Was into go-karts and raced several different classes with a Yamaha 100.Raced mostly temporary street courses varying in design and length fron 1/4 to 3/4 mile.Sure makes me appriciate the Fiero that much more.
i JUST bought a Cobra chassis with a (used to be)5hp Briggs. Has Methanol carb, horstman rod, weisco piston, precision cams / cam, and 3 stage header... water brake dynoed at 16hp. ! tested at Hill Motorsports Dalton, Ga. Haven't raced yet.. next event isn't till 2 fridays from now... 6x11 Bridgestones on the front and 6x12 on the rear. adjustable tension frame.. I'm trying to find info on forced induction.. I've seen a supercharger on a "Blockzilla" pulling 12psi and pver 40hp!!! out of a basicly normal 5hp Briggs block. what do those yamys pull.. lot morre RPM than i do i'm sure.. but any HP ideas... www.4cycle.com
My friend bought a go kart from the local motorcycle shop. It has 4wd disc breaks and a KX250 engine with pipe. I hopped in and was kinda scared doing 60mph with only a helmet on and no leathers. My friend said it can go over 100mph.
Cliff Pennock Administrator
Posts: 10933 From: Haarlem, The Netherlands Registered: Jan 99
I've done a couple of years of Formula 4 karting (125cc) but never actually participated in a race since I was too young at that time for this class. I was in the same team as the dutch champion and european champion, and I was a lot faster than them (I still hold the unofficial track-record for that track). A few month before I would do my first race, the team was cancelled because one of the major sponsors withdrew. Turned out one of my team-mates was spending sponsor money on all kinds of things that had nothing to do with karting.
Perhaps I still have some old photo's laying around. I'll see if I can find them and post them here.
Posts: 3905 From: Dallas, GA. Registered: Jan 2000
I raced dirt oval for a couple of seasons. It was a blast! I just hate the amount of prep time involved in keeping competitive. Since I was on a very limited budget, there was no way that I could out horsepower those guys with $1500 and more in their race engines.
Stock Yamaha runs about 17-18 horsepower and typically will turn 14500 Rpm, sometimes more or less depending on track configuration and the expansion exhaust pipe you are using.Cooter, I assume you were running a Briggs on a dirt track, which really gets expensive. The last couple of years I raced, I ran a Sportsman class with an RLV YBX muffler. It cut the HP down to about 9-10, but it cut everyone elses to that range and removed most modification gains.Very little preparation,very little maintenance, and very competitive racing.I ran asphalt, and cleaning consisted of spraying down with wd-40.Very little wear and tear on clutches and tires too.Setup at new tracks (I ran temporary road courses, mainly sprint courses but with a mix of ovals) was very simple, and if you didn't mind driving a little slower, it made racing much more competitive and enjoyable.The class has gained popularity in recent years and really seperated the engine builders drivers from the real drivers.Racing the "can" Yamaha class is most definately the most economical class, very little wear and tear and very fun.