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FBIracing

Member
Got a 06 ultramax race on dirt at senoia karting complex. I run sumo class.
46 front
58 left
61 cross
Yellow vega and maxxis pink blue 6lbs 5 lbs prob I have is goes into the corner good then about center off goes into a 4 wheel drift the bogs down. It happens on dry track or wet track. Any ideas
 

alvin l nunley

Premium User
Good entry then four-wheel drift; sounds like the balance is okay. I don't understand the bogging. I don't have any dirt oval experience but bogging to me means the clutch is locking up when it should be slipping. Or, the engines giving up. Maybe from lack of fuel, that causes the engine to bog. Something rubbing that shouldn't. Tire against the frame? Should be able to see that! Could be the axle loose in the bearings allowing things to get out of line such as the brake disc and disc pads. Maybe bad fuel pickup. What's the RPM through the turn.
 

FBIracing

Member
Just put new bearings in the axle it all seams good. My tach messed up over the weekend but normally max is around 6800. The bogging to me seams like it is to much traction but it is sliding if that make sense
Good entry then four-wheel drift; sounds like the balance is okay. I don't understand the bogging. I don't have any dirt oval experience but bogging to me means the clutch is locking up when it should be slipping. Or, the engines giving up. Maybe from lack of fuel, that causes the engine to bog. Something rubbing that shouldn't. Tire against the frame? Should be able to see that! Could be the axle loose in the bearings allowing things to get out of line such as the brake disc and disc pads. Maybe bad fuel pickup. What's the RPM throug
 

alvin l nunley

Premium User
Just put new bearings in the axle it all seams good. My tach messed up over the weekend but normally max is around 6800. The bogging to me seams like it is to much traction but it is sliding if that make sense
There's going to be some bogging/slowing just because you're in a turn, I'm assuming you're talking about more than normal. What's the RPM drop, is it excessive, more than normal?
 

FBIracing

Member
There's going to be some bogging/slowing just because you're in a turn, I'm assuming you're talking about more than normal. What's the RPM drop, is it excessive, more than normal?
Yes more than normal. Like I said my tach fried over the weekend so don't have the numbers. But Friday night I had it doing better during a practice night. I think it is something in tires or set up because I was making some runs with dirty tires and it helped so I am a little confused
 

Ryanm02

New member
Got a 06 ultramax race on dirt at senoia karting complex. I run sumo class.
46 front
58 left
61 cross
Yellow vega and maxxis pink blue 6lbs 5 lbs prob I have is goes into the corner good then about center off goes into a 4 wheel drift the bogs down. It happens on dry track or wet track. Any ideas
46.4 front
60 left
66-66.7 cross
Pinks and blues 6&5

I was having the same issues and finally got the chassis best with these numbers and now it’s all about tire
 

alvin l nunley

Premium User
Yes more than normal. Like I said my tach fried over the weekend so don't have the numbers. But Friday night I had it doing better during a practice night. I think it is something in tires or set up because I was making some runs with dirty tires and it helped so I am a little confused
What about steering input? Is it pushing it all. Four-wheel drift to me means near zero steering input, or maybe a little counter Steer.
 
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