robin
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all the mods i did to mine and it onley dose 4500rpm is that a honda clone becuse all the ones i have real hondas have ballberings on the crank shaft
Performance for the 5hp briggs
- Thread starter biddie_gibbs
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Matt1995
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Yes, my 6.5HP Honda clone has a ball bearing on the crank PTO side.. For the stock 5HP briggs, you CAN remove the govoner, and safely run 5000 rpm. Over that rpm, and the strength of the rod becomes a factor, but a billet ARC rod can take care of that.. For 40 bucks,you can get a tachometer to monitor your rpm of the engine. This is the one i have: http://www.jackssmallengines.com/hour_meter.cfm
Works pretty good, but isnt super fast responsive, but it works as intended. It's shown a max of 5800 rpm on my Harbor freight honda clone, degoverned. It's pushing it for sure.. I sure dont reccomend going over the governed 3600 rpm, but it can be done, and has been done successfully. Just dont push it past 5000, and it will hold together. Use good oil, and change it often.
Jblankster
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yea. just heard a story. my shop teachers friend took the governor on his kart, over reved it. the engine threw a crank counterweight and went into his back.... he is now dead.
mikeandike
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how do you control the speed of an ungoverned engine?
Matt1995
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This is why you use your brain and think smart and safe when you know you are doing something the engine was not made for. This goes for any form of motorsports..ever had a engine flywheel explode? They make scatter shields for this reason. I am making some metal plates to go over the flywheel area and block, on top of the engine and behind the seat for protection. This will catch and block anything like the flywheel and rod that could come out of the engine.
You make it sound like as soon as you take the gov off the engine, it's going to blow up! That's just not true. On the harbor freight motor, its now been used by MANY people, RACING this same engine on racing kart chassis, with a removed governor, up to 6000 rpm. The valves will float over 6k rpm, like a second gov. There have been no reports of exploding flywheels, or broken cranks. Only a few busted rod, one had like 20,000 laps, and one forgot to put oil in it.. If you play it smart, use your head, make sure your parts are in good shape, and take the right precautions, you should be ok. Now if you have a 20 year old stock 5HP briggs motor, i sure wouldnt beat on it at 5000+ rpm! Thats years of engine wear, and fatigued parts. I have brand new engine..brand new parts. I even inspected the internals when i removed the gov gear. I made sure it at least looked ok..
Like i said, removing the gov isnt reccomended, but it can be done. Just be smart, and be careful. I wouldnt do this on an older engine.
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Jblankster
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when the valves float thats a bad thing...
Matt1995
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Do you know anything about a honda or clone engine? Lemme guess, you think the valves will hit the piston right? I guess that would be possible if the engine were an interference engine! These are not. Only bad thing that will happen is loss of power. Its alright, your only 16, dont know as much as you think you do!
Jblankster
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your talkin about the honda flat heads?
i was thinkin OHV like the one i have. i gotta clone honda on my minibike
i was thinkin OHV like the one i have. i gotta clone honda on my minibike
Matt1995
New member
The OHV honda/clone. Just because it's an OHV, doesnt mean its an interfearance engine..the honda is not an interfearnce engine, which means the valves and piston do not occupy the same space, when cam to crank timing is off. During valve "float", valve spring pressure is not enough to keep the valves fully closed at high rpm, and the engine cannot make any more power or rpm, it acts just like a governer. Even still, during valve float, they are not "floating" at full valve lift either...the engine would just shut off or stall if that were the case.. Obviously, on a flathead engine, like the 5HP briggs, the valves are next to the cylinder, so there is no way for vlaves to hit the piston, although they can still float. The valve springs on the honda clone are fairly "soft", so they will float before you can rev it past 6k rpm...with no engine damage! Dont believe me? well its been done already.
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kibble
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Matt1995 FTW!!!!! LOL!
I took off the governor on the engine I'm planning on using for my kart (which is still pending) a long time ago, but like Matt said; you just have to use common sense and safety measures to keep from getting hurt should anything happen to go wrong.
I took off the governor on the engine I'm planning on using for my kart (which is still pending) a long time ago, but like Matt said; you just have to use common sense and safety measures to keep from getting hurt should anything happen to go wrong.
Jblankster
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well my piston hit the valves on my 5hp wit the governor off. so im not gonna do it again.
biddie_gibbs
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Matts got you on that jblankster. no denying it. the man knows his stuff.
Jblankster
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um no, i was stupid wen i first started put in a performance cam and didn't put in stronger springs. so it hit.
and the gov. was removed.
and the gov. was removed.
Matt1995
New member
Peformance cams usually have higher valve lift, which means the valve can stay open with more lift during valve float, and thats why it hit your piston. Same can be true for higher ratio rocker arms.. With all stock parts, valve float wont kill the honda or the honda clone.
biddie_gibbs
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hey can i use this clutch for a mixture of on and offroad use. not extreme offroad use tho:http://www.mfgsupply.com/GoMiniClutchExt.html/mv_session_id=K5Awqksk
it could work good in hard usage?
it could work good in hard usage?
2or3wheels
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which one, i think any clutch would work, as long as gearing is good.
Jblankster
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