Nova Cluch shoe replacement problem

[ShiftPoint]

Hi,

I replaced my shoes with Nova shoes on a XSS 4.6, 17 tooth vented CB, I also used the MUgen springs and pilot nut.
I assembled it exactly as in the picture below, with one exception. I did add the washers that came with the nova shoes.

Ok when I titen down screw Z517 the CB locks to the crank, it doesnt spin on the bearings freely anymore, when I loosen it the CB spins very smoothly on the bearings. Even when I tighten the screw by hand, very loose but all the way in. when I loosen it it spins again.

My first thought was it was the washers. I can see down in the CB and look at the top of the shoes, even when tight there is about a 1/32nd gap between th shoes and the CB, so I am pretty sure it is not the washers.

Any ideas? is this normal, (it doesn't feel normal)

thanks.

 

[ShiftPoint]

Hi,

If I add another washer tempoarily that is about the same thickness of the 3 nova washers where the Z694 is, that would tell me whether or not it is the nova washers causing the top of the shoes to rub the CB, correct?

If it is the nova washers, do you (anyone) think it would be better to remove the 3 novs washers (meaning going through putting those shoes back on) or could I just leave the extra washer on on top of Z694?

thanks

 

[MTBikerTim]

In my setup where i used the nova washers I added an extra z694 in the same place, as my clutch bell needed to be moved forward to mesh correctly and I had play anyway. When you do up the screw are you able to move the clutch bell backwards and forwards slightly. You should be able too ever so slightly. You can also try removing the z694 and see if that helps.

 

[Blazer X]

I would guess the mugen nut is slightly longer than stock and is causing the interference. I have ran into that before. If you can take it off and check the ht. of each one. You can also take a little off of your collet behind the flywheel to create clearence. :jamout:

 

[ShiftPoint]

Tim,

I can move it but it is like the clutch is engged or should say when I move the CB the flywheel moves also when tight, it should spinn freely of the flywheel.

thanks for your suggestions. I will try adding a washer where the z694 is and see if it helps. Probably if tat works I should remove the 3 nova washers, I have a feeling that may be it.

 

[ShiftPoint]

It is definitly the mugen nut is longer than the hpi nut. So what is happening is the last screw that goes in is hitting the bushing before the shaft and putting pressure on the bearings.

I can get it on if I remove the z694 washer with a little play (too much I think) but then the top of the shoes do rub on the cb. I guess I am going to have to either tighten the mugen on a bit more (don't think it will go futher) or taKE SOME MATERIAL OFF THE MUGEN OR BUSHING. (sorry about the caps)

what to do.

 

[ShiftPoint]

Here is a photo of the Mugne pilot nut next to the HPI pilot nut, you can see the difference.

I don't know why this is causeing some of us problems and not others, must be some difference in motors.

 

[Blazer X]

Yep just as I suspected...take some off the tapered side and should be ok.

 

[ShiftPoint]

Yep just as I suspected...take some off the tapered side and should be ok.

Exactly what I did, didst have to take much off. I was able to do it with some 320 grain sand paper. works perfectly.

thanks

BTW a way that made it a breeze to get those springs on, I temporally put the metal bushing on so it was sitting on top of the mugen, this way there isn't much of a lip to get the spring over. very easy.

 

[Blazer X]

glad everything panned out for you...

 

[Jeremy]

That's why I never used the little washers that came w/ the shoes

 

[ShiftPoint]

That's why I never used the little washers that came w/ the shoes

SJ, Actually the washers weren't the problem, well they did get in the way of an easy fix, maybe,? If I would remove the z694 washer and the 3 washers it would have gone together, but then the bearing next to z694 would have been hitting the pilot nut in a bad way.

the real problem for me with the parts I have was the mugen pilot nut, even if I remove the shoes and assembled the rest when that last screw tightened just a little the CB was trying to turn the flywheel. what it was is when you put the last bushing on the bushing was higher than the shaft so the last screw's head put pressure on the bushing which put pressure on the bearing.

I think it would be really hard to understand what I am talking about if you haven't taken one apart recently. It was the nut. I don't know why some have problems except it must be some small difference in the motors, I was putting this on a HPI K4.6, I will be doing a F4.6 soon it will be interesting to see if I have the same problem, I guess it could be a difference in the nuts too????

thanks for your review, it helped a lot on deciding where to put the weights (or to leave them off🙂 ) and I do see where the HPI pilot nut would have not worked, well you can tell in the pic's on the first page of this thread.

 

[MTBikerTim]

Really it was a problem with the bushing. The bushing is there to take up the extra space and was probably designed to work with the stock nut. The bushing is just better at taking up the space then using a bunch of washers.

 

[Crash]

good info here thanks guys.

question about nova shoe setup / are you guys useing the weights ?

if so what setup are you useing ( weights)?

 

[formiko]

I put the weights in the hole closest to pivot. Wheelies constantly, even with a crappy tune.

 

[Crash]

Is it ok to run with no weights?

how would this effect the way the shoes respond?

 

[Jeremy]

:dark: :dark: :dark:

Is it ok to run with no weights?

how would this effect the way the shoes respond?

Crash .. It's in my nova review .....

 

[Crash]

ok thanks.................