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The mini thread

Discussion in 'Mini Racing' started by backcountryme, Jul 18, 2016.

  1. SuddenBraking

    SuddenBraking The Iron Price

    That seems to be what miniGP at NJMP does - the "L" versions (with the bigger wheels) are allowed in Stock 100 but the non-L versions aren't. And the line about the XR80 below is where I got the idea but if it's really a push between extra speed vs worse brakes than I'll just save the money and time and keep the stock wheel on there. So it sounds like I just need some BT45s on the bike and it's ready to race :clap:

    upload_2016-11-2_9-52-52.png
     
  2. rk97

    rk97 Well-Known Member

    That's interesting that their rule reads as if ANY bike in that class can use the Honda front wheel. actually using the wheel would require a ton of modification to stay legal with their OEM fork rule though.

    OMRL's stock moto rule explicitly says that Honda XR/CRF 100's can use an XR80 front wheel, or (new for 2017) lace a stock rear hoop to a front hub. it's a tad wider. Not sure there is any performance advantage. We're also allowed to use Buchanan spokes. They add weight, so the only 'performance advantage' is that they don't break as often.
     
    SuddenBraking likes this.
  3. Pigman

    Pigman Well-Known Member

    Stock 100....no engine Mods. Would a Chimera intake viod that?
     
  4. TurboBlew

    TurboBlew Registers Abusers

    a couple of guys have put the MB5 disc setup on their bikes at Herrins. None of them were fast enough to make an impact with that setup.
    I believe the fastest Formula 3 spec 100 Ive seen went 42.3 for a qualifying time this year. Herrin's personal fastest recorded lap on a stock class spec 100 is a 43.0. (usually what everyone uses as a benchmark) Both bikes have stock drum brakes. The faster bike is owned & ridden by James Stroud. :D

    The 19" front on the TTR isnt terrible. The 16" feels much better to me. The BTs do come in a usable 19" size... so thats a plus.

    I really want to put 19"s on both ends of a 100 for giggles. The swingarm needs about 1.5" more length. I got a quote for $300 to extend & brace it. Kinda lost interest at that point.
     
  5. TurboBlew

    TurboBlew Registers Abusers

    for a grom?
     
  6. rk97

    rk97 Well-Known Member

    What would the advantage of that be? Why not just go to 17" wheels with better tire options? I know you can scrap a peg with the 16's, but are there 19" tire options be good enough to exploit the extra clearance?

    seems like it would also create a gearing problem.
     
  7. sharky nrk

    sharky nrk Rubber Side Up

    While I find that really interesting (the disk setup didn't really go any faster) I feel like a disk setup would be a decent improvement in consistency and feel more like the brakes on the bigger bikes. I don't use much rear brake on the XR and the front drum doesn't really seem to let me know what is going to happen in terms of slowing down until I'm through the corner anyways lol. And after about 10 laps around the kart track I worry its going to stop me at all.
     
  8. TurboBlew

    TurboBlew Registers Abusers

    The bt45 is good enough in the 19" variety. Not in search of extra traction just maybe some ride height. (and some how I ended up with 2 19" BT tires...lol)
     
    rk97 likes this.
  9. Pigman

    Pigman Well-Known Member


    Yea....sorry for the Grom
     
  10. TurboBlew

    TurboBlew Registers Abusers

    There are a few tricks to getting the front drums to work. Stock pads, a clean/scuffed drum, and a well lubed unstretched cable. I havent found a longer "lever" that would bolt onto the stock hub. The rear is easy enough to put a longer lever on & it dramatically increases its power...even at the end of a race. Sometimes Ill accidently stab it and the back end is squealing and fishtailing.
     
  11. sharky nrk

    sharky nrk Rubber Side Up

    ^^ I try and make sure I do all of the "known" stuff to keep the drums as good as they can be: new oem shoes, new oem cable, lightly sand the hub and really clean it when installing, center the drum and hold while tighten the axle. It does make a difference but ...... still not exactly great.
     
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  12. TurboBlew

    TurboBlew Registers Abusers

    at Herrins I dont think there are any formal rules other than it has to be a Grom. But some guys have big bores, etc.
    In the Middleweight classes you can get into some good battles with other makes & models but its run what you brung.
     
  13. TurboBlew

    TurboBlew Registers Abusers

    yeah there is only so much you can do. Thats why the TTR is slightly better in that regard.
     
  14. Pigman

    Pigman Well-Known Member

    Nice.....thks
     
  15. TurboBlew

    TurboBlew Registers Abusers

    just saw Suddens class picture post. Doesnt say anything about "intakes or airbox" mods so that should be ok.
     
  16. Kurlon

    Kurlon Well-Known Member

    I'm not impressed with the TT-R's front disc. Even with an oversize floating rotor, YZ pads (sintered) and a line and master upgrade they were still pretty meh. I got most of my woah out of dropping a gear or three at the right time.
     
  17. Pigman

    Pigman Well-Known Member

    Mine.....SSR with a 150



    [​IMG]
     
  18. rk97

    rk97 Well-Known Member

    only Honda 100 brake "trick" i haven't seen suggested yet is the thumb-screw adjuster. You can use a clutch-cable adjuster from a full-sized bike on the XR brake lever. It not only makes it quicker and easier to tighten up the cable throughout the race day, but the aftermarket adjuster has a longer threaded area, so you actually get MORE adjustment out of it before you have to move the (shoe) lever up a tooth.

    I couldnt' find the exact one I have, but this is what I'm talking about:
    [​IMG]

    Just by looking at the picture, you can see how much longer the threaded area is than the stock part.
     
  19. rk97

    rk97 Well-Known Member

    Your time post made me curious. I found this when I started digging for quicker times http://speedhive.mylaps.com/Sessions/3857470

    That also happens to be a race I was in. I did NOT get near a 43. Would have been happy with a 45!
     
    TurboBlew likes this.
  20. sharky nrk

    sharky nrk Rubber Side Up


    Nice call on the adjuster, now to find one that is inexpensive and wouldn't look so garish on my beat XR lol
     
    TurboBlew likes this.

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