R6 cam in the FZ6

[bossdoc83]

Is it possible? Has anyone done it? I've done some quick searching and haven't really found anything....

Why do I ask or why not get an R6? Well because I love toying with my toys! Also, sleepers (for you old schoolers ) are the best!

[Hellgate]

Originally Posted by bossdoc83

Is it possible? Has anyone done it? I've done some quick searching and haven't really found anything....

Why do I ask or why not get an R6? Well because I love toying with my toys! Also, sleepers (for you old schoolers ) are the best!

Gotta love a sleeper!

That idea has crossed my mind too, however I wonder if the intake system would allow you to get benefit out of the change? From what I understand, the R6 has some type of an intake run length changing system and a different FI system. (Yeah I'm sure Yamaha has a four letter acronym for it...) I would think with the PCIII and a good tuning session you could get some nice peak power out if it.

Another change that would be fun to play with is the J&E 637cc piston kit. That kit is a +2 on the bore.

JEPistons.com | Powersports - Street

[bossdoc83]

I would think that the cams should work since having the PCIII makes the FI tuneable, right? Having said that, getting a tune is no prob but the fitment is my concern. Granted the FZ motor is the down-graded R6 but to what extent? Or am I just over-thinking?

To my knowledge, I should be able to drop in a set of cams and be good to go, except for tuning of course and any bugs that may come along.

Now for the pistons....he he... Not sure I'm gonna get that crazy just yet but... very tempting!!

[Hellgate]

Well I wonder if the heads have the same port shape/size at the R6? If they are smaller they may not flow the additional air and fuel correctly...

What do you think?

[bmccrary]

Originally Posted by Hellgate

Well I wonder if the heads have the same port shape/size at the R6? If they are smaller they may not flow the additional air and fuel correctly...

What do you think?

+1.

Now your getting there. It would involve alot more than just a cam swap. You would need to figure out what the FZ head flows first in comparrison to an r6 head. In addition you will probably need the springs out of the R6 as well.

you can throw alot of lift at it to let more air in, but if the motor doesnt need it, then you wont get anywhere with it. You will have wasted your money. At some point I would love to throw my head on the flow bench here at school and see what she does, but that will only be if I have to.

If you have some extra time and access to a flow bench and can get ahold of an r6 head as well as a FZ head. It would be worth your time to see but probably not worth the money.

Not sure how much experience you have with cams and motors and such. I was just giving some basic info there. Didnt mean to talk under anyone on that if they already know such info.

This is a neat video on improver valve spring/cam set up.

YouTube - Valve Float

-bryan

[wolfc70]

Actually our motors are based off of the 03 and 04 r6 motor. The YCCI (Yamaha Chip Controlled Intake) I think was first introduced in 2006. The R6s is virtually the same engine as that older r6, just with different fuel injection. I think the cams would bolt right in. Of course I would also put in r6 valves and springs just in case there are any differences. I would find a junked 04 r6 (should be easy considering the rate people crash these things) and take some measurements with the micrometer to make sure bearing sizes are the same and measure the cam lift just to see if there is any difference. There is more than just cam profiles involved with increasing volumetric efficiency. A r6 motor may just bolt in too.

[dako81]

I'd really doubt if the flow would be much different between the two heads. Not like they designed a completely different motor for our bikes. Not sure the valve springs would be different either. Maybe someone could look up the part numbers in the yamaha parts cataloge thingy?

[bmccrary]

Originally Posted by dako81

I'd really doubt if the flow would be much different between the two heads. Not like they designed a completely different motor for our bikes. Not sure the valve springs would be different either. Maybe someone could look up the part numbers in the yamaha parts cataloge thingy?

I am not sure either. But I figured I would throw it out there just incase. I doubt yamaha made a different mold for our head, but you never know.

Just something to check.

-bryan

[bossdoc83]

So I've been doing some research and got a quote from my buddy at a yamaha dealer. He told me for both cams, inner and outer springs that the price tag is almost 6 bills brand new! OUCH

Next I'm gonna check out some wrecking yards or something and see what I can come up with. One thing I am wondering is break-in. Whether new or used, what kind of break-in is needed, if any, before being good to go?

I still haven't got around to checking dimensions just yet but I plan too as soon as I get some more spare time....

[urbanj]

thats not that bad. Some people spend almost double that on an exhaust and PCIII. Break in like anything else. slap a bunch of assembly lube on the lobes and journals and break it in gently for a couple hundred miles.

I'd like to see someone actually measure the cam specs of both bikes first.