Motorized Bike Engine Rebuild




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Laury Pontier: Hammer time

Mr. Nice Guy: how do you get the sprocket of, do you need a spacial puller? 

Kielar Hansen: The red stuff is rtv sealant 

Rolands Strods: tu tak esi meistars

Owen LaBounty: whats the red gasket stuff you used?????

Marcelo Arrizabalaga: Too slow....

alex dias: 50cc

Reinier Basson: i liked how he went from working on his feet to working on a table with gloves on 

Jason Teasdale: You can get a full gasket kit for these engines for about $13.......

arthur clark: Great video,thanks.

BayouBluesMan: dude u use as little permatex as possible with a razor blade or else when pressed itll overun into the engine

Ericktronik: Hola amigo , te escribo desde Colombia, es muy valioso tu aporte de enseñar a quienes no sabemos mecanica de estos motores, PERO el video pasa muy rapido y no se ven bien los detalles, que serian muy importantes, deberias subir tres o cuatro videos pero a velocidad normal , GRACIAS!

im b a t m a n: man you put way to much gasket sealer on i bet half of your transfer ports are covered. it is always better to use real gaskets. they last longer and these engines rely on them so that they have proper timing.

MrSousa909: Holy cow i had to rewind to make sure i just saw what i saw! hammering a bearing in? o gawd

pprriimmoopro: yeep thanks for the info.. i did already get a complete gasket replacement :)

pprriimmoopro: @Ericktronik Oye gracias por tu sugerencia, haré algunos video como dices la próxima vez... Gracias un montón:

arthur clark: What to do is what you need not do if you can't rely on the basics,These engines are tough enough to go 11.1 compression on 97 octane but not intended to run down the interstate. Granted machine shop high speed balancing the assembly is likely expensive if you can get it done so 1 or two ounces a distance from the crankshaft center can be done on a drill press rod and forged piston if you want to stand there throttle wide open awaiting detonation....

Fabian Fischer: You have no idea as to the failure of your engine rebuild. The centre gasket is essential to spacing the dimensions of the case halves to give clearance to the crankshaft. The most important part of the engine rebuild is the centre halve case gasket. TOTAL FAIL

thedudewhoiskickass: i that a bearing u hammerd in at 0:15? where can you buy those? what are they called

safe biker: you should use a rubber hammer i cracked a chainsaw engine using a regular hammer once i wasent even hitting hard just tapping it

RentAnEducation: People looking for these kinds of videos are usually expecting explanations, and instruction. This is just a music video.

pprriimmoopro: NOpe nothing to do with the baring cuz the air only pass true the cylinder not the baring.. if there is a HI compression in ur engine means there more power is no compression means ur piston or the cylinder wall is damage. but to masseur properly u need to have a compress gauge to check for leak and compression ratio.

StrictlyEuroRacing1: So did it run? Probably not, no video of it running. That was a crapty build overall.

bikr1975: ohh, i meant, it was my fault i never rebuilt the engine or cleaned it free of built up deposits. anyways, whats your experience with these engines? have you done your own little successful experiments for more power or what? thanks again for your reply :)

pprriimmoopro: you mean the hammer? or the bearing? if the hammer is called rubber mallet or another type called iron hammer. If the bearing is call seal bearing..

arthur clark: Like the video once again,These engines are the easiest to assemble and reassemble without doubt.I'd planned to enhance the basic Stinger but have to pay for machining of the piece itself.I'd rather build a turbo charger out of a small billet of aluminium for it very little to it no less until I pick up some tools I'll have to be content...Boy Go Fast !

