RAPTER_660
09-11-04, 02:52 PM
Vito's 404 Big Bore + Adams Racing Porting
http://www.thebansheezone.com/Bansheezone/Pics/404-1.jpg
Vito's Performance raises the engine cubic centimeters to 404
The kit comes with 2 big bore performance ported sleeves designed by Vito, these sleeves can also be used for long rod motors. The pistons are Vito's Power Pistons with dual angle domes and massive intake ports on the skirts, the pistons are matched for the big bore sleeves. The piston skirts are extra thick so they can stand up to the toughest conditions. The Power Pistons use a new lightweight design to improve low end torque, and adds up to 10psi of cranking pressure for faster acceleration and more horsepower. These pistons are designed by Vito and made in the U.S.A. by Wiseco with the best forging possible. The base gasket is a Vito's custom port matched base gasket, and a new head gasket is included in the kit along with new piston pins, top end bearings and clips.
Here are some pictures of the porting work, cylinder polishing and some pics of the installed sleeves and Power Pistons........
http://www.thebansheezone.com/Bansheezone/Pics/404-2.jpg
THE STAIN FINISH WORK
This picture shows the cylinder polishing.
http://www.thebansheezone.com/Bansheezone/Pics/404-3.jpg
This picture shows the installed big bore sleeves... look how thick those sleeves are !!
http://www.thebansheezone.com/Bansheezone/Pics/404-4.jpg
THE PORT WORK
The style that was used in the port job is
"Motocross(MX) style port job "
With the (MX) style port job you can re-shape your ports for all sorts of different power curves, it is designed to take away the "light switch" type powerband found on many modified Banshees and smooth out the powerband, turn it into a killer trail engine with a powerband that is easy to ride yet brutal and with a broader powercurve than the "light switch" powerband. What is a "light switch" powerband !???! It describes a powercurve that is "peaky". The powercurve is like a light switch...... the power was either ON or OFF, making it a fun wild ride, but difficult and tiresome after a long day of trail riding. The MX port job broadens out the powercurve and is designed for fast trail riding and of course.... motocross racing. MXers prefer a smooth "Honda 250r" type powercurve
Intake ports before the port job
http://www.thebansheezone.com/Bansheezone/Pics/404-5.jpg
Intake ports after the "mx" port job
http://www.thebansheezone.com/Bansheezone/Pics/404-6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/404-12.jpg
The cylinder head that was used is a Performance Trixx head which uses interchangeable domes. The smaller the dome cc's the more compression your engine will have. With the new Vito's 404 sleeves you could no longer use the standard bore size domes that you used to run. The big bore sleeves needed "big bore domes". The only really safe dome size for the 404 kit that allows me to continue using pump gas is the size 24cc big bore domes. The Power Pistons can add up to 10psi of compression to the motor
Here is the 24cc big bore dome
http://www.thebansheezone.com/Bansheezone/Pics/404-20.jpg
Ported Big Bore Top End Rebuild
OK, time to put the big bore engine back together.
First step is to clean the case gasket surface for any traces of the old base gasket. The Vito's 404 kit comes with a one piece, port matched base gasket
http://www.thebansheezone.com/Bansheezone/Pics/bigbore1.jpg
In this rebuild ....FIRST insert the pistons into the cylinders , then attach the cylinder\piston combo to the connecting rods. The main advantage of installing the pistons into the cylinders first is the ease of compressing the piston rings and maintaining the rings don't spin out of position. Here's how its done...... starting with the right\clutch side cylinder\piston. Flip the cylinder upside down. Insert the INSIDE piston pin circlip into the piston. Now.... with the piston rings and the "inside" piston pin circlip installed, insert the piston into the bottom of the cylinder, compress the 2 piston rings with your fingers and make sure they don't spin from their marks\notches on the piston. Once the piston is installed past both piston rings, gently flip the cylinder over and make sure the arrow etched in the piston dome is facing towards the front of the engine towards the exhaust pipes.
http://www.thebansheezone.com/Bansheezone/Pics/bigbore3.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore.jpg
OK, now were ****in !! The head is bolted on to the juggs and rear coolant hose is hooked up. New stainless steel head and base nuts holds the new engine together. The head and base nuts are tightened in the correct sequence and gradually tightened to 20 ft-lbs.
