Building my first 4 stroke

Discussion in '4-Stroke Engines' started by GasX, Oct 16, 2011.

  1. GasX

    GasX New Member

    So, I am starting my first build and I have every intention of going with a 2-stroke. However, I am a bit of an auction sniper freak and I just won an auction for a 4 stroke kit for $250 shipped. I haven't seen exactly what I am getting yet (if you get my drift), but if the product is as advertised, I think I got a great deal.

    Now I have to start a whole new round of research... (lucky me!)


  2. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    $250 that cool, what kit did you get?
    Do you have a link?

    The 4 strokes are my choice too.
  3. GasX

    GasX New Member

    Don't know the eBay linking policy, so I,ll just say 250907343527 and smile... :whistling:
  4. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    Looks like the "Hoot" drive system........Good luck.

    Have fun,
  5. GasX

    GasX New Member

    Good luck as in you're ****ed or good luck as in fare thee well, new builder?
  6. cdevidal

    cdevidal New Member

    Good luck as in you're probably screwed.

    I just found out about the Hoot by getting a motor with only 2 hours' use and having the clutch bell pop out of place. Locked up hard. That's Dax has a great replacement but it's like $90 after all the parts you need (new chain, new sprocket, etc.).
  7. Quenton Guenther

    Quenton Guenther Motored Bikes Sponsor

    I wll save you a little research time.......
    The "Hoot" isn't known for long term service.

    There are several "Hoot" versions......
    Original gear drive [called figure 8] and it is a toss up rather the clutch or gears give up first.

    The single chain primary version was also known for cutch issues and chains breaking or jumping the sprockets.

    The double chain versaion is also famous for clutch issues and both chains causing problems [hitting the inside of the case, etc.].

    Some have made an internal chain tensioner for the double chain version, but haven't heard of many success stories yet.

    Bad news is the design of the system doesn't allow for the better drives to be attached to solve the problem. The motor has a very short tappered crankshaft and limits the ability to upgrade to a good clutch.

    I guess the most important question is ........will a "weed-eater" style clutch survive usuage on a motorbike for long periods of time?

    "Weed-eater" style clutches normally connect quickly [like an on-off switch] and don't allow the motor to glide into clutch lock [like an automatic transmission automobile], and requires the motor to be geared into the "Twilight Zone" [25 X 1] in order to make it work correctly [10,000 RPMs @ 30 MPH].

    I am sure there are "weed-eater" style clutches that are slightly better, but a better clutch will most likely "stress" the balance of the "Hoot" drive components.

    Best to put it together, ride as much as possible [don't stray too far from home], and keep comming back to this site for help in patching it together to extend the life cycle.

    If the motor had a normal output shaft [5/8"] there are several companies that could help, however with the tapered shaft and in-board clutch, you will be limited on upgrade options.

    Have fun,
  8. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    The tapered shaft and in-board clutch can be upgraded to a Grubee 4G gearbox, but I don't think anyone has them for sale currently.

    The Grubee 4G gearbox is good quality design for its price with its toothed belt.

    It would have been a better deal to buy the Grubee 4G kit from the get go from