Doin 60-70mph what do i need

[65ShelbyClone]

wow alot of great feedback, could some1 school me on a GX200? maybe a pic and some info on it would be great.i'm not too familiar with that engine
.........
does any1 know of a good website or a place in the LOS ANGELES area that builds, sells motors or has parts for em.

1.) Honda GX200. It's the same high quality engine all the cheap, low quality 6.5hp clones are based on. It is probably the only other engine still in production to compete regularly with the Briggs Animal. If you can find parts for them, the Kohler XKE has a good reputation too. It is bigger and tougher than the GX200 or Animal, but Kohler stopped their kart engine support some time ago.

2.) MDB is the guy to see. I figured he would have dropped in already. :wink:

 

[jim fallon]

no offense L.B. but how old are you ? for some reason you don`t seem to be more then teens hopefully i am wrong !

 

[L.B.ange.]

no offense L.B. but how old are you ? for some reason you don`t seem to be more then teens hopefully i am wrong !

lol i'm 28years old

 

[minidragbike]

If you haven't done 55 yet you don't need to go 70+ mph. It has to be done slowly, and your minibike can't just handle that speed. You will be good at 60, then 65, then 70 mph.

I can build you a motor up easy to get you up to speed. A Honda clone is the cheapest way.

Billet rod, Billet flywheel, flat top piston, Isky .276" cam same as the AGK cam. Heavy duty valve train (expensive)(stainless steel big valves, dual springs, HD push long rods) small chamber 14cc head, fully ported, matching billet intake, tillotson gas, or alky( more power) carb.

Your frame will need to be braced up for strength. Also add a chain tensioner, or motor adjuster, to keep the chain from poping, or motor from sliding back. Stronger roller chain, and at least Azusa rims, with 4 ply tires.

 

[L.B.ange.]

If you haven't done 55 yet you don't need to go 70+ mph. It has to be done slowly, and your minibike can't just handle that speed. You will be good at 60, then 65, then 70 mph.

I can build you a motor up easy to get you up to speed. A Honda clone is the cheapest way.

Billet rod, Billet flywheel, flat top piston, Isky .276" cam same as the AGK cam. Heavy duty valve train (expensive)(stainless steel big valves, dual springs, HD push long rods) small chamber 14cc head, fully ported, matching billet intake, tillotson gas, or alky( more power) carb.

Your frame will need to be braced up for strength. Also add a chain tensioner, or motor adjuster, to keep the chain from poping, or motor from sliding back. Stronger roller chain, and at least Azusa rims, with 4 ply tires.

hell yeah,
thats what i'm talkin about.

heres my frame i got,i got it from a guy in inglewood,i was told its stretched 3 inches,has bearings on the neck and slick on the rear ,he told me it was built to do 70.
i'm new and not to sure,probaly needs reinforcement.i imagine.

do u have a shop can go to to checkout those engines and get a start?

would those harbor frieght engines 6.5 clone work to start with,then have u build it up?

any info would help.


i plan on goin to mansvill this sunday again.

 

[L.B.ange.]

any1have info on this motor,type?

i seen this on craigslist a wile back,the guy was sayin it would do 60 and its alcohol?


any pros and cons on these motors?

i'm leanin towards the clones, but any info on this type of motor would help.

 

[Stang]

It's just a 5HP briggs flathead, billet rod, billet cam (probably dyno) tilltoson carb. Doesn't look like a blockzilla.

 

[L.B.ange.]

where can i find a 4 ply front tire?
i already got a 4 ply slick on the rear

 

[minidragbike]

Just put another one of the same tires on the front, or a small kart tire.

That's a Morgan frame, and yeah they are built pretty strong. You will need to change the back rim to a Azusa, mainly because those stock rims warp all the time. And you will need a engine adjuster. I have a friend that can weld you up a couple for about $50. It's basically two nuts welded to the back of the motor plate with a screw going through them and another nut to lock it down into position.

 

[L.B.ange.]

Just put another one of the same tires on the front, or a small kart tire.

