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Post by albertabeef on Jun 10, 2024 18:53:50 GMT -5
So I'm not sure what the issue is here. I bought a Polini Hi-Speed variator and went to put it on, but couldn't get the variator to come off. I ended up having to use a puller to get off the fixed sheave, and it ended up bent... I had to order a new one, but figured, OK, whatever. So the new one has arrived and I just went out to pull the rest off, and while the primary/sliding sheave came off, I couldn't get off the collar or the cam. The collar slides to the outer edge of the crankshaft and ... just stops.   Anyone have ANY ideas what's going on here? Am I hooped? I feel hooped... LOL. |
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Post by aeroxbud on Jun 11, 2024 3:18:47 GMT -5
It looks like the nut has come undone at some point, and damaged the splines. You should be able to dress them up with a small triangle file.
Go slowly and only remove the minimum to get it off.
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Post by 90GTVert on Jun 11, 2024 6:08:30 GMT -5
This is actually pretty common. If the splines get messed up at all, this can happen. Look it over closely and see if you can feel spots that are raised but shouldn't be or are out of shape and do a very small amount of filing and test and file more and test as needed till the collar can be removed and installed normally and the fixed half fits.
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Post by Zino on Jun 11, 2024 7:27:20 GMT -5
this happens when you don't slack the belt before tightening the variator down .
the variator then wobbles and aluminum from the variator fills in the splines .
some diamond files can clean this right up
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Post by albertabeef on Jun 11, 2024 17:15:04 GMT -5
Y'all are incredibly helpful. I didn't have any triangle files so went to Home Despot and picked up a couple. I worked very slowly one spline/groove at a time, shaping a bit and then got the collar and inner sheave off. I then tested the fixed sheave to see if it'd fit - but it wouldn't, so I kept shaving until I could get the fixed sheave to get onto the splines... Once it would slide on without binding I pulled it off and installed the new Polini Variator and got everything all buttoned-up properly. I will admit it was a LOT of slow, methodical work while lying on my side on the driveway, LOL, and my back isn't happy, but it's all working and I only needed a $7.59 primary sheave from Partzilla and a couple files from Home Deespot to get it all working properly. Thanks All! Here's the ride stats on my first post-upgrade ride with the new variator. Previously I couldn't get the GPS speed to ever register above 60kph (37mph) but hit 76kph today (47mph) so that's a considerable improvement! It also gets up to normal operation speeds (50kph/30mph) much quicker. It's working GREAT now, thanks!  |
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pili
Scoot Enthusiast
Posts: 278
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Post by pili on Jun 11, 2024 18:14:55 GMT -5
I like to get the belt down in the bottom of the rear pulley to give you more room to slack it up front. Sounds like you got it sorted, good job.
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Post by albertabeef on Jun 11, 2024 19:05:04 GMT -5
I like to get the belt down in the bottom of the rear pulley to give you more room to slack it up front. Sounds like you got it sorted, good job. Yeah, that part was easy enough - I saw enough videos on upgrading the variator that I knew to squeeze the clutch to get the slack in the belt. That wasn't my issue - my issue was just one example of what to watch out for when buying a used scooter, LOL. I'm glad I got it sorted, too. Honestly, it was minimal effort - just time-consuming because you want to be as meticulous as possible. And I had to wait a while for the fixed sheave part to be sent - that took 11 days...  |
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Post by albertabeef on Jun 11, 2024 22:52:12 GMT -5
OK did another ride later tonight, definitely faster on the downhills:  |
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Post by GrumpyUnk on Jun 13, 2024 8:01:29 GMT -5
The one thing about the splines is that if you cannot get them cleaned up so the variator can engage.... you get to replace the crankshaft. Slow and meticulous and paying attention or you get to pop for a big chunk of change.
80kph... 48-ish mph. That seems about as much as you need for such a short wheelbase machine. The shorter the wheelbase, the harder it is to keep them going straight when going fast. A Jeep his a bit more twitchy as speed increases, while a long wheelbase SUV will be a lot easier to keep on track. FWIW.
tom
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Post by snaker on Jun 13, 2024 10:00:04 GMT -5
I'd be curious to see the hardware that you stack up on the shaft end outboard of the sheave.
Could you line the pieces up in the order and the orientation that you install them and take a couple photo's?
The first piece, does it but up against the shoulder of the shaft or does it slide over the shoulder and but up against the spline ends?
Show a clear, zoomed in photo of that piece, inboard side.
And also with that piece slid onto the shaft up to the point where it stops.
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