http://www.thebansheezone.com/Bansheezone/Pics/bigbore9.jpg
http://www.thebansheezone.com/Bansheezone/Pics/404-1.jpg
Vito's Performance raises the engine cubic centimeters to 404
The kit comes with 2 big bore performance ported sleeves designed by Vito, these sleeves can also be used for long rod motors. The pistons are Vito's Power Pistons with dual angle domes and massive intake ports on the skirts, the pistons are matched for the big bore sleeves. The piston skirts are extra thick so they can stand up to the toughest conditions. The Power Pistons use a new lightweight design to improve low end torque, and adds up to 10psi of cranking pressure for faster acceleration and more horsepower. These pistons are designed by Vito and made in the U.S.A. by Wiseco with the best forging possible. The base gasket is a Vito's custom port matched base gasket, and a new head gasket is included in the kit along with new piston pins, top end bearings and clips.
Here are some pictures of the porting work, cylinder polishing and some pics of the installed sleeves and Power Pistons........
http://www.thebansheezone.com/Bansheezone/Pics/404-2.jpg
THE STAIN FINISH WORK
This picture shows the cylinder polishing.
http://www.thebansheezone.com/Bansheezone/Pics/404-3.jpg
This picture shows the installed big bore sleeves... look how thick those sleeves are !!
http://www.thebansheezone.com/Bansheezone/Pics/404-4.jpg
THE PORT WORK
The style that was used in the port job is
"Motocross(MX) style port job "
With the (MX) style port job you can re-shape your ports for all sorts of different power curves, it is designed to take away the "light switch" type powerband found on many modified Banshees and smooth out the powerband, turn it into a killer trail engine with a powerband that is easy to ride yet brutal and with a broader powercurve than the "light switch" powerband. What is a "light switch" powerband !???! It describes a powercurve that is "peaky". The powercurve is like a light switch...... the power was either ON or OFF, making it a fun wild ride, but difficult and tiresome after a long day of trail riding. The MX port job broadens out the powercurve and is designed for fast trail riding and of course.... motocross racing. MXers prefer a smooth "Honda 250r" type powercurve
Intake ports before the port job
http://www.thebansheezone.com/Bansheezone/Pics/404-5.jpg
Intake ports after the "mx" port job
http://www.thebansheezone.com/Bansheezone/Pics/404-6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/404-12.jpg
The cylinder head that was used is a Performance Trixx head which uses interchangeable domes. The smaller the dome cc's the more compression your engine will have. With the new Vito's 404 sleeves you could no longer use the standard bore size domes that you used to run. The big bore sleeves needed "big bore domes". The only really safe dome size for the 404 kit that allows me to continue using pump gas is the size 24cc big bore domes. The Power Pistons can add up to 10psi of compression to the motor
Here is the 24cc big bore dome
http://www.thebansheezone.com/Bansheezone/Pics/404-20.jpg
Ported Big Bore Top End Rebuild
OK, time to put the big bore engine back together.
First step is to clean the case gasket surface for any traces of the old base gasket. The Vito's 404 kit comes with a one piece, port matched base gasket
http://www.thebansheezone.com/Bansheezone/Pics/bigbore1.jpg
In this rebuild ....FIRST insert the pistons into the cylinders , then attach the cylinder\piston combo to the connecting rods. The main advantage of installing the pistons into the cylinders first is the ease of compressing the piston rings and maintaining the rings don't spin out of position. Here's how its done...... starting with the right\clutch side cylinder\piston. Flip the cylinder upside down. Insert the INSIDE piston pin circlip into the piston. Now.... with the piston rings and the "inside" piston pin circlip installed, insert the piston into the bottom of the cylinder, compress the 2 piston rings with your fingers and make sure they don't spin from their marks\notches on the piston. Once the piston is installed past both piston rings, gently flip the cylinder over and make sure the arrow etched in the piston dome is facing towards the front of the engine towards the exhaust pipes.
http://www.thebansheezone.com/Bansheezone/Pics/bigbore3.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore6.jpg
http://www.thebansheezone.com/Bansheezone/Pics/bigbore.jpg
OK, now were ****in !! The head is bolted on to the juggs and rear coolant hose is hooked up. New stainless steel head and base nuts holds the new engine together. The head and base nuts are tightened in the correct sequence and gradually tightened to 20 ft-lbs.
http://www.thebansheezone.com/Bansheezone/Pics/bigbore9.jpg