Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
What is the weight in grams of the 967 weight (417224225)?
Including an unloaded bolt and clicker assembly? (ie weight ready to install on axle pin)
.
So, on a 967 weight with standard pin... you have to figure about 74 grams for the weight (the eccentric is part of the pin assembly and not a factor IMO).
With that kind of weight, and the lower RPM of this engine and the super stiff primary spring.... seems to me that the primary will have a lot of "authority" over the secondary...and back shifting will be difficult for the secondary to pull off well....
With the possibility of Putting a lot of frictional load on the belt and generating a lot of heat.
IMO, a bit lighter weight and lighter spring in the primary would go a long way... you can still keep the Engagement etc balanced and lower the energy from the stock heavy/heavy spring/weight combo in the pDrive.... and give the secondary more of a fighting chance to keep clamping forces on the belt up.
The pdrive weight does change its curve essentially as you change the clicker position. Although the axle is fixed the cam essentially gives it 5 different axle locations so the statement of it not changing the profile is incorrect. Your one diagram even shows the profile changing as the clicker changes ( essentially giving you 5 different profiles in one weight. The bolt in the center of the pdrive weight( changed for weight corrections) is the fixed pivot with the tip and the base both moving up and down ( like a seesaw) as the clicker is adjusted.To me... the term "Ramp" is an outdated carryover from the TRA that does not have any application to the pDrive Clutch in the 850's, IMO.... and confuses things more for the end user to understand in discussions.
Cam, flyweight, or just 'weight' IS a better description of the part.
You would actually have to change the weight to one with a different curve of the face of the weight, that contacts the roller, to do the same thing as a clicker adjustment of the TRA.
The TRA clicker actually changes the Ramp inclination.... whereas the clicker on a pDrive, the weight still pivots on the same axle location regardless of the clicker position; the pDrive weight will never change in terms of inclination, only starting point of 'throw' and will, IMO, only change engagement RPM as it can't change the max travel of the clutch or any aspect of the shift-curve.
The clicker on the pDrive only changes the "tip in" position of the weight and not the profile nor inclination of the curve in relation to the roller travel axis.
Correct me, with better info, if I'm wrong here....
As such, changing the clicker setting can only change how much of the weight is in the "centripidal stream" acting on the weight... which only changes engagement RPM. I know this is contrary to the manual... but I believe that the philosophy there too is a carryover from previous manuals.
In fact, I cannot see anywhere in the design where the clickers on the new pDrive clutch will have any similarity to the clickers on the TRA... and cannot see where they will adjust anything but 'tip-in' RPM...
As an owner of both TRA's and P85-Polaris clutches I've taken the time to understand them both...and, from the beginning of this very thread have evolved my understanding of the pDrive.
The mentality of P85/Cat tuning applies much more to this clutch than the mentality of tuning TRA's.
AS ALWAYS... I am sincerely open to any thoughtful description/info to the contrary... I love to learn about this stuff.
.
The pdrive weight does change its curve essentially as you change the clicker position. Although the axle is fixed the cam essentially gives it 5 different axle locations so the statement of it not changing the profile is incorrect. Your one diagram even shows the profile changing as the clicker changes ( essentially giving you 5 different profiles in one weight. The bolt in the center of the pdrive weight( changed for weight corrections) is the fixed pivot with the tip and the base both moving up and down ( like a seesaw) as the clicker is adjusted.
if some one puts a video on the sight it should be for all to see. What a bunch of crap!!!!!
To me... the term "Ramp" is an outdated carryover from the TRA that does not have any application to the pDrive Clutch in the 850's, IMO.... and confuses things more for the end user to understand in discussions.
Cam, flyweight, or just 'weight' IS a better description of the part.
You would actually have to change the weight to one with a different curve of the face of the weight, that contacts the roller, to do the same thing as a clicker adjustment of the TRA.
The TRA clicker actually changes the Ramp inclination.... whereas the clicker on a pDrive, the weight still pivots on the same axle location regardless of the clicker position; the pDrive weight will never change in terms of inclination, only starting point of 'throw' and will, IMO, only change engagement RPM as it can't change the max travel of the clutch or any aspect of the shift-curve.
The clicker on the pDrive only changes the "tip in" position of the weight and not the profile nor inclination of the curve in relation to the roller travel axis.
Correct me, with better info, if I'm wrong here....
As such, changing the clicker setting can only change how much of the weight is in the "centripidal stream" acting on the weight... which only changes engagement RPM. I know this is contrary to the manual... but I believe that the philosophy there too is a carryover from previous manuals.
In fact, I cannot see anywhere in the design where the clickers on the new pDrive clutch will have any similarity to the clickers on the TRA... and cannot see where they will adjust anything but 'tip-in' RPM...
As an owner of both TRA's and P85-Polaris clutches I've taken the time to understand them both...and, from the beginning of this very thread have evolved my understanding of the pDrive.
The mentality of P85/Cat tuning applies much more to this clutch than the mentality of tuning TRA's.
AS ALWAYS... I am sincerely open to any thoughtful description/info to the contrary... I love to learn about this stuff.
.
Anybody running the ZRP flyweights at the 3-6k elevation? If so how much weight and where did you put it? (Heel, mid or tip). Thanks!
In my testing, Changing of the clickers does not affect the engagement rpm. Changing weight to the flyweight may affect it like in the past. Also changing the clickers does change the rpm like the tra, defiantly not the same amount as the as the tra but they do work. What was found tho going down in clickers was the same as going up in the tra. The sled got buzzy, and didnt pull as hard.
What was noticed tho that the amount "flash"rpm was worse on the lower clickers on the pDrive. Thats why the max function on the gauge should not be used for tuning.
I think these new adjustable flyweight is going to be the ticket. Forget about the clickers, leave it on 3 and add or subtract the weight as needed.
Sent from my iPad using Tapatalk
Would go with a Yamaha clutch long before the Polaris -- you know it will last and way more tuneable. Pdrive will be just fine with a few tweaks anyway not sure anyone would be able to machine the flat spot that indexes the Pdrive into a existing clutch.