I don't need to prove my honesty or intelligence to you guys... but like I said, If you're sure of yourselves... put up some cash and I'll do a video. By the way... my speedo is in MPH only...so even someone of my limited intelligence couldn't make a mistake... LOL
By the way it won't do 60 anymore.. perhaps with a fresh belt?
I find I get more speed with a new belt... as they wear thinner they don't ride as high in the variator.
I have owned many motorcycles over the years and I love bikes...but I also love my little Roketa 50cc scooter.
We all need to be more accepting and respectful with each other... in all aspects of our lives.
We all have our needs and likes and the two wheeler we choose clearly serves those needs and likes so why would anyone else find it necessary to look down their nose?
Honestly I never even knew this was a thing. I'm in CA and riding my scooter I often wave at sport bike riders...and they usually wave back. Yes...I have taken some good nature d ribbing... like once I was at a stop sign and some Vatos pulled up in a super nice low rider... the driver opened up his window and yelled out "Hey... you need a ride?" ... Couldn't help but laugh.
Just go easy... respect each other and all will be right with the world...
By opening up the exhaust and intake a bit... to let the engine breath (and make some RPMs) it will go well above 40. Mine gets to 55 every time I ride it. I'm not telling you it does the 1/4 mile in 4 seconds... it takes a while to wind up but I have had it to 60 on occasion and 55 is a daily occurrence with a bone stock engine with a free flow muffler and a few holes drilled in the air box cover and 14K miles on the clock. Don't believe me? Put some thick money on it and I'll post a video.
I have a 2006 Roketa with a GY6 50cc and I have 14,000 miles on it. I bought it new, gave it a nice easy break-in changed the oil after 500 miles and then every 2000 miles after that. I service the AF every time I change the oil and that's about it. I basically run the piss out out of the little motor. Full throttle all the time, I don't warm it up... just start it...and full throttle! That little motor is literally spinning 8 to 10k RPM all the time for the last 12 years. The only mods I did were an perf. exhaust and I drilled some holes in the stock air filter cover to allow better flow. With those simple mods I gained a lot of power and especially top end speed... topping out at 55mph... I've had it up to 60ph with a tail wind... tach buried, speedo buried ... that little 4 stroke sounded like a two stroke screaming down the road! I really can't believe it never exploded! About 6 months ago I started hearing a weird sort of rumbling rubbing noise from the engine. I checked the flywheel and stator as well as the variator but couldn't figure out where the noise was coming from. The crank spun smoothly and the bearing had no play at all so I didn't think I had a bad crank bearing. I thought maybe it was a timing chain issue? I parked my scooter because I didn't want to break something and I didn't time to dig into the motor. Finally this weekend I checked it out... the timing chain and guides looked ok so I decided to remove the engine and strip it down completely. The engine was in amazingly good shape inside... however when I got the crank out I noticed one of the bearing was a little noisy when spun fast. Turning is by hand it was smooth and quiet. Looking closely with a magnifying glass I saw that one of the balls was all chewed up and I found some metal particles at the bottom of the crankcase. Since I sell scooter parts for a living... I pulled a crank off the shelf and started putting the motor back together. The only other issue I found was the second ring on the piston was stuck in the groove. The end gaps were like new! It is incredible how little wear there was! The cam and rockers looked like new. The valves looked great, in fact, I never adjusted the valves... seriously, they were never touched since new! Since I have piston kits on the shelf and didn't feel like cleaning the old piston... I installed a new one. I toyed with the idea of installing a 100cc kit and new head but I decided against it (I didn't want to deal with carburetion). Also, I love the 150mpg I get... (no exaggeration). Also, the body is showing it's age and I just don't want to put more money or time into my trusty scooter than necessary. Yesterday my son and I button up the motor I checked the valve adjustment and found the exhaust at .004" and the intake slightly less at about .0035 so I left them alone!!! Amazing! We put the motor back in the scooter and I'm back on the road... no more noise! Bottom line... don't let anyone tell you that Chinese scooters are junk... I bought mine new for about $600 and it has served me well and with a new lease on life it will continue to serve me well for years to come.
Post by josht0227 on Sept 20, 2018 13:37:32 GMT -6
I have an odd head here with 56mm stud spacing... I measured with a dial caliper several times and come up with 56mm center to center each time. Also measuring diagonally the stud spacing is 79mm center to center (3.11").
Aside from the odd stud spacing, the head looks just like the QJ heads I have in stock with 2 valve cover bolts and 73mm tall.
Any ideas on this one? I don't know exactly what it's from aside from it's an ATV... but I'll get some more info. I've run into this situation before with ATV engines with reverse... from what I understand the parts are impossible to get. This is the first time I had one of these in my hot little hands... let me know if you want any pics or measurements.