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Post by blackbomber on Nov 7, 2009 9:31:54 GMT -5
I hope yall don't mind a Yankee joining your ranks. I make no appologies for this fact, but I do hope it's temporary. I've been known to ramble on and on, so I'll give the short version here. I'm a long time 34 year old rider. I have owned 17 motorbikes to date. #17, however, is my first step through scooter. It's a 2006 TN'G Milano. It was manufactured by Benzhou Motorcycles, in mainland China. It's a "rare" (ok, I'm laughing at that also) 50cc two stroke model, the ML492. Apparently, they only imported the two stroke for one year. It has a genuine Yamaha / Minerelli Horizontal engine. I am a vintage enthusiast first and formost. I chose this vehicle because I set a strict budget for myself ($400.00). I just wanted something to ride around the neighborhood on, and to hold me over until my current motorcycle project (a 1971 CB350) is complete. I found this bike in the classifieds non-running for $250.00. It's not pretty, but it's mine, and runs great with a couple of solid afternoons of work. Now that I have the mechanicals in top shape, I'm focusing on cosmetics. When I have it looking up to snuff, I'll begin modifying it.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 7, 2009 9:37:16 GMT -5
post up som pics i love my zuma and that enigne is easy to make go fast fast fast is it a long case or short case engine(this only comes into play for the belt and for some trans mods long=zuma parts short=vino parts)
sorry when i first clicked on your pic wasnt there thats a nice looking scoot
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Post by blackbomber on Nov 7, 2009 9:44:38 GMT -5
I modified the post to add the photo, he he. Not certain about the case length. I was thinking about cracking the cover to get a belt number (for future reference, it seems to run fine), and to measure and weigh my rollers. I'm assuming either the belt length alone will tell, or I can measure between the variator and clutch centers. I'll post back when I find out.
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Post by blackbomber on Nov 7, 2009 9:50:30 GMT -5
Nice Stella, BTW. That's my fave color (never seen in person, though). I briefly considered one. I imagine a 150cc 2T must really run well. I'd probably go for a fixer upper PX first, though. It would probably run me the same price in the long run, but I think I'd be bored with something that was right to begin with.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 7, 2009 9:55:16 GMT -5
thanks well it was a nice stella till i got run over by a cager i go today to pick up the damaged scoot from the shop so i can rebuild her over the winter 150cc 2 stroke is fun but still not fast enough ill be adding some mods to olive over the winter and getting another red one in spring thanks to the ins settlement
when you get ready to mod that thing out let me know and ill give you some sources for great after market parts for yamaha i have looked high and low to find places to get the parts the europeans use in the states and the closest i have come for some of the stuff in canada
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Post by blackbomber on Nov 7, 2009 10:29:54 GMT -5
Sorry to hear about the accident. I guess in Wisconsin, motorists are more likely to notice you if your on an HD. Hope you weren't injured.
I'm in the process of repairing a couple of cracks and broken tabs in my plastic. When that is done, I might as well paint it. The black has grown on me, so I'll probably go gloss black. It was originally seafoam green, but that apparently didn't sit well with the original owner. Again, it was $250, and I needed something to tinker with, so no prob.
