube forks incorporate an internal shock and spring in one sealed unit. The smaller tube slides in and out of the slightly large tube that is sealed around it. Internal springs and hydraulic fluid serve to dampen the movements of the tube forks to smooth out the ride, just as on an automobile, providing the active suspension for the front wheel. Traditionally the rigid portion of the tubes are joined to the frame, via the triple trees, while the wheel axle is fastened to the active (live) forks. Hydraulic fluid levels must be checked periodically to insure proper operation.
Tube forks are available in conventional (traditional) and inverted configurations. Conventional tube forks have the smaller tubes fixed to the triple trees, while inverted tube forks have the larger tubes mounted to the triple trees. Both configurations essentially work the same way. Inverted tube forks have been used on sport bikes for years. Tube forks provide good dampening qualities for most applications where rake (angle from vertical) does not exceed 35 degrees. When used in higher rake applications the dampening affect may be reduced by side-loading stresses (pinch points) exerted on the tubes.

Tube forks are manufactured in several diameters, widths (distance between fork centers) and lengths. 41 and 39 millimeters are the industry standards for tube diameters, though other offerings are available. Fork widths vary from 10 inches (Harley Davidson Wide Glide) to narrower (Harley Davidson Sportster) styles. Some manufacturers have introduced the Mid Glide widths that fall in between the wider and narrower styles.

Springer Forks

Springer Forks use two sets of parallel forks. One set, mounted to the frame, remains rigid while the other set, the active set, absorbs the movement of the front wheel. The lower ends of the active forks are connected to the rigid forks through links called rockers. The rockers provide the pivot points by which the front axle is allowed to move. The upper ends of the springer forks are connected to the rigid axle through the suspension components, usually springs, shocks or a combination of both. When a shock absorber is added to the suspension components, vibration and harmonics are reduced. Both axles are then mounted to the frame through the (typically) integrated trees.

Since springer forks use a pivoting rocker, they are ideal for use where longer forks are needed. The overall movement of the rockers is relatively unchanged no matter the length of the forks. This is great for rakes exceeding 35 degrees. Because of their elegantly simple design, springer forks are comparatively lighter than tube forks and require less maintenance.

If an old school look is desired, than springer forks may be the right choice for a custom chopper, or customizing a motorcycle. In either case, allowances will have to be made for mounting fenders and brake hardware.

Girder Forks

Though not as well known as tube forks or springer forks, girder forks have been around a long time. Girder forks are similar in looks to springer forks but are constructed quite differently. Girder forks are rigid; each side being welded together at the top and at the point where the axle is mounted. The entire assembly is then fastened to integrated triple trees through the active suspension. All active movement takes place at the trees. A four bar (parallel link) mechanism provides the method for mechanical movement. The suspension components usually consist of a spring, shock, or combination of the two. Adding the shock reduces the affects of harmonics and vibration.

Mounting points for hardware, such as brake components and fender, are usually found on girder forks. Because the front axle is mounted on rigid forks allowances for wheel travel do not have to be factored into hardware mounting, unlike that of the springer forks. Girder forks are ideal for greater rake angles and situations where longer fork length is required.

This information is taken from:

http://hubpages.com/hub/Motorcycle-Front-Ends