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  1. boostdoctor

    My Supercharged gx390 Byrd Wren!!!

    3 weeks of hard labor to get this supercharger setup done. But it was worth it. Ungodly power! https://www.youtube.com/watch?v=s41umwMN35E
  2. boostdoctor

    my very fast gx390 minibike!!!!!!!

    First time to the dragstrip with my modified Byrd Wren.:smile: https://www.youtube.com/watch?v=uvojZw5JRU4
  3. boostdoctor

    My Hemi Predator minibike vs Honda crf450r dirtbike

    Video of my Hemi Predator minibike vs Honda crf450r dirtbike It's been a while since I posted anything of my Hemi bike. https://www.youtube.com/watch?v=3FscfWj4788&feature=youtu.be
  4. boostdoctor

    Scwhinn chopper/ gx160 build

    So I begged this dude for this adult sized Stingray for months. He finally sold it to me last year. So, last week I finally decided to start my build. Here's my progress over a week period. The bikes rides good, but I have a clutch chatter problem that's...
  5. boostdoctor

    What's the difference between 9hp & 11hp gx340?

    I just picked up a 340 and it says 9hp. I assume this is a older model motor. What extra does the 11 hp motor have?
  6. boostdoctor

    Predator/Clone wrist pin difference?

    What's the difference between a Predator and a Clone wrist pin? Which one is stronger?
  7. boostdoctor

    Anybody using a Comet 340 torque converter?

    My 30 series converter is starting to slip the belt quite a bit. The more power I make, the worse it is. I have shift points set pretty well, but I noticed it is worse when I raise the stall, So I'm going to lower it to around 2300rpm. I know the 340 clutch is a upgrade and was wondering are...
  8. boostdoctor

    My mini vs Honda CR125

    Wanted to see if we could run with a dirt bike. It did pretty good. https://www.youtube.com/watch?v=ZpqylON6RaU&feature=youtu.be
  9. boostdoctor

    Boostdoctor's open class "Smoking Doodle"!!

    This is the beginning of one crazy project. I will be using a cr500 motor with the trans removed. A snowmo cvt is going on and the frame will be stretched 18" (I think). For now I'm thinking a double frame rail on the bottom and 1 extra rail up top....and a lot of bracing. My main focus will be...
  10. boostdoctor

    60+ hp 3/4" shaft clutch?

    I'm sure my next project will make in excess of 60hp. I have everything figured but the clutch. Is there a clutch that will handle 60+ hp with a 3/4" shaft. I really want to keep it simple and not run a cvt.
  11. boostdoctor

    Video of my son making a pass on my mini

    Made a few changes to the bike. It's working pretty good. My son is jockin'. He's 20years old and 120lbs. lol https://www.youtube.com/watch?v=nhnwApL0Zow&feature=youtu.be
  12. boostdoctor

    My first mini bike project!

    Ok guys. I'm new to the mini bike scene. But I can say they have peaked my interest. This is my first bike and I have had it for only a month. I bought the bike with a Hemi Predator and cvt already installed from my buddy. My first mod was a steering stabilizer. The stabilizer made the bike feel...
  13. boostdoctor

    maximum valve size on stock bore?

    I'm ready for some more power on my 212 Predator. I was curious of the maximum valve size that could be run with the stock 2.756 bore? In other words how big of a valve can I physically fit using the stock bore? thanks in advance.
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