620 APTC swap for 800SS clutch

[rule62]

Swapped the APTC for the 800SS unit today.  Man what a difference.  More lever pull.  Really grabby.  YAY!  

Put the bike in 6th and stood on the rear brake to get the nut loose.  Worked like a charm. (Along with another friend holding the rear wheel.)

As an aside... the 800SS unit was shipped with the clutch pushrod.  I compared it to the one that came stock on my 620.  The 620 was longer.  The side that goes into the slave, with the o-rings, had some extra length.  I did not use the one that came with the 800SS unit.  I kept the stock clutch pushrod, and it works like a charm.  

Anyone need an APTC with a worn clutch pack???

[Raux]

Swapped the APTC for the 800SS unit today.  Man what a difference.  More lever pull.  Really grabby.  YAY!  

Put the bike in 6th and stood on the rear brake to get the nut loose.  Worked like a charm. (Along with another friend holding the rear wheel.)

As an aside... the 800SS unit was shipped with the clutch pushrod.  I compared it to the one that came stock on my 620.  The 620 was longer.  The side that goes into the slave, with the o-rings, had some extra length.  I did not use the one that came with the 800SS unit.  I kept the stock clutch pushrod, and it works like a charm.  

Anyone need an APTC with a worn clutch pack???

what is the main purpose of the switch? both should be able to put down the power of the bike. what did you gain/lose?

[DarkStaR]

My APTC in my s2r slips also, mostly when I go from cruising to WOT it on the freeway.  

[Raux]

My APTC in my s2r slips also, mostly when I go from cruising to WOT it on the freeway.  

i only had that problem when my oil didnt match the ambient temp and load i had on the bike.

[rule62]

what is the main purpose of the switch? both should be able to put down the power of the bike. what did you gain/lose?

I did not like the way the APTC delivered power or the lever feel (both effort and friction range).  My APTC started slipping when applying power, not only when ham-fisting a down shift.  When I went looking for a clutch pack for the APTC, the only one I could find was the OEM for over $300. I didn't want to spend the dough to replace a pack on a clutch that I didn't much like in the first place.  I found an entire 800SS clutch assembly for half that price.  Now I've got a regular old clutch.  It grabs better, doesn't slip when I don't want it to, and has better lever feel with a wider friction range that allows me to slip it manually.  And replacement clutch packs can be found readily from many manufactures for under $200 bones.  

...and I've read a few posts about APTC clutch baskets failing and really causing problems.

[Raux]

oko a mod to put in the back of my head.. great... thanks for making the money list longer

[chris1044]

How much of a difference did this swap make to the amount of power it felt like the bike was putting down?

I've got a 620 with stock clutch, and it just doesn't seem to have the pep it should - even with a 14t front sprocket.  I know that it's not a "big" engine, but it especially seems to struggle at freeway speeds when you really get on it...

[rule62]

The amount of power didn't change, just the delivery of it.  There's a more direct link between the engine and transmission now.  A more direct link between what my left hand is doing and what the bike is doing in response.  And no more wondering when and how the clutch will engage (or not) when I'm banging through the gears on a spirited straight-away.