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Post by FrankenMech on Mar 27, 2014 18:36:55 GMT -5
That de-restricting was a failure. The scoot won't run more than 3500RPM. Restrictions replaced or plugged pending the acquisition of some carb jets.
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Post by 2stroked on Mar 28, 2014 9:34:38 GMT -5
Far be it for me to question your knowledge, but do you have a rev limiter on the cdi? That is an impressive list of mods. These things are rather addicting aren't they?
I am sure that you would have eliminated a rev limiter, had you found one, but I had to ask anyway. An electronic rev limiter would cause the low rev/speed condition. I'm not sure if gy6 limiters are the same as a 2t, but if they are it is the green wire coming out of the epoxy on the back of the cdi, and looping back into the epoxy. Just snip and tape. I hope I have not offebded you.
Chris.
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Post by FrankenMech on Mar 28, 2014 18:52:39 GMT -5
You won't offend me. That is a good question. This reverse trike did have a rev limiter module wired to limit the RPMs when the suspension was locked in the upright position. I have no idea if it had a second rev limiting function but it was disconnected and is gone now anyway. Notice in the list of mods above that I don't trust the tach completely. I did go by Horrible Freight today and buy one of their automotive multi-meters which has a tach function to test against the installed tach. I have used several CDI units already.
The scoots are very addictive, but nuts and bolts also scare me.
The increasingly limited RPMs may be due to a mixture problem when I removed the external snorkel on the stock airbox to make room for the side basket. The 3500 RPM limit became more pronounced and power was just -gone- when I opened up the airbox. Otherwise I can think of other ways to limit speed which I have not checked. There could be a restrictive orifice in the intake port below the intake manifold. There could also be a travel restrictor in the slide valve.
I am wondering if there is an easy external adjustable main jet kit to fit this stock carb or if there are other carbs with external adjustments. I shake so bad I would really prefer not to have to take the carb apart each time I swapped out a main jet. Just think of many pieces flying across the cave every time never to be seen again. Did I mention I shake violently??? Back in the dark ages I liked to work on carbs. They were a specialty of mine when I was not out hunting wooly mammoths.... Otherwise I will have to buy a main jet assortment for my 50cc behemoth.
I do have an old A/F mixture meter I can use to monitor the A/F ratio while the engine is running. At least I hope it still works. I used to know what the A/F ratio curve is supposed to look like at various RPMs and throttle openings.
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Post by 90GTVert on Mar 28, 2014 19:16:29 GMT -5
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Post by 2stroked on Mar 28, 2014 19:39:46 GMT -5
Glad I didnt offend.
I did notice the suspension lock limiter cut in your mod list, but it kinda flew over my head. I have never even seen a small displacement reverse trike. Probably won't around here either. Super rural, BOONDOCKS!! lol
Hope the jetting helps. I haven't worked on a 4t50 yet, not sure how the intake is built. Hope you get it figured out.
Good luck.
Chris
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Post by FrankenMech on Mar 28, 2014 20:39:56 GMT -5
Check out the links in my sig. One of them just leads back to this thread but the other goes to the importer's webpage for my trike. If you have any questions about any of the parts or pictures let me know. The RPM limiter had a sealed adjustment pot. Probably for the low speed limit adjust but it could have been for the high speed limit also. The unit could have performed both limit operations the way it was wired. All the unit did is ground out the trigger signal from the stator. I did not like running the trigger signal all over the trike so I wired my repositioned CDI directly to the stator leads. The kill signal wire is the only wire running forward to the ignition switch and handlebar control pod kill switch. The intake on a 4T is essentially an elbow of about 70° or so. One end bolts to the head with two bolts and an O-ring. The other end is clamped around the carb outlet. They have one or two vacuum ports built in for manifold vacuum. On my trike the single vac port operates the fuel pump since it pulsates. The fuel tank is below the floor boards and requires a pump. There are a couple of important handling differences from a two-wheeler. The physics of the front end makes the scoot twitchy. If one wheel encounters resistance of some sort it pulls the trike that direction. I can ride mine on gravel but many people can not. I am working on installing a steering damper on the steering to see if it helps the twitch. That is about a $40 experiment. One cannot ride a R-trike without both hands on the handlebars. The other important difference is that they are an absolute blast in the snow. Fishtailing and donuts are possible  Otherwise they lean to turn just like a two-wheel scoot. Parking is easy, just lock the suspension and set either or both brakes. They will not blow or tip over like a standard scoot. It has a center stand but I almost never use it. A 50cc scoot would be worthless out in the boonies. They are almost worthless in the city especially if there are hills. From my house everywhere else is uphill both ways. I can fairly well keep up with traffic in a 35MPH speed zone but I am an obstruction in a 40-45MPH speed zone. I hope to improve that situation so I am not an obstruction in a 45 zone. State statutes supposedly limit my 'motorized bicycle' to a 30MPH design speed but nobody seems to bother this old AND eccentric geezer. Thanks! |
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Post by 2stroked on Mar 29, 2014 7:54:53 GMT -5
I can't see sig lines on my phone Franken, no biggie, I'll look them up in a bit.
