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Discussion Starter · #1 ·
i picked up a mini quad a few months ago, finally pulled it into my shed/place where i have tools and work on stuff (wouldnt call it a shop, since i dont have any real tools yet.)

i picked it up for $30 and the guy said it ran but something was wrong with the clutch. yesterday i pulled the motor and seen its got a teeny tiny torque converter. Is there anyway to see if that is working without having the motor running and on the bike???

when i spin it by hand it goes smooth for a bit then it feels like its climbing a hill (gets a bit harder to spin at one point in each revolution) is that normal?? does anybody know if thats a problem or normal operation? ill get some pics up here in a bit so you can see which baby tc it has

the mini tc is just adorable :D
 

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Discussion Starter · #6 ·
Thats the same CVT trans I have on my stand-up scooter......Is that thing mounted on the left or right?

Been out riding the scooter and some MX bikes most of the day ...It was pretty good riding weather

it is the same side as the one in your pic. looks same as the one in your pic. are these things any good. im not sure if i even wanna use the mini 4 wheeler for anything, its too small for me and my daughter is only 3 in dec.

i guess it would pull me around wouldnt it? if a pocket bike would i guess this is about the same but probably weighs at least 1/3 more than a pocketbike.
 

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it is the same side as the one in your pic. looks same as the one in your pic. are these things any good. im not sure if i even wanna use the mini 4 wheeler for anything, its too small for me and my daughter is only 3 in dec.

i guess it would pull me around wouldnt it? if a pocket bike would i guess this is about the same but probably weighs at least 1/3 more than a pocketbike.
To ride the quad on asphalt it will do fine but going offroad and riding through puddles isnt recommended....When the belt gets wet it slips.....

What engine is on it ...A piston ported or reeded engine?
 

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Discussion Starter · #8 · (Edited)
its a piston ported engine, looks the same as the one on my cateye, except just a bit different at the exhaust side of the motor. Ill go out and get some pics of the motor now.

i havnt decided what to do with the motor yet. i bought the 4wheeler mainly to get the motor and parts. When santa brings me a mig welder for xmas then i can start thinking about custom toys. i wanna make something fancy. got any ideas?

the motors piston has a dome shaped top, does anybody do anything to the pistons to mod the motor? anybody got a pic of a scalloped piston, someone mentioned they used to do it to old macs but i couldnt quite understand what the process to doing it was. lets just say the guy was no Cam2, when it comes to explaining motors to dummy's
 

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its a piston ported engine, looks the same as the one on my cateye, except just a bit different at the exhaust side of the motor. Ill go out and get some pics of the motor now.

i havnt decided what to do with the motor yet. i bought the 4wheeler mainly to get the motor and parts. When santa brings me a mig welder for xmas then i can start thinking about custom toys. i wanna make something fancy. got any ideas?

the motors piston has a dome shaped top, does anybody do anything to the pistons to mod the motor? anybody got a pic of a scalloped piston, someone mentioned they used to do it to old macs but i couldnt quite understand what the process to doing it was. lets just say the guy was no Cam2, when it comes to explaining motors to dummy's
LOL.....Thanks............As far as a fancy project.....Id take that mini quad add a lil stretch to the rear and refine the seat height/riding position......add kart wheels all the way around,,horstman axle clutch and slap a 80cc twin carbbed methanol huffer in it.........

One of my ideas one time was to take an old tube gokart frame and weld a pocketbike frame onto it together to change the riding position

The engine is the same as the one on my stand-up scooter in the pic...I ported the snot put of it and chopped the top to get the squish extremely tight to where I gotta run 112 VP racegas

As for the piston the scallopping he does is to a flattop piston to keep the flame kernel centerized to the piston to keep as much heat deflected away from the rings...

You want to index the pocketquad engine piston...Heres what I do to my pistons.....I start with a stock head where the exhaust port and intake ports have been widened 1/8" on each side with the exhaust raised 1/8".

I remove the rings from the piston....

I clean the pistontop......

I place the piston back onto the rod,,reinstall the head without a basegasket and roll piston to bottom dead center....youll notice the piston is like a speedbump....

