it definitely heavy....I'm not sure that i follow you on the weight thing...not sure that it makes that much difference...

Many ppl have installed it and havent heard any weight related problems...

 

I assume that all who installed one, got their original pulleys back.
Were they that heavy as well?
As I said, from the photos from Scootworks intructions, the original pulley seems machined to reduce weight.
My logic is that putting 10 extra pounds on that axel is probably not going to improve things and in general can shorten the transmission life or even break the axel when I hit some pothole.

Am I being too paranoid?

S.

 

No thats actually a good observation. The pulley for the 900's isn't that old so that might be something to let scootworks know about. That could just be something they overlooked when building and designing that pulley. You should weigh the two and find the difference. Having it machined out wouldn't hurt anything, except maybe a return to scootworks. Most places don't like returned parts that are altered.

 

I just send them an e-mail, we'll see what they are going to say.

S.

 

No thats actually a good observation. The pulley for the 900's isn't that old so that might be something to let scootworks know about. That could just be something they overlooked when building and designing that pulley. You should weigh the two and find the difference. Having it machined out wouldn't hurt anything, except maybe a return to scootworks. Most places don't like returned parts that are altered.

if ya have it machined, id think you would want to make sure its balanced, having something out of balance at high rpms is gonna cause alot of vibration and more than likely ruin your wheel bearings

 

I assume that all who installed one, got their original pulleys back.
Were they that heavy as well?
As I said, from the photos from Scootworks intructions, the original pulley seems machined to reduce weight.
My logic is that putting 10 extra pounds on that axel is probably not going to improve things and in general can shorten the transmission life or even break the axel when I hit some pothole.

Am I being too paranoid?

S.

Great Question,....as Kawasaki designed the 900 exactly with the original front pulley in mind, and the motor turning over the correct amount of revs to suit the pulley....wonder what long term damage "if any?" maybe done to the motor.....I doubt if scootworks Put in as much money or time to do full test as what Kawasaki did when designing the 900?....Just my opinion :smile:

 

dang, I was gettin' ready to order one, but now I need to wait to find out about this...!

I just thought of something else, does installing the front pulley from scootworks void your warranty or extended warranty?

 

Great Question,....as Kawasaki designed the 900 exactly with the original front pulley in mind, and the motor turning over the correct amount of revs to suit the pulley....wonder what long term damage "if any?" maybe done to the motor.....I doubt if scootworks Put in as much money or time to do full test as what Kawasaki did when designing the 900?....Just my opinion :smile:

The revs change do not bother me that much, after all this is what I am trying to change and people do this to chain bikes as well.
But the extra weight is bothering me a lot as an engineer.

S.

 

The revs change do not bother me that much, after all this is what I am trying to change and people do this to chain bikes as well.
But the extra weight is bothering me a lot as an engineer.

S.[/QUOT


The weight thing would be a real issue for me, I run Larger tyres On my 4x4 and Ive had to Change the wheel Bearings due to the added stress {over time} to the Bearings ......so It would be Interesting to see what will happen after awhile to the shaft bearing that the pulley sits on

 

I would think that as long as the pulley is balanced, with no wobble issues it wouldn't matter to the bearings how much it weighs (within reason). I'd guess the higher weight would very very slightly affect the clutch plates and reduce performance by a very small factor when getting it spinning from a stop. Not an engineer by any means, but mechanically inclined and I think you're over-estimating the impact. I don't own one or plan to get one.
Please don't modify one as you will definitely wobble those bearings to pieces.

 

My husband (automotive and bike repair tech.) said that if the weight difference isn't a lot it would cause no damage, but if it was a lot it could cause some damage to the output bearing. He said that would be expensive to repair, but the chances of any damage at all if riden responsibly is minimal if any.

He also said it would not cause damage to the motor at all (concerning the revs etc.).

 

Thanks to all feedback. I am planning to talk to my local Kawi dealership as well and see what they are going to say.

Another thing to ponder related to this - the belt itself pulls pretty strongly as well, I guess that bearing/axel is designed to handle some forces in there.

S.

 

My husband (automotive and bike repair tech.) said that if the weight difference isn't a lot it would cause no damage, but if it was a lot it could cause some damage to the output bearing. He said that would be expensive to repair, but the chances of any damage at all if riden responsibly is minimal if any.

He also said it would not cause damage to the motor at all (concerning the revs etc.).

Hi Amy,

What would be "a lot of weight difference" -is let say 18 pounds vs. 10 pounds a bit difference?

S.

 

I'd bet there is much more pressure placed against the bearings by the drive belt than the few lbs of steel added. Many times steel parts are made hollow not to keep weight down, but cost. Steel is becoming very expensive.

Add the gyroscopic effect and I don't think bumps will hurt it at all.

How hard is the vibration you get at 75ish on the bearing? Most use the pulley to relieve that stress.

I'm getting one for the wife's ride as soon as my pockets feel fuller. Weight shmaight

 

Hello Somerset I saw you post after I posted mine look for scootworks pulley problem.

 

You would think that if Scootworks did any engineering on the pulley at all during the design phase they definitley would have taken the weight and balance of the unit into consideration. Then again who knows??

 

You would think that if Scootworks did any engineering on the pulley at all during the design phase they definitley would have taken the weight and balance of the unit into consideration. Then again who knows??

i dont know if i would count on that logic, considering how many products are recalled now days... not being a smart a$$, just sayin....

 

Get the weight of the stockpulley and the scoot works pulley before perplexing yourself with an assumption.

If the pulley does weigh more than stock, it would increase unsprung weight. Unsprung weight is like adding weight to your bike through the means of a rotating object weight increase.

An out of balance pulley would have a damaging effect, a heavy pulley wold not.

 

Don't think there is an issue here. While I didn't weigh them for comparison purposes...I believe they are similar. The stock pulley is solid steel - as opposed the the scootworks pulley, which is aluminum/alloy and has a steel center gear insert.

 

I'm not worried in the least bit. The pulley has worked flawlessly and I haven't noticed any problems with the hills I have around my town. I read in the OTHER pulley thread a guy was worried about having the pulley on his bike with his hilly area. I can appreciate the relative flatness of Kansas compared to that of the more mountainy terrain. I believe I would down shift when necessary. The 900 will run 90 in the 4th gear all day long so you ought to be able to get up a hill or two.

 

I can't really say that, I haven't had the 900 doing 90 in 4th gear for a whole day so technically thats an exaggeration. I did have it doing 90 in 3rd last week for the better part of 5 minutes though and only shifted back down to 5th after a longer period in 4th when I thought I had shifted to 5th. It was busy on the highway. Grooved pretty good though.

 

pulley weight

I have a scootworks pulley I haven't installed yet. It weighed in at 3.7 lbs on the scale at the post office. Don't know what the stock weighs since I haven't pulled it yet. Maybe someome can weigh one that they took off.

 

My imprecise measurement yielded around 4 lbs for the stock pulley. So it sounds like they are roughly the same.

 

Stock is 3 pounds 6 and 3/4 ounce on my digital kitchen scale.

Whats up boys. That's like three threads this week just about bashing scootworks. Is there something going on? Somebody got a motive to their madness or did the moons just line up on the wrong side of Scootworks bed?

 

I'm convinced. Where's the best place to get one? Or do you have to get them directly from Scootworks?