Kawasaki Concours Forum

The C-14, aka Kawasaki Concours-14, the new one :) => Accessories and modifications - C14/GTR 1400 => Topic started by: ThrottleJock on August 09, 2017, 10:56:01 AM

Title: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 09, 2017, 10:56:01 AM
I'm in the process of installing a 30-shot of nitrous on my '08, I'm wondering whether it'll cook the clutch or not. Bike currently has zx14 throttle bodies and injectors, zx14 muzzy's full exhaust and a PCV. I'm having the bike dyno tuned, ECU flashed (derestriction mostly) and two maps built in a couple weeks. Not 100% sure the clutch will survive abuse on the dyno with the gas. Any guesses?
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: VirginiaJim on August 09, 2017, 12:21:06 PM
 :popcorn:   No guesses, but it should be interesting.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: B.D.F. on August 09, 2017, 12:47:51 PM
As I remember, the guys who are hanging turbos off of C-14s went over to at least some ZX 14 parts if not the entire clutch.

But to answer your question directly: I cannot answer your question.

Brian

:popcorn:   No guesses, but it should be interesting.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: VirginiaJim on August 09, 2017, 01:40:28 PM
My not guess is that the bike isn't designed for such things and while it may work, some pieces of the bike may not be robust enough to hold up...like the clutch, engine, drive train.   But again I still think it's an interesting thing to do.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 09, 2017, 02:46:53 PM
I'm pretty confident that the engine will suck down 30 horse of nitrous all day if the fueling is right and some safety measures are in place. The general safe rule is 10hp/cylinder. The valve springs would be a limiting factor but they're the same as on a zx14, those bikes are happy ingesting 40-50 shots for hundreds of passes. I'm installing an rpm window switch that reads tpms voltage and will not fire the n02 solenoid outside of the window so if (when) I miss a shift, bang the rev limiter, etc... dire consequences will be avoided. Also wiring a relay in which will flip to the nitrous fuel map when the activation (horn button) is depressed. Anyway, seemed like a great idea at the time. I'll let you know how it goes. Ha!
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: maxtog on August 09, 2017, 02:58:54 PM
I'll let you know how it goes. Ha!

 :popcorn:

:)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: B.D.F. on August 09, 2017, 03:12:46 PM
Jim, did you say with utter certainty that it may or may not work? If so, and that is how I read it, I absolutely agree.

 :popcorn:

Brian

My not guess is that the bike isn't designed for such things and while it may work, some pieces of the bike may not be robust enough to hold up...like the clutch, engine, drive train.   But again I still think it's an interesting thing to do.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 09, 2017, 03:21:13 PM
I love it. The good news is that complete motors are about $800 on eBay.  ;D
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: Rhino on August 09, 2017, 03:40:24 PM
I don't know the answer to the question but it should be fun finding out!
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: B.D.F. on August 09, 2017, 03:59:17 PM
There are two gentlemen out there who have hung turbos off of C-14's: one is Spasonaconcours (I think his real name is Dustin) and I cannot remember the other one's name or handle. Dustin ended up munching an engine due to the fuel pressurization diaphragm giving out but I do not remember either one of them having any trouble with the clutches, or making any huge mods.

You could do a search of this forum as well as Google of course.

Brian

I love it. The good news is that complete motors are about $800 on eBay.  ;D
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: VirginiaJim on August 09, 2017, 04:10:01 PM
Jim, did you say with utter certainty that it may or may not work? If so, and that is how I read it, I absolutely agree.

 :popcorn:

Brian

I say ni with udder certainty that I am positively pessimistic about some things and not others.   I hope that clears it up.  ;)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 09, 2017, 05:08:13 PM
There are two gentlemen out there who have hung turbos off of C-14's: one is Spasonaconcours (I think his real name is Dustin) and I cannot remember the other one's name or handle. Dustin ended up munching an engine due to the fuel pressurization diaphragm giving out but I do not remember either one of them having any trouble with the clutches, or making any huge mods.

You could do a search of this forum as well as Google of course.

Brian
The other went by the handle punkynlew1
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: B.D.F. on August 09, 2017, 05:40:34 PM
Maybe but that does not sound right Gary. ?? I think Punky and Lew (however he put it together) came along much later than the first turbo- guy I remember tweaking a C-14, and I only remember two with Dustin being the second and so far, last.

