Hefe'z YFZr from 450 to 700

[Hefe]

50 HP Peels?

[Alkire193]

Turbo 804cc 450 framed nitro quad 

I never saw that lift at harbor freight, how do you like it?

[Lady4Fiddy]

  ... oh wait I did! 

[Peelz]

50 HP Peels?

Uh, no.  I mean not far behind being alive in 1955. Come back and get me mcfly!

[Adam]

Maybe a small fci type of adapter from the throttle body that angles up to clear that sub frame cross brace to fit a little bit of a wider filter. Not sure about the seat clearence issues.  Or vise versa one that points down for a longer filter that goes parallel to the rear shock...... Just been thinking. An intake solution is prob what's keeping ya from breaking 70hp...

[Hefe]

Love the lift..
and intake or not, Barkers stage 2 with just a piston makes 65-68 HP all the time..
it is right on par for a "normal" 700 build the way I understand

[russ-russ]

I'd say you're right where you should be for HP Hefe.  Add an ignition and a +2 or +3 throttle body and you are 70+ for sure.  Without those two parts, you haven't unlocked your build's potential completely.

[Hefe]

yep, I was thinking that too
hopefully by spring the MSD will be more readily available and much less expensive, maybe I will pick one up.
throw a new piston in it (slightly higher compression) and a bigger TB and secure a place well into the 70's

the lift..
http://www.harborfreight.com/1000-lb-capacity-motorcycle-lift-91764.html
I dind't pay that much for it though

[phucker]

all of this because i was drunk at little sahara in 09 and said "phuck it you need to stick a 700 engine in that thing"

[Peelz]

all of this because i was drunk at little sahara in 09 and said "phuck it you need to stick a 700 engine in that thing"

so much happens because you are drunk....

[dragonz]

Hefe,
Once I finish the current build of my 660, I am then going to do a build on a YFZ also.
However, we are going to use a slightly different motor, & will be in the 110+ hp range, but still light-weight.
What motor I hear you ask? A mildly built RG500...............

What I was wondering was how you got on with swingarm length?
Are you running a stock length, or wherer are you at with that?
The RG I think will need to go longer than stock, but I'm not sure where to aim for & just wondered what you thought based on how your YFZ700 goes?

Thanks

Phil, aka Dragonz

[Hefe]

we just used the stock swingarm
seems to be just fine
we thought it migh be too much of a wheelie popper, but it seems good

[dragonz]

did you weigh the 700 motor?
or have you weighed the entire bike?

The RG motor is only a little heavier than the 450 motor (must get an actual weight difference) but will easily double the Hp

[Hefe]

no, I have not weighed it at all

[Troy31]

  Nice!