Clayton
New member
I am new to the forum, is it not allowed to talk about modifying or removing the govenor on an engine without using the "right" parts? On oldminibikesforum they get on your case if you do, so I just want to know. 
Governor Removal Policy
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Bluethunder3320
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nope. no one will give a crap. a billet rod and flywheel are recommended, but you dont absolutely HAVE to get them.
of course going full throttle for a very long time will make it blow up though.
of course going full throttle for a very long time will make it blow up though.
Don't take the govenor off. Just take a rod or string and tie it around the lever that controls the carbuator. So when you pull the strong of push the rod it will fully open the valve. That is what I did, so It would be like govenor off only when I wanted it to be.
That is not nearly as reliable and is the "sdraw ssa kcab" way of doing it. If I'm putting myself in there to go ride and run the risk of injuring myself, I want to do what I can to make it as safe as possible and o thugs right. Just cause you're ok with throttling your kart with a string doesn't mean we should go around telling everyone it's the best way to do it.
robbie
New member
Most cars are set up so you can decide when and how much to open the throttle, and you can over-rev them severely if you're not smart enough to handle that kind of responsibility. Build your kart or bike the same way, and they'll be a lot more fun. Just don't destroy your engine. Don't worry, I think you're smart enough to handle it.
Russ2251
AZUSA:Powered by LAWN-BOY
They know better than to do that me!!! I'd just tear them a new one...and they know it!
Doc Sprocket
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Umm- No.
Anyways, around here we try to advise folks to do things reasonably safely, but we're not that stiff over here. Instead, we'll just laugh when you crash!!!
I'm kidding. Have a good time, and try to use yer head. Cheers!
fowler
New member
we do want u to do it properly as in some people only remove some parts of the govener which is not recomended
devino246
Official DIYGK Chem Nerd
Only older cars. Newer, more stupid person friendly vehicles have rev limiters.
Clayton
New member
Okay, I was sent a message on the oldminibikes forum that if I didn't use the "right" parts they would ban me from the forum. Right now I have a hard wire linkage setup to the carb, so it's like the gov isn't even there, but I know not to pin it for a long period of time.
Doc Sprocket
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Wow. OMB, OMG!
I suggest removing it completely if you're going to defeat it. The governor's internal parts can cause catastrophic engine failure if either the parts fail, or the governor arm were to loosely swing over and get struck by the crankshaft.
I suggest removing it completely if you're going to defeat it. The governor's internal parts can cause catastrophic engine failure if either the parts fail, or the governor arm were to loosely swing over and get struck by the crankshaft.
anderkart
Moderator
I totally agree, but I was sitting here thinking about this and it suddenly hit me that I cant remember ever running across irrefutable evidence or pics to prove this isnt just a myth. I know its widely accepted as a fact, but I was just wondering if you'd ever ran across any proof?
In a way Its kinda like the whole clone flywheel myth thing, dont ya think...
edit:
I wasn't just referring to Clayton's situation here, just the need to remove the gear as a general rule part.
Doc Sprocket
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No evidence on my part other than firsthand knowledge of the internals. I know the myth is that the flyweights can fall apart or the gear frag- I honestly don't know if they would at high RPM. However, with those weights expanding far beyond what they should, I can easily picture the button popping off. This would be a problem. The other thing that comes to mind is the actuator arm. It will get hit by the crankshaft if it were to swing too far over. This part could probably be avoided by simply putting a spring on the external arm to keep the actuator in contact with the button at all times.
But really, why risk it? If the function of the governor is not desired, why not just remove the related componentry? It's not hard...
For the record, when I say "catastrophic engine failure", I mean severe internal damage. I am in no way suggesting that the block is going to explode in a shower of semi-molten chunks...
But really, why risk it? If the function of the governor is not desired, why not just remove the related componentry? It's not hard...
For the record, when I say "catastrophic engine failure", I mean severe internal damage. I am in no way suggesting that the block is going to explode in a shower of semi-molten chunks...
Bluethunder3320
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we need to convince some rich guy to buy a clone (even on sale) and pull the governor wide open, video tape it, and put it on youtube lol.
r97
Measure twice cut once
maybe i could get some engines real cheep, then blow them up for my next ummmmmmm "science project"
Bluethunder3320
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i bet the connecting rod would be the first to blow though, or the plastic governor gear shattering and then the connecting rod getting smashed through the block lol
anderkart
Moderator
Yeah I agree with ya, my point was just that I've found picture evidence of 2 clone flywheels exploding but never even heard of anyone blowing up a clone from doing the cheater de-govern thing.
I hate to admit it, but my old 1978 10hp flathead honda still has the governor gear inside with just the outer linkage removed. (i just got lazy and never got around to opening it up) I've raced the crap out of that motor at 5000+rpm for quite awhile now.
But then again its an old honda, not a clone
Doc Sprocket
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I hate to admit it, but my old 1978 10hp flathead honda still has the governor gear inside with just the outer linkage removed. (i just got lazy and never got around to opening it up) I've raced the crap out of that motor at 5000+rpm for quite awhile now.
But then again its an old honda, not a clone
Out of curiosity, do you have something in place to keep the arm from swinging over? I have not opened up my GX340 (still governed, but maxed to about 4200), however when I opened up the clone it seemed to me that if the arm were to swing over far enough the button could fall off, and the arm could interfere with the crank.
Maybe having the outer arm still attached keeps the inner arm from swinging too far, or...?
EDIT- I just realized you said "flathead". I am not intimately familiar with the internals- perhaps the setup is different enough.
anderkart
Moderator
Yep its a 406cc. G400 flathead from the 70's/80's before the GX-series were even made. My original governor linkage arm just simply clamped around the shaft exiting the engine.
All I did was take that linkage rod off and left the governor shaft as-is, but I remember there seemed to be an internal spring holding my governor shaft in place. I couldn't just turn it (or push it in) by hand from the outside.
I really should open this engine up and completely eliminate the governor just in case... I kept thinking I'd do it after I found a race cam/valve springs to fit it, but sadly there's no (direct-fit) race parts available. I did find out my cam gear is nylon and probably wouldnt handle the additional stress of stronger valve springs and/or having my cam re-ground.
Its an awesome motor that develops more torque than a GX390.
Doc Sprocket
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Very, very cool!
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