Brian

The other went by the handle punkynlew1
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: deepseamdv on August 10, 2017, 05:48:11 PM
Without guys like the OP we might still be riding 36 bhp English Twins. Or is that Twin Engine Hog Slayers? I say go for it then lets us know how it goes.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 04:11:57 AM
Just to be safe, I ordered up a fresh set of oem fibers and brocks spring shims. I'm betting that khi engineered a little headroom into the design and it'll handle it like a champ. Results will be in on August 22nd (assuming I can find some damn nitrous... industry-wide shortage right now as a result of the Airgas plant explosion in Jan).
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 11, 2017, 04:19:15 AM
 :thumbs: :popcorn:
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 04:33:46 AM
It's like these things were designed for the giggle gas. Tons of space for bottles and solenoid.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 11, 2017, 04:37:27 AM
Building as a street sleeper? or will you be able to make a pass or two at the track with the bags on?
I'd recommend pinning the bags for peace of mind.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 05:10:17 AM
Both, really. I think sleepers are hilarious in all forms, but the the initial intent was to set it up to look stock, show up at the track with aerostich and bags on and crack people up by laying down 130mph passes.

Bags are pinned.  ;D
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 11, 2017, 05:24:22 AM
luck to you and we'll need more pics  :)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 06:22:46 AM
More show n tell: ZX14 tb's with secondaries out, muzzy's full 2-into-1, and 10R front wheel mostly cause I like the way they look
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 06:23:24 AM
 8)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 11, 2017, 06:37:43 AM
C14 or zx injectors?

That wheel would look good with a shorty fender.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 11, 2017, 06:59:42 AM
ZX injectors, I took a gamble there since it's firing down smaller ports and with a milder cam, but we'll see.

I like the look of the 10R fender conversions but I'm having trouble justifying $50 for the brackets. Might make my own.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: Rhino on August 11, 2017, 10:42:00 AM
Would love to see you run. Fastest bagger on the track I would bet.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: datsaxman@hotmail.com on August 12, 2017, 08:49:01 PM
Dayum. 

I like the ZX14 TBs and full exhaust just fine.  Might need some boost too...


saxman
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 22, 2017, 03:37:30 PM
Whelp, there's STILL a nationwide shortage of giggle gas... I found one guy who would sell me 2.5lbs of his personal stash so I could do the tune... for $20/pound! **** that! For those of you who don't know, nitrous should be about $4/pound. An Airgas plant in FL blew up in January and they're still playing catch up. So nitrous is on the back burner. I've decided to turn my attention to the suspension and brakes. Step one: Ohlins shock on the way
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 22, 2017, 03:41:24 PM
Small thing, but I added a few "old man" stickers to further solidify the sleeper status. Going to need a new plate though, that one's a carryover from my KTM 950SM (sloooow in comparison).
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on August 22, 2017, 03:43:47 PM
So lonely. So empty. :(
15 pound fill bottle waiting patiently for nitrous commodity to return to a reasonable market value.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: maxtog on August 22, 2017, 03:45:04 PM
Small thing, but I added a few "old man" stickers to further solidify the sleeper status. Going to need a new plate though, that one's a carryover from my KTM 950SM (sloooow in comparison).

LOL
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on August 22, 2017, 04:48:26 PM
So lonely. So empty. :(
15 pound fill bottle waiting patiently for nitrous commodity to return to a reasonable market value.
What about the dentist?
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: maxtog on August 22, 2017, 05:33:44 PM
What about the dentist?

I was thinking the same thing.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: The Pope on August 23, 2017, 04:17:19 AM
Only because I have noticed it being mentioned in this thread.........

...... you are aware that the C14 has Cast Pistons and the ZX14 has Forged Pistons, right?
(you most likely already know, but I just wanted to make sure)

Either way, I do hope that things go better than expected.............  :popcorn:
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: deepseamdv on September 04, 2017, 09:54:18 AM
Any further word on your N02 system? How do you like the new shock? What are you planning for the forks?
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: ThrottleJock on September 06, 2017, 01:10:55 PM
Still not readily available around here so it may turn into a springtime thing. Money's spent, I've got all the components, just need to give 'er the gas and have it dyno tuned.

