G 4 clickers

maierch

Active VIP Member
Joined
Oct 26, 2008
Messages
1,565
Reaction score
2,512
Location
Calgary
Why did the clickers work so good on the 800 etec but not the 850?

Because the TRA is a completely different clutch than the PDrive. Adjusting the clickers on the TRA only changed the ramp angle, making it steeper (if going to a higher number) and resisting the roller and flyweight from travelling up it thus causing the engine to rev more. The location of flyweight stayed essentially the same. But don't kid yourself the TRA wasn't the most efficient system- if you're running around on clicker 5 all the time a lot is being left on the table as far as clutching is concerned. Think of it as more of a band-aid for the times you find yourself riding at higher elevations than you normally do you have a way to get build RPM that is lost due to the horsepower loss at elevation.

Now the PDrive has the fly weight incorporated into the ramp. Adjusting the angle of the ramp also changes the location of the flyweight thus causing different changes like overshoot (did someone say popped reeds) at lower clicker positions and harder belt clamping at higher positions.

This is why I said to read the entire page from the race manual not just scan to where it says ABOUT 150 RPM increments as there is a lot of good information in there. There are another couple of other pages discussing the effects on RPM of various locations and amounts of flyweight. But for that you'll have to pick up the race manual yourself. The part number is 484 801 524, I think its around $80.
 

Caper11

Active VIP Member
Joined
Oct 28, 2007
Messages
9,483
Reaction score
18,413
Location
Edson,Alberta
The 850 gauge sucks for tuning, dont use the max rpm function at all for tuning your clutching.

Like I said. Dont be afraid to play with the clickers. But weight needs to be added or removed to the pivot per clicker change. The clickers have the opposite feel than the clickers on a TRA.

Just because your getting your rpm does not mean your getting the power to the ground. PFI is correct, and there is alot of info in that race manual thats vague and incomplete.
There is alot of performance to be gained in the clutching on the 850.

Im my testing some sleds seen a clicker position change of approx 30rpm per click, another sled on the same day saw 150. Can anyone guess why??? I know PFI knows.
 
Last edited:

fredw

Active VIP Member
Joined
Jan 15, 2010
Messages
3,317
Reaction score
3,586
Location
medicine hat
Actually since i helixed up and stiffened secondary spring, added 2.5 more grams, no more jumping rpm on max recall.. It works like it should now and like other previous sleds in the past.. It could be doing its job just fine, but stock clutching is just so bad



The 850 gauge sucks for tuning, dont use the max rpm function at all for tuning your clutching.

Like I said. Dont be afraid to play with the clickers. But weight needs to be added or removed to the pivot per clicker change. The clickers have the opposite feel than the clickers on a TRA.

Just because your getting your rpm does not mean your getting the power to the ground. PFI is correct, and there is alot of info in that race manual thats vague and incomplete.
There is alot of performance to be gained in the clutching on the 850.

Im my testing some sleds seen a clicker position change of approx 30rpm per click, another sled on the same day saw 150. Can anyone guess why??? I know PFI knows.
 

fynnigan

Active VIP Member
Joined
Jun 21, 2013
Messages
352
Reaction score
681
Location
somewhere in ne bc
The 850 gauge sucks for tuning, dont use the max rpm function at all for tuning your clutching.

Like I said. Dont be afraid to play with the clickers. But weight needs to be added or removed to the pivot per clicker change. The clickers have the opposite feel than the clickers on a TRA.

Just because your getting your rpm does not mean your getting the power to the ground. PFI is correct, and there is alot of info in that race manual thats vague and incomplete.
There is alot of performance to be gained in the clutching on the 850.

Im my testing some sleds seen a clicker position change of approx 30rpm per click, another sled on the same day saw 150. Can anyone guess why??? I know PFI knows.
So what does Pfi know ?
 
Top Bottom