I did look up that dial a jet deal though. Interesting concept.
Couldn't learn much more in the tech article than on the main page. I hooked a cold start primer in that manner.
Sounds plausible, but at 75 bux, I won't be trying it. Only thing that souned iffy to me is that yoi woild need to start way lean for it to work. Then if it is just hukey, u just fried your cylinder. Wonder if there are any independnt tests out there for these?
I always liked the way those can am r-trikes looked, but always figured they wuld handle like crap.
Thirty is the legal limit for scoots here too, but mine cruises at fourty now!
Good luck and hapy scootin'.
Chris
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Post by 90GTVert on Mar 29, 2014 8:00:50 GMT -5
Here's his sig so you can see it
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Post by 2stroked on Mar 29, 2014 8:57:08 GMT -5
Thanks 90GTVert.
I checked your r trike out. Looks cool. I do like the looks, but it looks kinda awkward. Still pretty cool! I wonder how it would ride with a tweaked 2t in the rails? Doh! See, its an addiction! lol
Good luck.
Chris
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Post by FrankenMech on Mar 29, 2014 12:32:49 GMT -5
Mine looks extra ugly now without the front bumper beak thing and three of those Wald folding baskets on it. I nixed the miniscule trunk and fastened a 32L black fold down tote to the rear carrier.
I have an old digital camera here somewhere. Maybe I will try to get some pics today. The camera in my LG flip phone is terrible. The shakes don't seem too horrible at the moment.
The shakes were bad enuf but I took some. I will see how they turned out and try to post a few. I take two or three of each shot in hopes that one will turn out ~OK. I know jack about cameras or scoots.
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Post by FrankenMech on Mar 30, 2014 4:40:25 GMT -5
I found some adjustable jets for those Mikuni carbs and others but they were not anything like that dial-a-jet device. www.kedo.com/products/32285.htmlIf my lathe was up and running I could make one.... That Mikuni carb design lends itself to the task because of that drain plug. I would have to machine the bowl and eliminate the bowl drain on my China carb. More pictures: www.google.com/search?q=adjustable+main+jet+mikuni&newwindow=1&safe=off&tbm=isch&tbo=u&source=univ&sa=X&ei=qd83U-3pN8icrAHV8YG4Cg&ved=0CDsQsAQ&biw=1010&bih=762I got some pics of the Franken-scoot today that turned out ~OK. No Photobucket account yet. I used ImageShack in the past. I had a hell of a time getting the pictures off my camera with my Windows Thin-PC operating system. MS seems to have stripped out anything to do with images out of that embedded OS. I had to pick at it to get it to find that USB mass storage device out there. W-ThinPC was an experiment my son and I tried. Neither of us like W-8 in any form. I have a new OEM copy of Windows 7 home premium SP1 64 bit coming from NewEgg. That was $100 I didn't want to spend. I used to use W-XP pro but it is having more compatibility issues all the time which will get immediately much worse once the full scale intentional destruction campaign commences. I will have to do a lot more work with Win-7 to get it to work with my shakes etc as well as XP did. It is hell getting old and Forked up. I will get a few more hours of sleep and try Photobucket. |
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Post by 90GTVert on Mar 30, 2014 7:01:45 GMT -5
Ah. I don't know if I'd ever seen those jets before. Pretty cool.
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Post by FrankenMech on Mar 30, 2014 15:57:27 GMT -5
When one has 'difficulties' it is sometimes necessary to get creative to get the job done. That includes a lot of research, reading, knowledge, experience, and a bit of Google.  |
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Post by FrankenMech on Mar 31, 2014 19:25:02 GMT -5
I finally managed to get some pictures. Out of 50 pictures a few turned out OK. The 1600x1200 pictures were resized somehow. The scoot is dirty due to riding it around on wet & snowy streets. I have not been brave enough to hose it off yet. 1) Here is the front with the baskets all folded up.  2) The left side.  3) Right side.  4) Baskets and 32L tote extended.  5) Other side. There is some road rash on that right front wheel. There is a plastic shell inserted below the seat for covered storage, -kinda.  6) The front lights, dual white LED corner markers, dual white 27W LED 'spot' lights, and strobe lights.  7) Rear with LED stop light, rear amber strobe lights, and mounting bar for tote(s).  8) The rear again with Tomma the black cat and the new muffler with power plug... It is still loud but not as obnoxious as the OEM muffler without the plug.  9) The 12V 10A power outlet, and un-fused battery jump connector.  10) The dash with handlebar risers, tach/hour meter, strobe control, garage door opener, ignition switch. The battery is inside this plastic housing as well as some other electrical devices.  11) The thumb throttle, kill switch, and hazard switch modifications.  |
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Post by 90GTVert on Mar 31, 2014 19:40:31 GMT -5
Glad you finally got some pics up for us! That thing is a beast. Looks like you can carry a lot and I like how it all folds away, plus the storage doesn't stick out being matching black. All the lighting mods are nice too. Those strobes gotta get attention. Lots and lots of neat stuff. I know I've read the info, but there's something about seeing it.
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Otherwise they lean to turn just like a two-wheel scoot.