That's a Morgan frame, and yeah they are built pretty strong. You will need to change the back rim to a Azusa, mainly because those stock rims warp all the time. And you will need a engine adjuster. I have a friend that can weld you up a couple for about $50. It's basically two nuts welded to the back of the motor plate with a screw going through them and another nut to lock it down into position.

sounds good

 

[L.B.ange.]

so whats the top speed something like this will do?

it runs on alcohol

so this is just a briggs ?

 

[minidragbike]

We don't know
It doesn't appear to have a stroker crank, and we don't know what size the bore is. Don't know about the porting, cam size, carb size, valve size, etc.

I have one that looks something like that, but has a .400" stroker crank in it. It runs very well.

 

[L.B.ange.]

heres what i was told about this motor

the bored is 25 over the cam is a 436 dyno bilid cam
runs alcohol



what can it do ? ? ? ? ? ? ? ?

50 mph ? ? ? ??
65 mph ? ?? ? ?

never really seen these motors run.
i been told alcohol will run faster ,

any pros and cons with alky vs gas motors ?

 

[65ShelbyClone]

Methanol requires that you drain the fuel system and run gas through it when the engine gets stored for any length of time beyond about 24hrs. If not, it will corrode the fuel system and make a real mess. The benefit is that methanol is good for a 10-15% power increase all by itself. If the engine is built specifically to use it, the gains are even better. It also requires more frequent oil changes.

Gasoline doesn't have any special short-term storage considerations, but it doesn't make as much power as methanol.

 

[Stang]

ugh, come on seriously. How fast you go depends on alot of things besides a picture of an engine.

How tall of a back tire, what RPM the ACTUAL engine reaches, what gears you run.

Knowing information about just the engine won't do any good. Does it LOOK like it could go 50? Yea, sure I could bite and say that. But in the end you will never know until you try. You still didn't say whether it's a long rod, stroked, compression, timing, port work,carb size and plenty of other things.

 

[minidragbike]

Well from the limited picture we have to work with. The intake manifold looks to be a small diameter. So most likely the carb, valves, and ports aren't big. Which still works good, but enough if it was to have been a stroker. It's just not enough flow coming in. Most people with a normal eye can't see this. I will post up a picture so you can see the difference of what i'm talking about.

 

[nostrixoxide]

Well from the limited picture we have to work with. The intake manifold looks to be a small diameter. So most likely the carb, valves, and ports aren't big. Which still works good, but enough if it was to have been a stroker. It's just not enough flow coming in. Most people with a normal eye can't see this. I will post up a picture so you can see the difference of what i'm talking about.

Only thing I don't like about the set up in the picture above is the hose that adapts the carb to the intake manifold. I'm not big on having step's on the fuel/air delivery side of the head. I like for everything to flow smoothly? And with that set up you'll have a nice big step between the rubber & the intake manifold, unless the manifold has been ported super thin in that area. Seems like a little puddling could occur if that wasn't addressed.

Think of what I'm saying as looking at a good exhaust system. Every piece from the front to the back should slip into the next piece, not over? This way there is no impeadence of flow or reduction in scavenging effect...

Just my 2 pennies, but it's a very nice looking motor indeed.

 

[minidragbike]

I already know what your saying. The back of the carb has a 30mm I.D., and the intake manifold at the opening is also has a 30mm I.D. They match perfect with each other, even the outside diameter of each is the same size. The intake started out as being 28mm in the I.D. but then was open up to match the carb.

Everything is nice and smoth, don't worry I'm a pro.:thumbsup:

 

[ogygopsis]

Hey Minidrag...Do you guys run on actual drag strips set up with lights, timers, etc? If you do I would be curious as to what kind of ET's you guys turn and what is your speed in the top end? Do you dyno your motors? If you do; what kind of cid do you generally run and what kind of hp do you get per cubic inch. Thanks....Ogy.

 

[L.B.ange.]

Methanol requires that you drain the fuel system and run gas through it when the engine gets stored for any length of time beyond about 24hrs. If not, it will corrode the fuel system and make a real mess. The benefit is that methanol is good for a 10-15% power increase all by itself. If the engine is built specifically to use it, the gains are even better. It also requires more frequent oil changes.

Gasoline doesn't have any special short-term storage considerations, but it doesn't make as much power as methanol.

thanks 65
i now have a better idea on alky motors