Pocket Bikes

[HOSS]

OK, I`m still at 50:1 but about to lean this mutha out to 100:1
Outboard ratio. I`m still only running Sthil mix.
Wanna know how to get some r`s outa this bitch? Gotta clock mine but I`m willing to bet that I`m 43 to 47 mph now. Here`s a couple tricks:
align motor(may have to slot yours like mine)
align brakes(leave rear a lil` loose)
take paking material out of silencer
drill small hole in rear silencer cup
aluminum pipe to cover tailpipe(carefully cut to length then re-insert silencer-pipe should fit in cup)
ITS A LOT LOUDER
front tire at 22psi
rear tire at 45 (top end-cause its gonna have bottom after you do these things)
air filter cage(clip out nickle sized plastic oil deflector)
adjust needle to the fifth(lowest) setting-fatten the bitch
I found that #3 was the highest top end almost to the point of wheel wobble but a dead spot on the bottom that idle mixture couldn`t remove. Lowest setting had the whole package.
My next attempt is to open up the venturi maybe .10,,,,maybe
I will be trying stiffer clutch springs soon too as to be in the power band out of the turns.
I`ve got to get a wheelie! Then I`m done.

[HOSS]

Figurred I`d pull this from the Sandbar and put it where it belongs.:D

[HOSS]

Has anyone found different clutch springs? I`ve checked everywhere. I need stiffer ones. This is a 3 shoe setup.

[HOSS]

OK. Took 45 out of the phenolic and 45 out of the back side of the venturi. Nor for the front side. Can`t go bigger than the slide! Will see what I gain.

[HOSS]

****!
Pinhole through the fuel feed vein! JB Weld again.
Where`s that ol` copy of Tractor Pull?:(

[Kim Hanson]

Originally posted by HOSS
****!
Pinhole through the fuel feed vein! JB Weld again.
Where`s that ol` copy of Tractor Pull?:(
Hoss, send me a picture of one these thing's.........( . )( . ).....:cool:

[HOSS]

Look in the Sandbar under Pocket Bikes. Probably the 2nd to last page.

[HOSS]

2nd to last page under Pocket bikes. By now thats on the 2nd or 3rd page.

[LakesOnly]

Hoss, if you're gonna go 100:1, I assume the motor is water cooled.
Try Amsoil Pure Synthetic 100:1, the original, blue-dyed stuff, not any of their other stuff. Start at 70:1 and go up in 10:1 increments. Watch your EGT or cyl head temp as you lean out oil/gas ratio and jet accordingly. Don't forget plug readings
I know kart racers who have run 1 oz/ga (128:1). I ran a shifter kart and ran it at about 60:1. It varies.
Want more power out of your 2-stroke?
Measure Squish:
~~Pull the plug, unravel some thin solder and stick it in the spark plug hole...up against the side of the cylinder (NOT into any port!). Kick it over to flatten the solder between piston and head. Measure with a micrometer and record. Repeat two more times equal thirds around the cylinder. I bet you it's at about .040"-.045" squish clearance. Remove head and turn down so that squish is about .028"-.030". Results: power band the same but motor pulls harder.
Widen exhaust port:
~~Do not widen greater than 65% of bore. Result: Power band same, but motor pulls much harder. May require re-jet.
Raise roof of exhaust port:
(Be careful as two strokes are sensitive to port timing...the smaller the displacement the more sensitive).
~~Raise 0.5 mm at a time. <--BE CAREFUL. Do not go too high, or the little motor will be piss-winding and not producing any power at all. Result: More top end power and higher rpm. Re-jet required.
LO

[HOSS]

Thanks bro. Squash the 100:1 idea. 50:1 is all I`m going. My idle quality is non existant. Haven`t put it together but I milled past the slide. In other words,,,,way too much air for idle. I am going to try jets. The motor isn`t water cooled so the 50:1 is probably all I can do safely.
This motor is a reed design and uses vains or channels along the chamber. I want to do exhaust porting but for now I will have my hands full with the carb issue. I took 45 out! Thats a whole lot of hoggin` for such a small carb.
I`ve thought of compression but am wondering if I would be hurting volumetric effeciency with the crankcase draft induction system.

