Weight without driver
- Thread starter Hooper07
- Start date
Ted Hamilton
Helmet Painter / Racer
Twice what they should, and 50% more than required to develop a hernia.
Probably 200# would be a good guess...
Probably 200# would be a good guess...
spincycle
Member
That allows for the bigger guys to be able to join in the fun...my kart race ready weighs about 170 with no lead, so a guy as much as 260 can play and be competitive...
Brian Montgomery
Member
The 300# number comes from little guys adding weight to hook them up from what I've been told.
In years past, there has been discussions about making a maximum weight for kart, or kart and driver, to help prevent injuries and damages from racing vehicles with dramatic weight differences.
Several discussions, not only in uas, but even in clone classes.
450, especially modified, likely not able to use all the power at capped minimum.
YMMV
Last edited:
Ted Hamilton
Helmet Painter / Racer
The Buell mill is HEAVY. But I'm glad to see it being used vs. the common MXers...
spincycle
Member
I think he was contemplating adding some lead to the front of the kart to bring up the nose weight..not sure if he ever did...could have been 525-530 total if he did...
racinnut15xm
Member
i will preface this by saying i've never been to or read the rulas for UAS. But man all that weight seems counterproductive... How much power difference between something thats 100cc less? how much weight can you cut off with a 350-400cc motor? Maybe the tracks are big enough back east that its not as big of a deal but all the slick bull rings around here you would be out to lunch giving up all that weight
twostroketoowoke
Member
On the flip side of the coin you are sacrificing handling by having a boat anchor (if it’s a 4 stroke and not a 500 smoker but even the CR500 is pretty heavy) on the RR providing we’re not talking about a cage kart.
twostroketoowoke
Member
It depends. If we’re talking built 450’s and JAWA’s, a reasonable number for those is 65-70HP. Minimum weight for those is around 410-450 depending on how big they’ve been built. Go to the 250F program and your minimum weight rule is anywhere between 330-350 again depending on how much you’ve bored and stroked it and you’re making a healthy 45-50 HP. So the weight drop and advantage is significant if you can have a light driver. The same goes for two strokes but since the trannyless 250 smoker is still significantly lighter than a jackshafted 450, the HP to weight ratio is much higher than the big 4 stroke bike engines because they’re making about the same HP and the 250 two stroke weighs way less. Then you have the smaller two strokes like the BRC, sudams, reedjets that are 150cc or less making the same 35-55 HP that the 250F’s are and they’re half the weight also. You are right in your thinking though. On a small track where the big heavy karts are struggling to handle, a smaller engine that can enjoy the weight break with good tires and a light driver will kill everyone with corner speed alone. Seay and their BRC program is proof of it and they’re smoking everyone even on big tracks because of that light weight and an excellent chassis/tire program.
spincycle
Member
Raced last weekend indoors on a tight small oval, guy that won smoked us with a 2stroke reedjet, I think his TOTAL weight was like 310...Im at 400 with a stroker animal....