What is the 490 origanly from, an old bike? Sounds like a great sleeper, and alot of fun.

 

probably an old YZ, but i will let him answer that, I know they was a yz490 maybe in the 80's???? let us know...

 

As the signature says, it is a 1984 Yamaha YZ490 dirt bike engine. Back in '80, yamaha made a 465 and then punched it to a 490 in 84. Around 86 they made it water cooled, which helped power more. Every one of these motors were VERY powerful. When it was stock and in the bike, a twist of the throttle in 5th (high) gear would yield wild wheelies. Top end with my gearing was found around 95 mph! I know it would pull the front tire at 70 mph. I can't find the exact weight of the engine, but I would say it is only about 10lbs heavier than a blaster. It has only 5 gears and no oil injection. As I said, the exhaust will be fun. The headpipe comes out at an angle, and will have to be turned back forward to miss the frame. Most of the stuff I build is for the shock factor. I love to see the look on people's faces when they see some of my projects. Here is some of the things I have built in the past five years (I'm 21 now).
Whizzer minibike -1.5hp briggs from factory -installed 360cc, twin cylinder, 6-speed, honda streetbike engine. looked good, had highwaybars, electric start, Shriner's envy
Go cart- first had 350honda, then came CB650, then 650nighthawk, and finally a twin cam 750
When the CB 650 came out off the cart it went into a lowered 250r frame- too heavy for the suspension.
225 yamaha moto-4 with a 1000cc v-twin yamaha streetbike engine. Yes, it really was in there. I wish I had pictures. ATV and bike were shaft drive, had to have custom shaft made. Had exhaust custom bent. Way too fast. Had it together about 2 weeks when it dropped a valve and I got rid of the engine.
I've done the 200s into a 200x frame and also a 250x into a ATC250r
Everyone remembers the ford pinto, right. Try driving one with a alminum headed, solid roller cammed, 302 small block in it. One of the scariest things I have built. It would haze the tires at 55 mph.
I also have a 68 ford longbed truck with a solid roller 521 big block stroker (dynoed at around 700hp on pump fuel, and have a 300horse spray on top of that). I love playing with rice burners.

Anyway, I am glad someone finds this swap interesting, since that is the main reason I am doing it. I will be sure to get pictures of this one. If I can find the pictures of the past projects, I will post them in my sig.

 

Sorry I did not catch the 84 in the sig. that is my bad, sounds like you have sone some sweet stuff man, keep up the good work!!!!

 

If your friend has 4000 to spend then he could get a used 400ex. Promlem solved.

 

If i had $4000 for a used bike I would get a used 250r.

 

Dident the old IT490's only have 4 gears???U call it a yz490,either wat dident it only have 4 gears,u are saying it has 5,i think u are fibing somewhere along the line[img]i/expressions/face-icon-small-wink.gif[/img][img]i/expressions/face-icon-small-confused.gif[/img][img]i/expressions/face-icon-small-shocked.gif[/img]

 

Okay, so you caught me. It is an 84 YZ490 topend on a YZ465 bottom. The crank bearings went out of the 490, so I found a 465 bottom to put the ported cylinder on. It has 5-speed. Why yamaha went to 4-speed AFTER 5 is beyond me. Sorry about the confusion, but it is easier to say it is a 490 because most people won't catch the difference. Anyway, I can't wait to see in in the bike.

 

See most people think i dont know that much because iam only 15,BUT let me tell u i know my bikes ,as u can see[img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img]

 

<< See most people think i dont know that much because iam only 15,BUT let me tell u i know my bikes ,as u can see[img]i/expressions/face-icon-small-smile.gif[/img][img]i/expressions/face-icon-small-wink.gif[/img] >>



Dont know about you but I saw it in another post, oh.. about 2 days ago LMAO