[HOSS]

Word to the wise: MIC THE SLIDE FIRST! I`m a dumbass. Don`t drill the front more than 9/16! After the slide 5/8 is ok but might want to go a tad smaller because of fuel vain. Screams like a bitch but ZERO idle and very little throttle control. Only at the top. Deffinatley lean now! I am going to bush the front half of the venturi and play with different size bores.

[HOSS]

Front half doesn`t work. Bushing still able to spin thereby would cause slide to hang up. Now just using 5/8 copper tubing to sleeve the whole body. Drilled out to 9/16. Idle screw willhold pipe from spinning inside of carb. I hope.

[HOSS]

Much better idea! Order new carb and drill to 9/16 and say **** this bullshit.:p

[HOSS]

http://www.***boat.com/image_center/data/505/295IMG_0356.JPG
closest I can get to post pics.

[HOSS]

Talked to Ron and its gonna be about 2 weeks till I can get a carb. Good news is they should be about 20 bucks ea.:cool:

[Kim Hanson]

Thats cool Hoss..........( . )( . ).........
http://www.***boat.com/image_center/data/500/72295IMG_0356-med.jpg
:cool:

[HOSS]

Thanks bro! I`m having hell welding my spindle brakets on my go kart right now. Alignment sucks with mild box tubing.:mad:

[CrazyHippy]

9/16 is a bit much too.
Cant get it to idle below way to ****ing fast... Damn
BJH:confused:

[HOSS]

Damn! I`m going to mic the slide channel to see what It can be. I know the top of the channel is 9/16 but tapers a bit to slide size. Mic the slide go a bit under. I`m going to (aft of slide) take out 9/16 and do front half what I can. My phenolic is 5/8. The step down will give me velocity and not necessarily volume. Any lick on milling the jug yet? I haven`t touched exhaust port either. Found some springs. Little tighter. Haven`t tried yet. Will post manufacturer`s name and numbers when I find a good combo.

[CrazyHippy]

Took .050 off the cyl. Pulls harder in the mid range, but nothing groundbreaking. Need to take some more.
BJH:D

[HOSS]

Be cool on the carb. I`ve got a fix. You`re gonna have to use a 5/8 countersunk bit. Not a UniBit! Countersunk. I use them because you have 5 cutting blades instead of 2 like a drill bit. Copper tubing is your fix. Drill 5/8 out of the front only! Not all the way to the slide. 1/2 copper tubing is 5/8 OD. You will cut to length leaving about 1/8 sticking out the front to form your cone. You will do this in a vise with a socket or extension(short-snapon works great) and compress it in the vise to form cone. Demel smooth so choke will fit. Air filter cage will not allow it to pop out and it doesn`t matter IF it spins. Do not drill to the slide with the 5/8! That outa solve your problem. Take something( I use tip cleaners for welder) to open hole in jet. Make sure you set needle in slide to 5th and lowest setting thereby raiseing needle and allowing much more fuel. Go back with the 5/8 as far as you can but DO NOT go to slide. Remember the slide is round so the front and back are closer and farther (respectfully) than is the sides. You`ll be able to save this one!:cool:
I`ll take measurements and post them later as too how far back you can go.

[HOSS]

I`m going to experiment with different carbs form Stihl, Shindaiwa, Echo, and maybe Toro. I would love to play with and 80 carb and may just do that with a KX donor. That way I can rob the entire throttle assembly. I oughta be moving more than enough cfm then.

[CrazyHippy]

Great Idea Hoss!
I'll get that thing sleeved yet.
I looked at the carbs off of Go-Peds, 50 cc sit down scooters(2 and 4 stroke) and my lawnmower, but have not found anything that looks close.... I'll keep looking
BJH:D

[HOSS]

As lomg as it works on a slide type throttle and will pull more cfm. I can make my own spacer.
Right now I`m just hurtin` from a serious crash and burn with my gokart. Gotta reweld my left spindle and get both left side rims. I really don`t know if my femur is broken yet. I`m out for tonight maybe.:(

[HOSS]

Nothing broken except gokart. Extended left front spindle out 3 inches. No more flipping.

