barnett clutch frictions

[onefour]

Hi there all,

I just installed barnett springs spaced out with a 1.5mm washer today. Still slipping the old frictions.

Whats the consensus with holding around 200hp @800lbs? Stock frictions and beefed up springs or the barnett frictions???

Thanks...

[lee_dutcher]

Try roughing up your steel plates first with 600 grit to remove the glazing. If that dont help ur due for new clutch.

[onefour]

Yeah, pretty much did that last time, Steels looked decent, frictions looked glazed and slippery

[natemoen]

Did you clean the frictions? Are the frictions in spec?

A lot of people have said they have had droblems with Barnett friction plates sticking and hanging up so if you end up replacing them with a different brand friction.

[TADracer]

...Whats the consensus with holding around 200hp @800lbs? Stock frictions and beefed up springs or the barnett frictions???

Another question is the application.....what are you working on that is 200 hp and 800 lbs?

Guess I should elaborate...how about some pictures and other info of your project. Might get you some better answers from those with experience with turbocharging.

[WMarshy]

You might want to consider doing the ALTO clutch mod. Because of the thickness of the ALTO friction plates you can add one more stock steel and friction plate and keep the stack height almost the same as stock (just a little taller). This will increases the surface are of the clutch and in theory it will handle more power... Do a search for it... it might be your best bet without going full custom clutch.

[onefour]

Did you clean the frictions? Are the frictions in spec?

A lot of people have said they have had droblems with Barnett friction plates sticking and hanging up so if you end up replacing them with a different brand friction.

Thanks for the info. I havent cleaned the frictions. How would one do this? Im new to bikes and wet clutches...

Another question is the application.....what are you working on that is 200 hp and 800 lbs?

Guess I should elaborate...how about some pictures and other info of your project. Might get you some better answers from those with experience with turbocharging.

Unfortunately I only have a couple pics and vids at this point, as I just threw this together the week before new years... Im running 7ish psi as of now with a ford probe turbo, some of that info should be in my sig. Im 260 lbs depending on the last time i ate... lol

You might want to consider doing the ALTO clutch mod. Because of the thickness of the ALTO friction plates you can add one more stock steel and friction plate and keep the stack height almost the same as stock (just a little taller). This will increases the surface are of the clutch and in theory it will handle more power... Do a search for it... it might be your best bet without going full custom clutch.

Thanks! Ill look into that.

[natemoen]

Kerosene and a brass brush work well for cleaning the frictions.

[onefour]

Kerosene and a brass brush work well for cleaning the frictions.

Cheers, I'll give that a whirl before I spring for new frictions!

[petejw]

what oil are you running?
any type of "energy conserving" oil will cause
it to slip, u want to run cheap sg rated oil.

[onefour]

Diesel rated 15-40. Fine for a wet clutch. Changed the oil to bike specific oil a couple times before I didnt know about oil ratings and it was the same story... Just more money for the same thing....

But anyways, lets not turn this thread into an oil discussion thread

[Geezer]

In all my years turning wrenches, I found that less than half the bikes that came in for a new clutch really needed one but since it was on the work order, that's what the bike got.

For my bikes, I would bead blast the steels, then lay them on a sheet of glass to check for flatness. Any warped ones were replaced and new ones were bead blasted too. Then I would wash the friction plates in the solvent tank and lightly scuff them up with a 120 grit or finer sanding block. After that all the parts were blown off with air, washed in soap and water and set out to dry. After that assembled as usual with a new set of springs. It was like having an all new clutch.

Warped steels are a bigger problem than warn friction disks more often than not...

Geezer

[onefour]

In all my years turning wrenches, I found that less than half the bikes that came in for a new clutch really needed one but since it was on the work order, that's what the bike got.

For my bikes, I would bead blast the steels, then lay them on a sheet of glass to check for flatness. Any warped ones were replaced and new ones were bead blasted too. Then I would wash the friction plates in the solvent tank and lightly scuff them up with a 120 grit or finer sanding block. After that all the parts were blown off with air, washed in soap and water and set out to dry. After that assembled as usual with a new set of springs. It was like having an all new clutch.

Warped steels are a bigger problem than warn friction disks more often than not...

Geezer

Thank you kindly for the spoon feeding!!!

[XS1100_OEM4ME]

Jat

Hi there all,

I just installed barnett springs spaced out with a 1.5mm washer today. Still slipping the old frictions.

Whats the consensus with holding around 200hp @800lbs? Stock frictions and beefed up springs or the barnett frictions???

Thanks...

Just a thought, but if you are running 200HP, that is 210% of what the OEM clutch was designed for, plus, I bet you ride this puppy alot harder then the manufacture was planning on I know when these bikes came out one was modified to turn in the sixes in the Qtr mile, but I am guessing the mods where many including the clutch What kind of times are you turining at the track? Sounds cool

[onefour]

Just a thought, but if you are running 200HP, that is 210% of what the OEM clutch was designed for, plus, I bet you ride this puppy alot harder then the manufacture was planning on I know when these bikes came out one was modified to turn in the sixes in the Qtr mile, but I am guessing the mods where many including the clutch What kind of times are you turining at the track? Sounds cool

Just threw it together in december, and the roads have been wet so its been a little drawn out... That and working out other things... I do plan on racing it this year, and I dont think its making 200 hp with 7 psi. Probably closer to 100-120. But the turbo can make about 200 hp, and I would like to try to up the boost if I can get the chassis to handle the power a bit better. And the more I bust into this clutch the wrinklier the nut lock gets and im probably too cheap to buy one sooo... lol Just did the barnett springs spaced with spark plug washers, it holds more, but not enough... Holds enough to spin the rear on damp roads at 120kph with my fat ass on it... So more than enough for most n/a situations I would say...

Thanks for the interest, btw...