Yamaha Vmax VMX1200

THE Yamaha Vmax projects that have been done.

It went from frame modifications to redesigning the driving capabilities and so on and on.

The engine has been changed from Naturaly Aspirated to nitrous, to turbo. All equiped with a Megasquirt (MSEFI) controller for digital fuel injection.

This is an original swing arm.Not suitable for higher horse power then the standard of the Vmax

This is a braced swing arm.
Delivered by Nitromax.This one is tested with 180 BHP on it.Seems to be strong enough for my use.

On the left are the original pivot pins and on the right modified stainless steel ones. These pins are delivered by Henny Raats. The modified pins fit precisely in the bearings. By this modification , the free play of the pins reduced to almost zero. And by this the cornering of the bike will improve.


Remove your footpeg to make some room for removing the cover.
Then loosen all bolts from the cover. Pull the cover towards you. Keep in mind that the gasket can be very sticky.

On the inside you have a bolt which holds the crossed plate on the cover. When removing , use a grip pliers to remove or drill the bolt out of the cover.

When the crossed plate is removed you can make a circle on the cover like on this picture.

Drill a hole near the line you made, the go jig sawing, be sure to have coffee ready because it is a hell to do.

From Perspex you make a cover. It can be 5 till 6 millimeters for the best result for filling the groove. This is also done by jig sawing ( again have coffee ready ). Jigsaw as slow as possible, also the drilling in the cover, too fast will crack the cover.
When the cover is ready, you can drill holes and make some thread in the aluminum cover. I have done it with metric 4, 3 is also a good size but smaller or lager is not better for the looks.

Here is the cover sealed with a silicone mastic and bolted on with stainless steel hex wrench bolts. Be sure before sealing the bolts fit well and the groove and Perspex are solvent and grease free.
This can be done with some white spirit or something similar.
Dry the places which has to be sealed.
When all your work is done and everything goes well, you have a nice Clear Clutch Cover. Homemade and lots cheaper then buying a machined one. How slower you work and give it some time, the better it looks.

Another change, removed the silicon gasket and placed a rubber O ring.
Looks better and works better.
The cover cracked because of the torque of the bolts and no free play.
Now with this O ring it works well, no over tightened bolts and cleaner look.

On the left, the special made nylon solid motor mounts.
Delivered by a good friend.
The solid nylon bushings instead of rubber bushings reduces swaying by the frame and is more stiffened.
By this the frontpart of the bike is more stable in corners and highspeed driving ( no Mr officer, only at the racetrack ;-) )
Here on the right the bushings are placed into where the original rubber mounts were.
Modern motorcycles have  this type of mounting.
Only touringbikes have rubbermounts for eliminating the vibration of the engine.
 This is how your bike looks when modifying to the solid mounts.
Looks awfull this way.
When you want to figtht with your bike for mounting the rear bushings, just buy them and go on ;-).
It is a hell to mount the rear ones.
The result was there today, rock steady cornering and no swing from the frame.

Vmax frame

The Vmax frame is not as good as you know as driver.
Everything was stiffened except this part in the middle of the frame.

Welding in the jigs

Welding in the jigs.


Jigs welded


I made some gussets for the middlepart, here welded on and sprayed with a base coat for steel.


The endproduct is a very stable cornering frame and now i can go safer and faster into a corner.
This is a must do modification.


Bought a NOS kit.

This is what I always wanted to make the bike more complete.


A Vmax can handle this power without modifications to add a 50 till 80 HP

.Here the foggers mounted on the stock manifolds with the rivets.

Sealed with a 2 component epoxy.


This idea to mount the solenoids I have taken from Thomas Powell.

He mounted the solenoids on the battery box and I liked this style of mounting.

The bottle mounted on a right place for a Vmax when you want to take someone with you. Image

Mounted the fuel pump on the right side where the original not used brake mount is.

Made an aluminum plate and placed the pump there, has to be black.

Foggers view below the carburators. Image
Image Foggers are not sticking out the bike much.
The Fuel line, made by a revision shop.
Mounted on the bottom of the tank on the place where the drain plug was.
Also welded a small pillar on it for the water which can be on the bottom of the tank.

Soon to make a Dyno run to see how much gain will be made with this setup.
Image Made the bottle black. Looks much better.