Barnett Clutch Question

[PNBR549@Bell]

The Barnett site shows 1 friction plate set for the 1600's. However, it shows 3 different drive plate choices.

401-45-089014, 1.6 mm thick, Steel Clutch Drive Plate
401-45-078014, 2 mm thick, Steel Clutch Drive Plate
401-45-089014, 2.3 mm thick, Steel Clutch Drive Plate

Anyone know why? What's the nuance am I missing here?

Thanks !

Ride Safe !

[gssbmm]

if you look in the service manual. there are different steel plate to change the thickness of the whole clutch. I'm not going to say I completely understand the need to adjust it if you are replacing all with new but I would take a look in the manual for more info.

[PNBR549@Bell]

Originally Posted by gssbmm

if you look in the service manual. there are different steel plate to change the thickness of the whole clutch. I'm not going to say I completely understand the need to adjust it if you are replacing all with new but I would take a look in the manual for more info.

Thanks !

[ossienomad]

I have just asked the same question. Sorry didn't see your thread prior to posting. A good question though as there does not appear to be an answer in manual either. It may be possible to replace steels with the same as the manufacturer put in but to do this you need to disassemble the clutch, measure the plates then order part. Perhaps variance is determined by the thickness of the friction plates and hence the need for different sizes. Who knows? My kawasaki dealer doesn't!

[ringadingh]

I don't understand why there are three different size plates & discs either, If I had to replace them I'd go with a size close to what was in the bike originally.
Having said that, I would measure the original plates and discs to see if they are still in spec according to the manual. In my experience I have always found them to measure up almost as good as new. If they are not burnt, and the steels are not blued from heat I'd just replace the spring, that seems to be the major wear item in these clutches.

[roadhawg]

i put a Barnett spring in at about 50K miles and my disks were fine.

Love the "feel" of the stronger spring!

[macmac]

I don't know the answer, but my best guess is not all clutch baskets are the same, and the pack of friction and steel plates can only be so large / deep / thick/ long. Wet clutch plates don't wear like a single plate dry clutch does. What makes wet clutches slip are wrong oil with friction moddifiers in it and labeled energy conserving or resources saving. And Advanced moto courses where you learn how to do bike riding tech that hammers the hell out of a clutch as you ride doing maneuvers feathering the clutch the entire time. And last riding a bike with a slipping clutch for an extended time.

So long as there is material on friction plates and the steels are not all discolored and warped things are flat, no one need new plates. Nomads have weak springs in a very hot oil bath and then beside tempering temps the spring lives in it is under constant pressure. No spring can stand that forever.

[MAS Tequila]

The 'Gorilla' clutch is made up of thicker steels.

Somehow the added thickness keeps the fibers from slipping and burning.

MT