The shock is awesome. I did 218mi up in the mountains this weekend and after a little dial spinning it handles much better. Proper spring rate makes all the difference too. The bike no longer bucks or wallows, it just takes a set and tracks like a champ. The front end is the limiting factor now. Too soft, too much weight transfer and monkey motion. I actually began to tuck the front twice but scrubbed enough speed to ride out of it. Thats the beauty of street tires... they may not be as sticky but they're generally very forgiving with a lot of notice before they let go. I also found where this bike drags second on the right side... the exhaust midpipe. Pegs touch down first (feelers removed), then the midpipe drags. I started hanging off more when I noticed that. Hate to drag a hole in my Muzzy.

So the plan for the fork is a set of springs and a drop-in cartridge, 20mm or bigger if we can get one to fit. I need to do a little research.

Still loving the bike. It's outrageous to me how rapid it is for being as enormous as it is.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: jimmymac on September 06, 2017, 01:21:06 PM
I was thinking the same thing.
Surely you jest. If I could get gas from the dentist...  Cute, Guys.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: 1 wheel peel on September 22, 2017, 01:17:10 PM
ZX injectors, I took a gamble there since it's firing down smaller ports and with a milder cam, but we'll see.....

They'll do fine.  I ran 44mm Gen1 ZX TB & injectors on mine.  Didn't help much down low but it sure did scream in the upper RPM's.  Sold it to my brother he's still running them.  No giggle juice though.
(http://i304.photobucket.com/albums/nn181/1wheelpeel/Concours%2014/IMG_9071_zpsbfd5d10f.jpg) (http://s304.photobucket.com/user/1wheelpeel/media/Concours%2014/IMG_9071_zpsbfd5d10f.jpg.html)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: SpazOnaConcours on February 05, 2018, 06:46:23 PM
Speak his name, and he shall appear! Eventually.

Stock clutch will work just fine, but I highly recommend stronger hat springs. At about 6psi I would drive through the clutch between shifts... better springs alone would let it handle 9psi, 2-up, with a weeks worth of baggage. :) For reference, 6psi is about 40% more power than stock, 9psi is more than 60%. I have found that the judder/back-torque-limiting springs don't like abuse though... they will break eventually. Clutch still works just fine when it happens, but it does make downshifting a finer art. :)

...pistons are in fact cast, but they are plenty strong, so long as you don't detonate the thing. Keep the shot under 35whp, and you should be ok. Anything more and you'd want to start altering your timing a little bit to help out. I ran a .032 jet on my zx10R, completely stock, and it made about +38whp, and we tuned it from a flat 13.0:1 to 12.5:1 on the spray. worked well.

....the only bad news is that a 30 shot isn't going to be all that impressive on the Connie. She's heavy, and you're not having the same dramatic affect on the power to weight ratio like you are the supersports. That said, have at!! It's fun to see connies haul ass. :)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on February 05, 2018, 07:07:52 PM
Spaz, good to hear from you. What's your wheels these days?
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: SpazOnaConcours on February 05, 2018, 09:25:00 PM
Spaz, good to hear from you. What's your wheels these days?

Still rockin' the C14 pretty much every day... bike just refuses to quit. :) I did put the turbo 10R together as a land speed bike... went out to Speed Week/BUB's @ Bonneville last year and knocked down a soft AMA record. Took it out to El mirage and did the same, but they wouldn't make it official there because of my first time/rookie status (this year though in May, so long as nothing hideous happens, I'll go make it official). I will be working on a custom framed/turbo ZX powered 1000cc bike this year just for the Salt/El Mirage... that should be a riot! Long, low, heavy, and maybe 400ish horsepower?? I'm kind of excited on this one. :)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on February 06, 2018, 04:03:48 AM
Would like to see pics of the new sled if it happens. Luck to you and keep us informed.
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: SpazOnaConcours on February 08, 2018, 09:38:15 AM
No problem... as soon as I get around to actually building the thing!! I'm so damn busy/backed up with projects right now... it's just crazy. I'm trying to build and/or maintain 3 other land speed bikes right now, set up my anodizing line, keep the kids from burning the house down, keep the missus happy, have a normal job to pay the bills, try to actually RIDE my bikes and enjoy them.... it just never ends. :)
Title: Re: How much power can the stock ('08 C14) clutch handle?
Post by: gPink on February 08, 2018, 09:54:48 AM
 :rotflmao: luck to you