Clutch Actuator Upgrade- Mui Bueno!

Discussion in 'Performance Mods' started by BrettMavriK, Nov 3, 2008.

  1. BrettMavriK

    BrettMavriK Member

    I just gotta put this out there. A great guy deserves praise...

    I just purchased a clutch actuator upgrade kit from Creative Engineering, and wow, what a fine built billet piece. I can operate and feather the clutch with one finger now. Jim the owner/machinist there is a great guy. He's got more trick mods in the works like a 10,000 rpm HT motor! He took an engine apart and put his guages on the pieces and found the crankshaft counter weights were 15,000ths out of round alone. (no wonder they vibrate) He said he's going to completely revamp the whole shebang and offer em' up. After seeing his shop, I believe him.

    here's the website:

    Last edited by a moderator: May 29, 2009

  2. heathyoung

    heathyoung Member

    Huh. A local seller on fleabay was selling these in Australia for $150.00 - even with our crappy exchange rate thats a heck of a markup!

    Sounds like some interesting developments will be forthcoming...
  3. fetor56

    fetor56 Guest

    It's good that he designed it properly & that's how it should have been originally,but i don't understand the statement on his website "will no longer have to pedal up to speed before releasing the clutch".
    Why won't u have to pedal up to speed;soft clutch/hard clutch,you'll still need that same given amount of speed for the engine to start. :confused:
  4. BrettMavriK

    BrettMavriK Member

    This guy in OZ promised him he could sell a bunch, and when Jim found out what he was marking them up to, he pulled the plug on him. So now Jim has it posted on craigslist for $27.95usd.

    What Jim means by that statement is the fact that the motor kit he first recieved was so abrupt in the clutch actuator transition, it was all he could do to let it out from a dead stop without killing the motor. His clutch upgrade kit is totally a new piece with the proper geometry to actually feather out the clutch like a motorcycle. Much much much more control. In my opinion, that was the best $27.95 I've spent in a long time.

    I can't wait until he revamps an HT motor to 10,000 rpm and more than twice the hp... can you say incredible hulk happy time?!?!? it'll give the friction boys something to talk about.

  5. Pablo

    Pablo Motored Bikes Sponsor

    So Jim had the same encounter with my favorite Aussie eBay guy.......buwaaahhahahahhaahaa!

    I like clutch kit. Nice.
  6. fetor56

    fetor56 Guest

    Who is this dude,he sounds a rather untrustworthy fellow?
  7. fastboy9

    fastboy9 Member

    I've heard alot about this clutch actuator, sounds pretty good. And a 10,000rpm Happy time??!! That would be amazing! I knew it was them crankshafts, they are wayy out of balance thats why it is the only engine I know to shake that badly. Ferocious resonance plus rubbish chinese fittings and your just waiting for failures. There are quite a few interesting and exciting developments to the happy time, and about time too seeing as the design has barely changed since the late 60's. A UK dealer has developed and produced a happy time that runs on bio-fuel, and is looking to mass produce in the near future

  8. Pablo

    Pablo Motored Bikes Sponsor

    fetor56 - PM me
  9. BrettMavriK

    BrettMavriK Member

    Yeah, they are crazy bad out of spec, Jim says...
    He's going machined billet on much of the internals where he can, I believe. Jim has the capability of making an entire motor from scratch if he wants to. The goal is to be balanced and of high tolerance with upgraded bearings, rings, and such. He has no doubt the HT's are capable of 10,000 rpm and 2/3 more horses at least. Then other things will have to follow suit to match the revamped motor; rejetted or different carb, tuned expansion exhaust, etc.

    I can't wait to get one for my 3 speed, jackshafted, chopper Im building.
  10. JemmaUK

    JemmaUK Guest

    They probably are capable of 10k rpm when they have been probably fettled and not slapped together any old how.. I know the Fantic engines could spin that speed although they did tend to demolish rings at a fairly impressive rate.

    Only thing that slightly worries me is that we have an engine that could give out enough power to be dangerous when mounted to a completely standard bike frame/brakes etc.

    Although I have to say the reliability is the one thing that has put me off these in the past.

    Jemma xx
  11. Please don't get me wrong because overall it's a pretty good price for what you're getting visually appealing and looks stronger too but I still like my mod sorry I had to say it! :D
    It seems to me the longer clutch arm would mean a longer reach for the reduction happens when it takes a little more cable to engage the clutch.
    But again,it's a nice design. Way better than the stock setup.
  12. BrettMavriK

    BrettMavriK Member

    The clutch arm isn't any longer at all.....just remade.
    That's not the gimmick or fix to this redesigned clutch actuator.
    It's all about the actuator bolt. Jim's redesigned geometry of this is like night and day to stock. It takes one finger to operate, and the transition to power is ultimately smooth and completely controllable. it almost feels like a hydraulic clutch on a motorcycle. This upgrade is now the first purchase for me whenever I build a bike; single gear or multiple.

