Aftermarket variator

coolbeans · Post by **coolbeans** » Tue Oct 28, 2008 10:25 am

As indicated elsewhere, the Aero 50 draws air into the fan and over the engine, not the opposite as you say. Sorry, but I know this is true from direct observation.

mosesdude7 · Post by **mosesdude7** » Tue Oct 28, 2008 1:56 pm

First of all, I know this for a fact because I recently had my scooter apart to install a new variator, and because I have a bachelors degree and a masters degree in mechanical engineering. But don't take my word for it. All you have to do is look at any of the repair manuals from the Tech Docs section. In each manual, section 9 starts with a detailed view of the final drive reduction. The Aero and Elite both have a driveshaft, countershaft, and final shaft. The drive shaft rotates the same direction as the motor, the countershaft reverses that rotation and the final shaft reverses it yet again so that the wheel rotates the same direction as the motor. Since the wheel rotates clockwise when viewed from the right, this means the motor also rotates clockwise when viewed from the right. On the Spree, the final drive reduction consists of a drive shaft meshed directly with the final shaft. This means the motor rotates counterclockwise when viewed from the right, opposite the direction of the wheel. Accordingly, the fin orientation on the Spree cooling fan is opposite that of the Elite and Aero. Now all one has to do is look at the detailed picture of the fan at the beginning of section 7 of any of the tech docs and use simple logic to determine which way the fan will direct air when fin orientation and direction of rotation are taken into account.

ALOW1 · Post by **ALOW1** » Tue Oct 28, 2008 2:25 pm

mosesdude7 wrote:You do know that on the Spree, Aero, and Elite, the cooling fan actually pulls air from up underneath the seat, around the cylinder and blows it out through the fan shroud on the side, right? That's why each of the two rear body panels has three little intake vents near the floor of the scooter. That's also why the fan shroud has a baffle on the FRONT of it. All you have to do is look that the direction of the fins on the fan to see this. And maybe I misunderstood what you meant by "a scoop that directs high pressure air into the cooling fan" but if that scoop is directing "high pressure air" INTO the black fan shroud on the right side of the scooter, it's either not doing anything or it's probably a good idea to remove it before it causes your motor to overheat.

wrong

SpyderMike · Post by **SpyderMike** » Tue Oct 28, 2008 9:39 pm

or or or

you could start your scoot, and hold a piece of thin paper in front of the fan and see what way the wind blows....just a thought

scooterwerx · Post by **scooterwerx** » Wed Oct 29, 2008 12:35 pm

well mr education, have you put your hand up to the cooling air intake to actually feel which direction it flows? hmmmmm

scooterwerx · Post by **scooterwerx** » Wed Oct 29, 2008 12:44 pm

good god, education is overrated. a masters degree and he still cant figure out scooter cooling systems??? i guess you cant polish a turd. engineers do so love to over-analyze things i guess. i just went out, started my aero, and held a piece of paper up to the cooling intake. guess what? it sucked it in. oh my gawd.

evilone · Post by **evilone** » Wed Oct 29, 2008 6:41 pm

I held a piece of paper up to mine and it blew it away from scooter.

Dac · Post by **Dac** » Wed Oct 29, 2008 6:49 pm

evilone wrote:I held a piece of paper up to mine and it blew it away from scooter.

what type of scooter?

evilone · Post by **evilone** » Wed Oct 29, 2008 6:58 pm

I found out that was the tip of my muffler not the intake! Thank god for the manuals!

evilone · Post by **evilone** » Wed Oct 29, 2008 7:02 pm

Dac, I was trying to get scooterwerx worked up. LOL

Dac · Post by **Dac** » Wed Oct 29, 2008 7:02 pm

evilone wrote:Dac, I was trying to get scooterwerx worked up. LOL

lol, you had me going there for a second.

scooterwerx · Post by **scooterwerx** » Wed Oct 29, 2008 11:20 pm

haha sorry, i get worked up when people think that their education is the end all be all. "its wrong, but i say its right and it is cuz i have a bachelors and a masters and my head up my *" all the education in the world cannot replace common sense. or maybe there is some sort of reverse rotation scooter, it is a honda after all!!

evilone · Post by **evilone** » Thu Oct 30, 2008 6:24 am

I agree on the common sense statement 100%!!

Post by **noiseguy** » Thu Oct 30, 2008 11:10 am

and because I have a bachelors degree and a masters degree in mechanical engineering.

Being the proud owner of an MSME, you should understand the value of empirical evidence over theory. Right? You've got at least 5 people with empirical evidence tell you that you're wrong. When will you review your own theoretical assumptions?

I get really suspicious when users wave around qualifications when faced with contrary evidence. Insight for you: Most people just don't care about your academic qualifications after the interview; it's all about delivering value. Which is why I don't bring up my academic qualifications or prior industry background, which are substantial themselves. It might lead people to think that I'm qualified to guide them, when I'd prefer to be challenged. It keeps my brain nimble.

mousewheels · Post by **mousewheels** » Thu Oct 30, 2008 2:30 pm

I found a link explaining centrifugal blowers. For forwards and rearwards angled blades, the blower still sucks in from the middle and exhausts at the periphery.

Forwards curved blades may look like they don't work well, but apparently create a larger volume of air for a given blower size and speed. So that forwards leaning blade is the optimized the blade for cooling. And it sucks air from the blower grille side.

http://www.yaskawa.com/site/dmdrive.nsf ... VAC.02.pdf

P.S. Nice discussion, there's not a part on the Spree for which learning cannot occur.