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Post by bigkahuna427 on Feb 18, 2011 17:35:04 GMT -5
Hopefully it will have the engine code "1E40QMB" on it in the rear of the CVT trans area, up top, just ahead of the shock mount. Also, look over pics of these engines and you'll have a good idea. There are TONS of pics of these motors all over this site. 49ccscoot.proboards.com/index.cgi?board=yamajogWow! That is an impressive amount of information you have there! So, is this the same motor in a Zuma? |
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Post by 90GTVert on Feb 18, 2011 19:09:34 GMT -5
Yeah, basically. There are differences from engine to engine, but nothing you need to worry about till you have one and are ordering parts really.
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Post by bigkahuna427 on Feb 20, 2011 11:02:54 GMT -5
So, I have done some more research. I found some info that suggested these 2003 Geely scooters chain drive no transmission were 1.8 horsepower? Seems like that might be enough to run a table saw...... I then started trying to find specs for the '03 models and it seemed there are new models of these I am finding online suggesting they are 2.8 horsepower and good for 25 to 30 MPH? I guess I would be OK if I could get 30 out of a scoot advertised as doing 35 but not 25 out of a scoot that would do 30 with a 100 pound rider and wind at his back. Is there anything I can do to get another 5MPH out of these? I have read about cutting a green wire on the CDI to disable the rev limiter.
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Post by 90GTVert on Feb 20, 2011 12:03:27 GMT -5
I really have no experience with these, so It's kinda hard for me to say what they're capable of. I've only been around 1 that I know of, and that was before I cared too much about scoots and I didn't pay attention to it. I just know it was slow. I'm sure you can get 5MPH out of them, but you might have to work for it. Without really knowing what to tell you to expect, the best thing I can say is to get them in tune first and see what these particular scoots really do. Maybe it'll be enough that you won't mind it for a little bit. If not, determine if your goals are reasonable. If it's doing much more than 5MPH under the minimum speed you want, it may be more practical to sell and move on to a better platform. If it's close you what you are looking for, the small big bore kit, doing some port work or maybe timing modifications via base gaskets might do it. Not really sure if you'll be able to compensate for the loss in low end power that port and timing mods could create though. On most CVT scoots you'd lighten the roller weights and/or add stiffer clutch springs to keep the revs up. Dunno if there's much you can do with these transmissions.Check out the exhausts and see how restrictive they look. Not really sure about the ignition systems on those. I wanna say they don't use a CDI, but I may be mistaken.
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Post by Fox on Feb 20, 2011 12:05:40 GMT -5
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Post by reveeen on Feb 20, 2011 14:05:08 GMT -5
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Post by bigkahuna427 on Feb 20, 2011 16:59:36 GMT -5
I still cannot fathom what you guys are saying about this ignition there has to be switching on the primary side of the coil either points or an electronic control. |
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Post by Fox on Feb 20, 2011 20:51:43 GMT -5
I think what they mean is there's no points or CDI to control the spark timing. The flywheel has a strategically placed magnet so plate the stator/magneto coils sit on can be rotated some to change the timing.  |
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Post by bigkahuna427 on Feb 21, 2011 9:05:40 GMT -5
I think what they mean is there's no points or CDI to control the spark timing. The flywheel has a strategically placed magnet so plate the stator/magneto coils sit on can be rotated some to change the timing. A coil is basically a step up transformer. The magnetic field around the primary winding needs to be broken cleanly by a switch to get the built up magentic field to then collapse into the secondary windings. If there is another way of doing this than I am not aware of it. Even a lawn mower has points at least in the old days... |
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