Put thepiston to TDC and make sure that theres no piston skirt impinging on the intake port...if so mark that with a sharpie or scribe the port top shape

Also get a theoretical baseline squish calculation by adding two base screws and using 3/32" diameter soft solder...some heads are within .028"-.033" when the basegasket is removed..If so then indexing the piston wont matter too much......

Take a sharpie or sharp scribe and mark the piston side where it sticks up from port side width above the top ring groove...This material must be removed and reshaped to ease the speedbump

I take a dime and balance it on the dome and take notice how high the dime sits above the crown..Thats about how much gets grinded down.When done the piston is almost flattopped.........

I draw a round circle,,When connected to the scribe lines forms a keyhole shape



Beltsand the center flat and dremel in the channel.......sand the top kind of flat with 150 grit aluminum oxide emery paper,,polish the top.......

stick the piston back in the cylinder and recheck pistontop at BDC....It should impinge less......If so recalculate actual squish

After all checks out I widen the ring grooves 1/64" and deepen them 1/64" too

I bevel the piston skirt edges 45 degrees,,add 4 purge windows in the piston sides facing the fuel transfer ports,,chamfer the holes and reshaped the sideskirts





Then youll want to blueprint the rest of the assembly..........
 

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Discussion Starter · #10 ·
thanks for the explination. im gonna port it and get it cleaned up and running then im gonna break it down and try some of the more in depth mods that you have mentioned. i wanna make one of them cool lookin motors you got that hual A$$.

when you mentioned putting kart tires on the quad were you talking like making it for street only. if so, i like it and want to do it. just gotta wait for santa to get here with my mig welder, im sure it will be a cheap one but im hopin it will be decent enough to do some of the stuff i need it for like stretching frames and making parts and mounts.

have you ever cast your own aluminum?
 

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thanks for the explination. im gonna port it and get it cleaned up and running then im gonna break it down and try some of the more in depth mods that you have mentioned. i wanna make one of them cool lookin motors you got that hual A$$.

when you mentioned putting kart tires on the quad were you talking like making it for street only. if so, i like it and want to do it. just gotta wait for santa to get here with my mig welder, im sure it will be a cheap one but im hopin it will be decent enough to do some of the stuff i need it for like stretching frames and making parts and mounts.

have you ever cast your own aluminum?
Theres a member here named Benefield...He built a quad almost as i explained less the stretch but with kart tires and custom machined hubs for the rear axle......The conversion wasnt cheap but it looks bada$$...he stuck a watercooled pocketbike engine on his.......


I have never casted my own aluminum but have used alum-alloy to repair broken aluminum parts and have welded aluminum aswell.......

As far as the welder being good to do a project like I explained...I have a Cheapo 90 amp Chicago Welder and dont know where to start to all the projects and things Ive made with mine..............

Beginnning of the project...........



End of project...................



My R/C buggy.......I handbuilt 70% and welded the whole thing together...........

Beginning...........



End



I have tons and tons of things Ive built and modded ,,,They all turned out pretty nice..
 

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Discussion Starter · #12 ·
im pulling the motor apart because its nasty, looks like someone kept it in a dog kennel with a pool of oil.

i removed the flywheels and the pull start but cannot get the part with the big copper armeture or the cover with the four magnets to come off the motor, any suggestion how to pull it. then im gonna read your post about pulling the electric start out or the magnets, not sure i gotta refresh my memory and read it through again.
 

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Discussion Starter · #13 ·
id say they turn out nice. badA$$ more like it.

your welder is that a mig or a arc welder? i had a cheapo arc welder and the voltage guage was broken so i couldnt tell what it was set on and when id turn it to the right or left it just would never stop turning, so i couldnt tell where it was on power. but im probably getting the one from harbor frieght, wire fed mig.

oh did he have to have hubs machined for the rear tires on the quad??? i have another larger quad for parts, im hoping when i get my welder i can adapt the disc brakes over to the mini. are there any pics of the other quad you mentioned??? id like to see one so i can start drawing up plans, id like to start working on it the day after christmas.
 

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Discussion Starter · #14 ·
Theres a member here named Benefield...He built a quad almost as i explained less the stretch but with kart tires and custom machined hubs for the rear axle......The conversion wasnt cheap but it looks bada$$...he stuck a watercooled pocketbike engine on his.......


