YZ440 hybrid??

[blue416ex]

what parts EXACTLY will i need to do it if i have every part could i do it in a weekend? how hard is it? and how much will this conversion cost me as a total ? what are STRONG 416 ex motors going for? and the entire electronics system? im just looking to get some info on the conversion ...

piks of steps of the conversion will be helpful also thankx

[EvilJester400EX]

You'll need a radiator, oil tank, engine, engine mounts, welding this and that together, and probably a few other things.

[bakeen]

Why on earth would you want to put any Yamaha engine in a Honda?

[ss440ex]

I f you had a complete kit and have done it before,,,Maybe!!
I have done several,and a week end would be very tight.

You would need a welder.
Two spacers are needed for the rear eng mount.
A .097 shim and a .240 spacer.
Fwd mounts.
Oil tank or a dry sump system,250r radiator
Coolant adaptors from eng to rad.
Rad mounts ,oil tank,and eng mounts,welded in.
A kicker extension.
Relocate coil.
A air filtering system.
Hoses and oil lines.
Alot of work, but WHAT A RIDE!!!

I like the yz 426 engines.


pm me and I can send pics.

[YZ400EX]

You would never be able to do this in a weekend if it was your first time..

[blue416ex]

yea this wuold be my first time doing it, which motor mounts line up without modifications (welding) i know the front lines up with new mounts and the swingarm but wich others do you even use the bottom motor mount?

the radiator- will a stock 250r radiator work or do i need the GT thunder one? are there any other radiators that could work? banshee, lt250r?

welding-what exactly need to be welded ? new motor mounts?

intake- what works? a YFZ system?

what should the totalk cost me like an estimate?

what are strong 416 motors that have pretty much everything going for these days? about 1300??

im just scoping out the project i probably will do it

i've heard of people needing 1.25 inch longer swingarms why? does the motor have too much power for a standard swinger?

also since the motor isn't counterbalanced does it vibrate the quad apart?

and i pmed you about those pics you have ss440ex

how hard is the project?? compared to doing a total rebuild on a quad ?

[EvilJester400EX]

Stock 250r radiators will work. If you are talking about building a 416 from stock a good one at nationals is probably $1800. A +1 1/4 swinger would help, and the motor will not vibrate too bad at all, it'll be just like a YFZ. Hopefully more can chime in about your other questions.

[YZ400EX]

You can use a stock 250R rad or any aftermarket one..aftermarket would be better, but the stock 250R is cheap and can always be replaced later + it does the job..I would stick with Honda 250R radiators only though because it is known that they fit and the mounts you will get are for 250R radiators..

The front motor mounts just bolt up and the rear mount where the pivot bolt slides through the motor you need to have a bushings that goes in the motor because the EX pivot bolt is too small and would be floppy..you will also need a spacer that holds the engine to one side on the bike because the yz engine sits a little to the left in the ex frame. You will also need to weld in, upper and lower motor mounts, radiator mounts, and oil tank mounts.

Intake..I used stock 400ex airbox, a radiator hose from NAPA..I can explain more in detail later, but nothing from a YFZ is needed..use whatever comes with the yz motor you get as far as carb forward.

Now you will have to have an exhaust setup for this bike as well..I used a header off of a YFZ 450 because it seemed to clear the rear shock rezzie a little better then the stock YZ400 header I had..maybe mine was bent?? You can also use the silencer part of the exhaust that you have on the bike now, but will have to have a custom midpipe to have the headpipe and silencer meet up.

It really depends on how much you can get your motor for to really estimate how much this project will cost you..

To sell your 416 motor you might be able to get around $800-$1000 out of it, but maybe more..Thats a reasonable price though..

If you are talking about buying a YZ motor you might find one for less than $1300 you may find one for more..Just look around really..

As far as alonger swingarm it would be a good idea, but not totally needed..With this motor it does make the front end of the quad alot lighter then it did with the ex motor #1 because it has alot more power and #2 because the motor is much smaller and lighter..An extended swing arm is a good idea, but not 100% needed..it can come later if needed..

About the quad having alot of vibrations..Mine doesnt seem to vibrate much at all..at certain RPM's when just letting it rev it kinda vibrates, but while sitting on the bike, running it and riding it, its not bad at all..If you did this swap you would be more than happy with it..

As far as how hard the project is really depends on your skills and knowledge as to how things work, go together, really how mechanically inclined you are..to be honest if you have any doubts about yourself being able to do this, dont even start because it will never get finished..It is not easy the first time you do and will take some figuring out on alot of things, but if you can get through the first one you could do another easily, but honestly if you have any doubts yourself being able to do it, dont even start it because it wont get finished..

[ss440ex]

Could`nt of said it any better!
They are fun though

[blue416ex]

im not really having DOUBTS about being able to do it it's havibng the money to do it im a little short on cash until i get a new job for the summer ( im only 16) but im pretty mechanically inclined i rebuilt my old blaster, banshee, and now my 416 almost from the ground up i redo topends and everyhing so i would say im up to it

another thing the chain does it line up or do i need to cut the frame and move the tube over? and on the pivot bolt what do you use as the spacer? does anyone sell them?

and what do the kits usually run just to save some time from making everything from scratch?

thankx to everyone who replied in the thread its been a TON of help in deciding what i am doing with my bike as far as selling or making it a hybrid