hoodedthefox
New member
Hey folks,
Picked up my first go kart, a Manco Magnum Express 606B-07, last week and am in need of some sage advice and direction.
The guy I bought it from had done a small amount of work, mostly to get it moving. It seems he rode it hard, it developed some issues, after which he put it up for sale. It's quite obvious the owner or owners before him had done some work to it. The kart has a 420cc swapped onto it, all four shocks have been replaced with Fox coil over springs, the engine has the exhaust replaced with a performance header, beyond that I do not know.
So here is where my issues begin.
First off, the Kart has almost zero functional braking power. Between the brake pedal return spring being gone and the pads being worn the brakes don't do much. I am certain the original Carlisle mechanical disc brake will need to be upgraded to a hydraulic brake in the future.

So my first question is, is that Carlisle break worth repairing or replacing for a quick immediate solution? Will that brake actually stop and hold up to the 420cc? The repair kits and OEM replacements are both under 40 bucks, toss in 25 more and I can get a slotted rotor. I imagine I will work towards a 3 brake hydraulic set in the future, but that will require modifying the front end to accept brakes and doing some back end work.
Next up, the throttle response off the line is pretty bad, and by that I mean it bogs for a bit then clears up. In my examinations I "think" it is a governor/governor spring issue. Can anyone confirm that this could be the governor spring being worn out?

The previous owner had the throttle return spring attached to the carb causing it to stay WOT, I moved it over to the throttle arm where I believe it should be, but it is not fixed in place as that bracket seems to be missing
MY final point is to it's steering. Frankly, it's bad. Not sure what sort of solutions would be best for this. I have not attempted to adjust the suspension, but considered that it could improve ride quality and steering. Currently the front has 145/70-6 and the rear has 18x9.5-8. Would a larger front tire assist in steering at all?
Things I need to/want to do, include.
New seat, seat belts (go power sports seems to have that covered)
Hydraulic brakes (best source? new or used?)
I have wiring to do to replumb in a battery and the electric start +lights
Eventually probably some engine upgrades
Any and all advice you guys have is appreciated. I am mechanically inclined but have not had as much exposure as I would like. I have friends with wiring and welding knowledge and I have been watching lots of Youtube (Cars and Cameras, Redbeards) to learn what I can.
Biggest priority right now is brakes. The terrain is too steep around here to not have brakes. Below are a few more pictures for reference.
Stock carb???

Is this a 40 series? Belt seems to lead me to believe it is.

Picked up my first go kart, a Manco Magnum Express 606B-07, last week and am in need of some sage advice and direction.
The guy I bought it from had done a small amount of work, mostly to get it moving. It seems he rode it hard, it developed some issues, after which he put it up for sale. It's quite obvious the owner or owners before him had done some work to it. The kart has a 420cc swapped onto it, all four shocks have been replaced with Fox coil over springs, the engine has the exhaust replaced with a performance header, beyond that I do not know.
So here is where my issues begin.
First off, the Kart has almost zero functional braking power. Between the brake pedal return spring being gone and the pads being worn the brakes don't do much. I am certain the original Carlisle mechanical disc brake will need to be upgraded to a hydraulic brake in the future.

So my first question is, is that Carlisle break worth repairing or replacing for a quick immediate solution? Will that brake actually stop and hold up to the 420cc? The repair kits and OEM replacements are both under 40 bucks, toss in 25 more and I can get a slotted rotor. I imagine I will work towards a 3 brake hydraulic set in the future, but that will require modifying the front end to accept brakes and doing some back end work.
Next up, the throttle response off the line is pretty bad, and by that I mean it bogs for a bit then clears up. In my examinations I "think" it is a governor/governor spring issue. Can anyone confirm that this could be the governor spring being worn out?

The previous owner had the throttle return spring attached to the carb causing it to stay WOT, I moved it over to the throttle arm where I believe it should be, but it is not fixed in place as that bracket seems to be missing
MY final point is to it's steering. Frankly, it's bad. Not sure what sort of solutions would be best for this. I have not attempted to adjust the suspension, but considered that it could improve ride quality and steering. Currently the front has 145/70-6 and the rear has 18x9.5-8. Would a larger front tire assist in steering at all?
Things I need to/want to do, include.
New seat, seat belts (go power sports seems to have that covered)
Hydraulic brakes (best source? new or used?)
I have wiring to do to replumb in a battery and the electric start +lights
Eventually probably some engine upgrades
Any and all advice you guys have is appreciated. I am mechanically inclined but have not had as much exposure as I would like. I have friends with wiring and welding knowledge and I have been watching lots of Youtube (Cars and Cameras, Redbeards) to learn what I can.
Biggest priority right now is brakes. The terrain is too steep around here to not have brakes. Below are a few more pictures for reference.
Stock carb???

Is this a 40 series? Belt seems to lead me to believe it is.