I have never casted my own aluminum but have used alum-alloy to repair broken aluminum parts and have welded aluminum aswell.......

As far as the welder being good to do a project like I explained...I have a Cheapo 90 amp Chicago Welder and dont know where to start to all the projects and things Ive made with mine..............

Beginnning of the project...........



End of project...................



My R/C buggy.......I handbuilt 70% and welded the whole thing together...........

Beginning...........



End



I have tons and tons of things Ive built and modded ,,,They all turned out pretty nice..
i hate to point this out cam, but in one of the pics of the rc buggy i think i see the floor pan is either a new kids on the block or a back street boys lunchbox panel.

is that something youd like to talk about?

im just kidding man, im a huge fan too.
 

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id say they turn out nice. badA$$ more like it.

your welder is that a mig or a arc welder? i had a cheapo arc welder and the voltage guage was broken so i couldnt tell what it was set on and when id turn it to the right or left it just would never stop turning, so i couldnt tell where it was on power. but im probably getting the one from harbor frieght, wire fed mig.

oh did he have to have hubs machined for the rear tires on the quad??? i have another larger quad for parts, im hoping when i get my welder i can adapt the disc brakes over to the mini. are there any pics of the other quad you mentioned??? id like to see one so i can start drawing up plans, id like to start working on it the day after christmas.
90 amp Chicago Electric Mig welder from harbor freight..........Id get alot of different type wire brushes and wire brushes that mount into drill chucks to clean up the rosin slag,,,go slow and keep a tight ground,,also use with a descently powerful powersource rating on the breaker of the circuit used....I have a 100 amp breker coming off my circuit box to run my welder.......I adjust the tune of the weld by utilizing different length cords as per material being welded.............

 

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i hate to point this out cam, but in one of the pics of the rc buggy i think i see the floor pan is either a new kids on the block or a back street boys lunchbox panel.

is that something youd like to talk about?

im just kidding man, im a huge fan too.

LOL...Its not a lunchbox...Its the top of my Dorman Hardware kits...Theres two 590pc metric screw kit sets and 1 370pc sae screwkit sets stacked up holding the frame off the floor the same ground clearance I wanted it to sit...............
 

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Discussion Starter · #17 ·
90 amp Chicago Electric Mig welder from harbor freight..........Id get alot of different type wire brushes and wire brushes that mount into drill chucks to clean up the rosin slag,,,go slow and keep a tight ground,,also use with a descently powerful powersource rating on the breaker of the circuit used....I have a 100 amp breker coming off my circuit box to run my welder.......I adjust the tune of the weld by utilizing different length cords as per material being welded.............

are you talking different length extension cords??? sorry i have never actually mig welded, just oxy/acetyline and arc. so i dont really even know how, just figured i would watch a youtube video or two before i try
 

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are you talking different length extension cords??? sorry i have never actually mig welded, just oxy/acetyline and arc. so i dont really even know how, just figured i would watch a youtube video or two before i try
Mig welding is easy........easier to learn than stick welding..........

And yes I was referring to different length extension cords.....when I weld thinwall and it burns through from too much power even on the minimum setting I adjust the minumum setting lower by adding a 50/75 or 100ft extension cord which in turn lessens the input power to lessen the output voltage to control the burn throughs.................
 

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Discussion Starter · #19 ·
Mig welding is easy........easier to learn than stick welding..........

And yes I was referring to different length extension cords.....when I weld thinwall and it burns through from too much power even on the minimum setting I adjust the minumum setting lower by adding a 50/75 or 100ft extension cord which in turn lessens the input power to lessen the output voltage to control the burn throughs.................
dAng man, brilliant!

I'll be keeping that in mind. Thanks.
 

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Discussion Starter · #20 ·
Mig welding is easy........easier to learn than stick welding..........

And yes I was referring to different length extension cords.....when I weld thinwall and it burns through from too much power even on the minimum setting I adjust the minumum setting lower by adding a 50/75 or 100ft extension cord which in turn lessens the input power to lessen the output voltage to control the burn throughs.................
I

I can not get the armature out of the starter housing, so that I can pop the head off, any ideas how to get it out of there?
 
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