bikr1975: hmmm....thats interesting about lightening the flywheel weights and yes, i think i found the culprit. it was some little bits of loosened carbon residue the caused the scouring inside the cylinder chamber. i think that may cause piston lockup. anyways, the two head bolts that screw into the crancase body have ripped themselves completely out! ugh!!! why? lol....its a guy thing to keep experimenting to find more power and progress of finding out what NOT to do ;) yup, IT WAS ME THIS TIME! :)

thedudewhoiskickass: the bearings are the same size. they are called 6202 15x35x11 bearing look on ebay go to motorbicycling com and search for: The Bearing Doctor awesome threads bout bearings. there is a total of 4 bearings of this type you remove the seals on the crankbearing whaen you buy it

pprriimmoopro: yea i know.. but at that point of time i dont have a rubber mallet.. haha :)

safe biker: lol i want to get one of these or should i just keep my yamaha jog scooter i like these because you can put it on front of a bus and cary up stairs

bikr1975: hi, i have a replacement 66cc engine that i bought used and its got some serious issues. bevel gear and stator bearings are almost completely trashed. tons of play in them and also, theres very little power compared to the 2013 year 66cc motor i had. no one seems to know the P.S.I. for the compression and also, how a carb cleaned tons of times already, could be the cause for the power loss. the newer engine had tons of low end power and torque but this older one doesnt.

Daniel Smith: got problem spiting oil side of muffler there's two metal gaskets should i only use 1 and should i put gasket sealant high temp one more thing adjustment of the clutch arm the clutch (pin) if concave should i get a new pin ?

thedudewhoiskickass: yes the bearing thanks

Joel Lynch: worst ever, , , , only helpfull if we are on crakc and able to keep up, you want to make a usefull rebuild video start again and do it with gaskets and sealent and threadlock, and hammer is only needed if oyu dont know what your doing

thedudewhoiskickass: over the summer only on weekends and not going for ling trips. i will rebuild it in the spring i think

pprriimmoopro: your engine still wont start now? have u change the spark plug wire and the spark plug head?

jumpa01: this is just a video of "Look what I did " there is no information taught here , nothing to be learned

Felipe Cobu: Use paper gaskets, don't use RTV only, it changes the port times and make you engine runs poorly. Also put the bottom end together w/o the gasket can make the crank too wide for the case and seize it's bearing very fast.

ThunderHead289: just saing from an expirienced automotive perspective, not using gaskets will make the engine parts not be the correct distance apart. also lose the hammer. ive seen worse though.

thedudewhoiskickass: i live in sweden so i want to order from ebay.do you know the size of the bearing innerdiameter, outerdiameter and with?

pprriimmoopro: Yes it did run smooth and steady :p i just have no time to do bike check, so i don't record video often.

arthur clark: HEY ! looks to me that someone has incorrectly light'n the crankshaft on the assembly in the opening picture of the assembly.The counters can be drilled out but the featured above is weakened by what appears to be router grove a little to deep little to close to the crankshaft center line.It will break if so.

arthur clark: The fuel only enter the cylinder the piston keeps it out of the crankcase,only one way it can a damaged piston or cylinder.The engine featured appears to be a stinger probably the best of all of them.With a machine shop available mill off the cylinder @ top to 11.1 and light'n the crankshaft counter weights by drilling 2 sets of holes 4 or 5 each side.This easily double the power with changing port timing or economy but will need high test gas.keep the old engine if it's identical to the above.

airwalker13: Hey! You're not done! You forgot to put the nut onto the front right mounting stud!

Daniel Smith: ya got to seal up all the holes around the magneto and plate and dip the magneto in wd-40 so no moisture can get in and fry your magneto

TheMaplesyrupmaker: how did you do the rings

pprriimmoopro: you wan to get the motorized bike engine kit?

jonnijames: It was the magneto, such a shame, replaced it and good as gold and firing again, thanks for ya concern.

jonnijames: Nice vid, can ya do a OHM check on your Magneto C shaped circuit and one of your CDI blue and black wires and tell me what you come up with? Check my video out, my engine wont start and I need to size up specs with others with the same motor type. thanks for helping if ya can ( U Toob D 0 t com ) /watch?v=7S28ovQ--ok

arthur clark: the 11.1 compression will likely hold up until you demand full throttle all day without some remorse to back off unless prepped
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Motorized bike engine rebuild 4.5 out of 5

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Motorized bike engine rebuild