I recently purchased a Sym Jet Euro 50 secondhand. It maxed out at around 30mph flat and 35 downhill. I just took the nylon washer out of the variator and cut off the breather pipe on the exhaust, fitting it with a small muffler. It's loud as hell, but i now hit 35mph on flat and 45mph downhill. I was wondering if there is anything else I can do to increase speed and accel without buying expensive parts??
I don't really know about that particular model, but from what I've read it sounds like they could have exhaust, CDI, and variator restrictions. It seems you've covered the exhaust and vari, so perhaps look into the CDI. If it sounds like a rev limiter when you top out, it's probably limited. The fact that you can get to 45mph downhill might indicate it is capable of revving though.
Tuning the carb, roller or slider weights, and clutch springs are other inexpensive ways to increase performance. Beyond that, you can consider port mods. I suggest reading up before getting into that though.
raelhi: i bought a 150cc 157QMJ engine for 80 bucks, it has compression but the problem is the starter motor housing is cracked, no cvt cover and no shroud
Nov 24, 2013 8:35:38 GMT -5
raelhi: this is the engine: http://honolulu.craigslist.org/oah/mcy/4170079976.html
Nov 24, 2013 9:08:43 GMT -5
raelhi: how do you remove the bushings on the mounting bracket?
Nov 24, 2013 20:40:57 GMT -5
90GTVert: Sometimes you can use a bolt, nut, washer, and socket to remove bushings. Put the bolt through a nut that is small enough to pass through with the bushing, so bushing diameter or just smaller. Put that through the bushing. On the other side, put a socket..
Nov 25, 2013 8:14:47 GMT -5
90GTVert: large enough for the bushing to pass into it, but able to line up with the mount so it has something to be pulled against. Then you'll prob want a washer on the end of the socket nearest the end of the bolt. Then a nut. Tighten and it should pull out.
Nov 25, 2013 8:16:15 GMT -5
90GTVert: Pay close attention as you do it so nothing gets crooked and you don't damage anything. Bolt and nut could actually be on either side, could use a threaded rod and 2 nuts instead of a bolt. As long as it's all braced it can only pull one way.
Nov 25, 2013 8:19:41 GMT -5
twowheelinjim: I've really grown to appreciate these scooters. They respond like a furry pet when given some attention. And, when neglected, they let you know... I've already run into the classic hard starting issues. It is usually caused by a component
Nov 29, 2013 10:25:08 GMT -5
twowheelinjim: like oldsman stated. My 50cc scooter liked the throttle cranked several times allowing the accelerator pump to squirt a bit of fuel into the intake and she started right up. That's how I prime my old Harley. I bet the two bikes were having a chat one night
Nov 29, 2013 10:29:01 GMT -5
twowheelinjim: and that's where the scooter picked up this habit.
Nov 29, 2013 10:29:30 GMT -5
Tony: heyo mech190 the goodyear blimp just droned its way directly over me head... heading over to you !!!
Nov 29, 2013 16:55:35 GMT -5
raelhi: is a gy6 50cc rectifier the same as a 150cc rectifier?
Dec 5, 2013 17:05:12 GMT -5
quikjake: hey can anybody please tell me what bulb size is in my 2007 triton r4?
Dec 6, 2013 3:18:08 GMT -5
quikjake: is it h11? or h7
Dec 6, 2013 3:18:50 GMT -5
90GTVert: My Tritons are both a few years older, but they're BA20D. I assume the newer are the same.
Dec 6, 2013 9:52:17 GMT -5
stupidscooterguy: Just want to shout a big Thank you to all who are helping in http://49ccscoot.proboards.com/thread/7723/2002-moskito-suddenly-power-throt
Dec 12, 2013 0:04:53 GMT -5
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