[HOSS]

Took some measurements on the slide. It measures .552. That don`t give ya a whole lot to play with since the venturi is already 1/2 inch. I`ll take a bit out the front half and do some polish and mostly cone work and the back half I`ll go 9/16. My phenolic is already drilled to 5/8 with a little flow work on the backside. I`ll at least get velocity which if stand correct should increase my bottom and especially mid range. If I`m right then this should not adjust my power band. I am also starting on a velocity stack with small screen covering it. Anyone know what this will do on a 2 stroke? I`ve seen them on outboards.

[CrazyHippy]

I sleeved the front half, then took a dremel to it, and smoothed from the very front edge till the slide.. it's now a giant funnel:D
Between that and the compression/porting it pulls ALOT harder up top. Seems to be a bit lean now, and has a bit of a bog from a standing start. My Boss is a little tweaked, because it is faster than his sit down scooter thing now and it does 60KmH:D :) :D
BJH

[HOSS]

Did you adjust the needle yet? Also open the jet a bit. Does it idle ok?

[waterloged]

Hay Hoss is your bike the 47 cc or the 49 cc ? I just ordered the 49 cc bike. Is it easy to find parts if I brake this thing?:confused:

[HOSS]

47cc
yes I can get all parts for both of them.
I`m getting a wider back tire for mine.

[waterloged]

well is the 47 & the 49 cc motors the same? Is there a cool web site to find parts for these things on?

[CrazyHippy]

Originally posted by HOSS
Did you adjust the needle yet? Also open the jet a bit. Does it idle ok?
have done both... idles OK now, a bit high for my likes, but it'll do.
Still has a flat spot on acceleration, but it's not that bad.
BJH

[HOSS]

Did you go to the fifth setting? You will probably have to go to a bigger jet size. Drill tha bitch.
Waterlog:
No there isn`t a website to get parts that I know of. What do you need?

[CrazyHippy]

It is as Fat as possible (needle wise). Ran a torch tip cleaner through the jet, it just wasn't enough i guess...:D
Will go bigger, is a 5/16 to big:confused: :rolleyes: :confused: :D
BJH

[HOSS]

If your gonna do that just run the fuel line straight!:D
**** the carb.
Did you get rid of the oil deflector on air filter cage? Did you run the straight pipe over perforated tailpipe?

[waterloged]

Hoss I don't need nothing yet but If I breake something was just curious where to get parts for this thing.

[HOSS]

email me when you do need them. I`m getting a back tire (wider)for mine.
If you have the 49cc bike, just go to home depot for rims and tires. They come on wheel barrows. Exact same thing.:D

[waterloged]

OK Hoss thanks. IT should be here this week then the hot roding can begain! No Home depo here. It will be mail order for me.

[HOSS]

What bike are you getting? The wheelbarrow rims and tires are on the 49cc full ferring bike.

[CrazyHippy]

I got drilled out the oil deflector, couldn't tell a difference. Had pulled the packing from the muffler, it was just a bit tooo loud, so i put it back. I think it needs some more exhaust port timing now.
BJH

[HOSS]

You can`t just remove the packing. You have to find a pipe to fit over tailpipe. I used an aluminum paint stick and cut it to fot perfectly in the cups for silencer. Then drilled a hole in back cup for oil and gases that get in silencer to escape. It WILL sound like a 125 then. But thats when you will get the full benefit from carb mods including fifth setting on slide needle. Miced everything I could and thats all I found to fit. Looks like I haven`t done anything to exhaust because silencer is still there. Yes louder but it unquestionably helped. Noticeable gain. I did my exhaust without carb mods and it got slower. With mods I walked away from my brother`s bike right off the line. You also say you drilled out the oil deflector? I just clip 4 plastic attaching pieces to it. Total removal.

[waterloged]

Hoss I'm getting the 49cc one. Is there a differance between the two? O ya can you ride these on the street, if you have a halmut?

[HOSS]

Not street legal and can`t be made legal either. Biggest difference is the fact that the full ferring bike comes with wheel barrel rims and tires. They sell quicker cause they are taller so people think they are getting a better deal. Reality- whatever floats your boat.

[HOSS]

PACKINAIR? How is yours going?

[CrazyHippy]

This is what I want my bike to run like!!
http://www.pocketbike.com/images/wwwpbcom.mpg
BJH:eek:

[HOSS]

Can`t download it.

[CrazyHippy]

Fixed it
BJH

[HOSS]

Not a problem. I can get a wheelie like he can just riding one takes balls. At least a helmet and leathers.:p
The clutch is the real trick now. Then you could get a wheelie from the line.

