Killer fast 05 Yamaha ZuMa!

[mccanic]

I am starting my build now as im getting better at walking!! :rockon:
my goal with this build is to hit 80mph I think i can do it.
plans are hoca 54mm l/c cylinder, 45mm stroker, and all the goodys to match!

Day after i got it.








The kid i bought it from really beat the hell out of it!:// poor thing lol, well now its in the right hands!

The gooodys! :itshere:







Cylinder



sweet quick throttle!

[mccanic]

Worked on a few things today,
cut the rack for a cleaner look!

little more grinding...

also make a custom jdm tail light lol just waiting on the leases.





just used some jb weld. but first you drill a 7/8 hole.


Much much more to come! ;D

[jmkjr72]

good luck with 80
you got gears and an over range planed in this build to get there right

[mccanic]

oh yah! haha i only weigh 130

[90GTVert]

Glad to hear you are walking better.

I think it can be done as long as you're willing to stick with it and spend time tweaking. I think I was still 275lbs when I did 72MPH GPS on flat ground. Stock gears, no overrange. I think my setup even has more potential. LC should let you push more compression than my AC setup, so there's another advantage. I will tell you now that revving 12,000RPM with a 103cc is not gonna happen out of the box with that cylinder kit. If you get the cylinder to do it, you need a pipe that is meant to do that. 190mech's custom Peace Pipes are the only pipes I know of meant to bolt on to 103ccs that can support that kind of RPM. The other option would be to see just how far you can get with different gears and/or an overrange CVT. I know I couldn't do it that way, but you are also 145lbs lighter than I was last time I tried to get a good speed so you won't need as much power.

Cool project. I like the ambitious goal. Please keep us and ask if you need help!

[mccanic]

i am getting a peace pipe 190mech is building it, probably as we speak. im going to go major porting to the cylinder and case, i think i can do it!!

[2strokd]

This is cool :rockon: . Best of luck with it.

:popcorn:

[mccanic]

thanks man!

[jmkjr72]

wahiduddin.net/calc/calc_speed_rpm.htm

Here's the math problem, if you just want to do it that way:

(0.00595) * (RPM * r) / (R1 * R2) = vehicle speed in miles/hour

where:
RPM = engine speed, in revolutions/minute
r = loaded tire radius (wheel center to pavement), in inches = 9.8 with stock tires
R1 = transmission gear ratio = total final drive, so for 08+, 13.228, and 05-, 14.664, or the ratio you want.
R2 = rear axle ratio = 0.889 at highest pulley 'gear' ratio

with stock 05 gearing it takes 12000 rpm to hit 54
you will need 42/14 to even be able to get to 80 mph
so you will need a ton of power to pull those gears and be able to rev to 12000 rpm to get there without an over range

Attachments:

[mccanic]

i don't need your math problem, ive over come all the problems in planing, this is why im doing it the way im doing it. you just sit back, eat some pop corn and watch!

[mccanic]

update: i was bring my shaddydog engine into the garage to mount the rad and hurt my leg! :/ so there mint be a little bit of an update coming soon, of the rad being mounted.

[mccanic]

got my JDM leases in this morning!

here it is all done :rockon:

[90GTVert]

Nice improvement. :thumb:

[mccanic]

oh yah now im getting rid of them stupid blinkers. well i did to make this tail light lol
thanks man

[2strokd]

Cool! Looks good! Is it getting "killer fast" yet?