    Best 27 bucks I've ever spent.

  13. graucho

    graucho Active Member

    Yes Large, i'll toot your horn for ya.:shock: (well you know what I mean) I couldn't pass up your 7.00 mod when you came up with it. Im re-posting the thread for any newbies out there. Your mod is also 1 finger ease. Smoooooth.
    I also posted a few pic's out of that thread.
    As far as the 10000rpm happytime re-design, cant wait to see it!

    Attached Files:

  14. BrettMavriK

    BrettMavriK Member

    Hey, that's pretty cool!
    Innovative. A little too "erector set" for me, but if it works, it works.
    I'm an asthetic kinda' guy. I'm into the smoothest, cleanest lines I can create on my bikes. I'm even going to the lengths of forming chain guards for both sides of the bike that are "free floating" with a bearing like a "spinner rim" on a bling bling DUB ride. I like Jim's kit because it solves the problem internally instead of externally. The billet looks cool too. If I could get a complete billet engine, I'd be in heaven.
    I'll be R&D'ing this Jim's motor upgrade on my 3 speed chopper set up and will flog it thoroughly. I know the carb will have to be reworked or replaced and a bigger expansion chamber will have to be designed in CAD. I wonder if a velocity stack or ram air will help. Definitely a boost bottle to smooth the valve overlap will be par for the course. I love these motorized bicycles!!!

    Such a great and relatively inexpensive way to have fun, tinker, and create.

  15. littlejohn411

    littlejohn411 New Member

    Just got mine in today,really fast shipping,just wish my motor would get here!

    Built better than the kit it's goin on,keep those mods commin, i'll buy them all!
  16. Pablo

    Pablo Motored Bikes Sponsor

    We got my mule bike all back together today. I would say the clutch kit works well with the Shifter Kit, but there are some necessary steps:

    1) You will need 40 mm bolts for the front two and a 50+ long bolt and a nut for the back hole. It may be ok to use a 40mm bolt for the rear hole as well but the threads in that hole are very weak and I think it's prudent to run the fastener through using a nut and washer. Especially because these hold the left plate.

    2) As far as alignment and fit, we did need an extra spacer washer along with the standard one by the 17T sprocket to properly allow for the taller new clutch cover.

    3) When we got it all together even with the clutch disengaged the chain would not spin freely. Took some head scratching.....The chain was hitting the very back of the machined new cover and we couldn't adjust it forward to clear. I used a burr tool in the Dremel to hog some aluminum out.

    4) You'll probably need to cut the protruding threaded portion of the upper (left) u-bolt. Mine hit the longer clutch arm.

    5) The instructions are thorough - a little clunky (Jim is not claiming to be Shakespeare), but dang it thoroughly gets the point across for the most part. It's best to do the install starting with the clutch over off so you can see what is going on. I needed to grind the shortest pin and I would say that if you need to use the screws (bolts) to pull the new cover in at all, then the pin is too long. Just touching....but not actuating the clutch is something to keep in mind. Then you can dial it in with the flower nut.

    6) Don't use a heavy grease or especially tacky grease on the cam round surfaces. My special clutch gear grease is way to tacky for the cam/housing contact surfaces (tightly machined). Made it quite sticky. Amazingly the freewheel grease made the the cam turn perfectly. Tacky grease is fine on the eccentric and pin.

    The feel is very smooth now. Especially with the teflon coated clutch cable. Like hot knife in butter. Pinky easy.
  17. BrettMavriK

    BrettMavriK Member

    17t? The one on my Zone8 engines is a 10t on the counter shaft.......????
    It all bolted up with zero issues. That may a precautionary point about the one bolt going all the way through and a nut on the backside. I'll run mine as is, and keep a longer bolt with a nut and washer handy if it ever pulls through on the case threads.
    -Anyone ever had this happen?


  18. Pablo

    Pablo Motored Bikes Sponsor

    I'm talking about installing the clutch kit with the shifter kit. See step 6-12:

    And yes with the thickness of the left plate, AND the taller clutch actuator housing the longer bolts are necessary. The nut is extra security.

    I'll post some pictures of the set-up this evening, including the area I needed to machine.

    All in all - I like the clutch kit. Especially with a teflon coated's baby pinky easy actuation. The reason for my post is for folks with a shifter kit and the few extra (easy) steps.
  19. BrettMavriK

    BrettMavriK Member

    Did your clutch actuator kit come with socket head bolts as mine did?
    Just making sure.


  20. Pablo

    Pablo Motored Bikes Sponsor

    It did but they are too short.