[CrazyHippy]

I'm pulling wheelies when it hits the powerband (sometimes not meaning too). Should I be trying sooner??
BJH

[HOSS]

Yes. Its all about balance. And for a small wheelbase such as this it takes balls, practice and balance. I`ve gone over guite a bit. Haven`t masterred it yet. Thats why I need tighter clutch springs. Won`t have to be going as fast. Speed hurts on concrete.

[HOSS]

I did some playin` with the clutch springs. Still haven`t found a replacement tighter spring. I clipped (halfway through bend or hook) some a rebent spring to go on bolt. Not the shoe side of spring. The clutch engages a lilttle later but not much. This didn`t change the spring load so not that much to be ecxpected.
Anyone messed with the exhaust port yet and if so what did you do? I know what LakesOnly posted just wondering if anybody attempted anything yet.

[CrazyHippy]

I raised mine roughly .125" when i had it apart to deck the cylinder. Seems to pull harder on the big end, but no GPS to verify
BJH

[HOSS]

What did you raise? The port entry or exit. Is it still oval or rectangular. Did you try port matching the exit? Cut gasket as well? How much did you shave off the jug?

[HOSS]

Who`s making the website www.minimoto64.com
Infomaniac?:D

[HOSS]

Made a 6th notch in needle. Gained mid but lost top. Also tried bigger jet and lost major rpm.

[HOSS]

Stock jet just ran a welding tip cleaning rod through it. 5th setting. With my clutch springs cut I can almost remove idle screw. Gaines all through the power band. Doesn`t like to idle but starts too easy for me to lose power by screwing in idle screw. I guess I gotta take the plunge on the exhaust port and shave the jug.

[waterloged]

Hay Hoss when you get the right springs, you should start selling them on e-bay:D

[HOSS]

Bad news. The three shoe setup is obsolete. Even if I found springs I`m not gonna waste anymore time on it. The 2 shoe adjustable is the way to go. But when you go to it you have to change drums. The 2 shoe drum is an 80mm size. I also may be going to a 7 tooth sprocket when I do change clutches. Just run these 3 shoe clutches till they go.
I just lowerred and adjusted my front fender to sit right on top of the tire. Looks way cooler.

[HOSS]

Everything you ever wanted to know and then some www.pocketbikeplanet.com
Cool full ferring kits for the 47cc as well!:cool:

[HOSS]

I just thought of something. It looks like the head gasket is about 15 to 20 thousandths thick compressed. I know LawnBoy lawnmowers don`t use a head gasket. They use 515 Loctite instead. I`m gonna try 515 or 518 and see whats up. Also cutting my silencer and tailpipe length in half.

[waterloged]

Well the dam thing just came to me on Friday. It's the trick one! It has everything on it. head lites, tail lites, turn signils. and even a horn. well got to go get some fuel and go try her out!

[HOSS]

problem is that it only does 20mph. Too heavy.

[TRG]

what will it cost me to get into one of these?:D
wy wife is a "CHIPS" nut!...and when she saw HOSS's bike she said "HOLY SHIT! that is the bike that ponch & john rode in the episode at ascott! so now ive gotta find her one as well! ****in australians! they are like the japs and elvis, they know every thing about him!
todd

[HOSS]

cyphersource.com
Ask for Ron, mention your from ***boat. Goin` for about 315 now shipped.

[TRG]

seem too good to be true! at that price...for a pit bike? im gettin one!
thanks hoss!
todd

[HOSS]

I`ve got one red one left for sale. Keeping 2. One is getting frame grafting to accept the Honda GX200. 6.5 hp motor. I just wanna lay down a patch for about 30 feet!:p

[TRG]

i'll think about it! still gotta boat to build!!

[Tom Brown]

I hate to admit it but those bikes are pretty cool. :cool:

[BGMAN203]

hoss,
got any video of you on that bad boy?

[HOSS]

Its not done yet. The one I posted is not mine. I got that from a guy claiming he built it. When questions got deep the line went dead.
I`ll trade ya Tom for that 600!

[Tom Brown]

Done. That GSXR was supposed to be here Friday but didn't make it so it will be here today for sure. :cool:

[HOSS]

:D