I initially spent some time looking at big bore kits, because the previous owner swore up and down that the bike had low compression. What I found was water in the gas, and a loose spark plug. If he did do a compression check, he must not have held the throttle open, because it does run very well, and starts first kick every time (just got a battery, so I'm no longer kicking). My needs are simple. I want a two stroke for nostalgia, a 49cc for the moped status (no reg / ins. required in CT). But I do want to go a solid 45 or more, and not hold up traffic (or have them run me off the road). I also don't want to spend a bunch, because if I really become a step through convert, I'll eventually want either a Stella, or vintage metal bike. I know if I spend $600.00 on one of the "stage two" kits that are being sold, I'd probably be happy. Then I'll be in for $850. I dobut I'd get half of that back. Of course every moment I'm on this, I'm saving on reg and insurance, so if it took me two years to find and restore a vintage PX, I'd break even from that perspective. I'm wondering how it would run with one of the Taiwaneese "sport" 70cc kits, an upjet, and rollers, all else stock (quiet normal looking stock exhuast being a plus). My only point of reference is my last 50, which was a kitted Aprilia RS50 (not SR50). Done with the GOOD stuff: Malossi, Dellorto, Jollymoto, etc. Did a verified 82mph, and was untouchable on backroads (never needed to slow down). The CVT on my TN'G gives a nicer takeoff, with no drama, but after 36mph (gps verified, the speedo says 45) that's all she wrote. I know I can never come close to a 197lb watercooled six speed 68cc Aprilia. Don't want to even try. I was at a different point in life then, when it didn't bother me to flush money down the toilet for no good reason.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 7, 2009 11:09:45 GMT -5
most of the kits arent worth it i peiced mine together for less then 400 bucks and it would do 60 in a tuck and curise at 55
top performance trophy bbk (cast iron 2 ring for durabilty) 160 bucks i rejeted the stock carb 25 bucks for a jet kit stage 6 varatior 85 bucks (you can get an athena for cheaper) leo vince sp3 pipe 129
with the zuma i am hitting 45 on a stock bore that has been derestricted the h/m engines no matter whos you get genuine yamaha or a knock off have a restriction in the port that can be ground out up jeted carb sp3 pipe and varaitor
but i have to order a few parts for next summer 19mm carb and a better pipe to go with my polini corsa lc kit im aiming for 70 this time
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Post by blackbomber on Nov 7, 2009 12:46:40 GMT -5
Is this the restriction you were refering to? What did you use to grind yours? I have an air die grinder, and carbide stones. Attachments:
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Post by Rebel on Nov 7, 2009 18:02:39 GMT -5
Welcome to the forum,
Yes, that 2t can be pumped up to run or out run a 150cc 4 stroke.
Your CB350, I had one of those back in the day, I think mine was a '69, loved that little bike, as most of the other Hondas of the time, Scramblers are really my favorites.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 7, 2009 18:46:59 GMT -5
Is this the restriction you were refering to? What did you use to grind yours? I have an air die grinder, and carbide stones. i would say that looks like the spot check this post out over on my site i can remeber if i posted it over here too (sorry reble im on so many sites its hard to remeber where i psot every thing) scooteraddict.com/forum/index.php?topic=22.0this shop also has some pics and they will do it if you send it to them www.scootertherapy.com/rh50jugpage.html
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Post by Rebel on Nov 8, 2009 2:33:52 GMT -5
No it is not posted here. I have to admit that I'm not seeing what the mod is supposed to really look like. I checked out your pictures and the ones at scooter therapy too. Sometimes a good drawing is more revealing than a photograph.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 8, 2009 8:47:27 GMT -5
it is hard to tell by the photos you actually are not doing anything with the port timing what you are doing is making where the pipe mounts to the bore as big as the gasket if you are familiar with gasket matching then you know what i'm talking about and once you get the outer edge matched to the size of the gasket then you blend it back into the port i would have to say about 1/2 way (you have to feel where the glob ends) ill see if i can make a drawing i'm not good with that kind of stuff
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Nov 8, 2009 8:55:40 GMT -5
ok when you look at your exhaust the red is where the exhaust flows out and the black is part of the "glob" that was cast in to resrtict the flow and the green is where the cyl mounts to the pipe the black part is actualy covered up by the pipe so if you grind it out and blend it back into the port you will get a better flow of exhaust out of the cyl(make sure you do not go so far into the port that you hit the cyl wall with the stock set up you can only raise and widen about 1mm before you really mess things up with the stock port map) Attachments:
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Post by blackbomber on Nov 8, 2009 9:08:57 GMT -5
Thanks both of you for the welcome, and good info. JMKJR72, I think I'm going to give that mod a shot this afternoon. I definately want to go big bore, but this might give me what I need to hit the main roads while I piece something together cheaply. Plus with winter right around the corner, most of my rides will be short ones, many not fully warming up the motor. Better to put that abuse on the stock motor. Thanks for the pics. The process seems to be about what I thought. I have match ported four stroke heads before, and also did hand porting for a well known engine manufacturer in the custom V-Twin aftermarket, using templates. Rebel, I'm not looking to race anyone, but it would be great to be able to ride this thing to work. Probably not going to happen within my budget, because I'll need to be able to go 33 miles each way, and hold 50 for a good part of that. I don't want to commute every day, but it would be pretty cool to do it once in a while. I drive a TDI, so I'm only spending 7 cents per mile on fuel as it is.
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Post by Rebel on Nov 8, 2009 11:35:17 GMT -5
I think you should be able to make a 50cc 2 stroke do 50 with little problem. If you ever put something like a 70cc bbk in it you'll have the power to go much faster, I'm not a 2 stroke person but I understand a reed spacer helps, those thing just confuse me since I've never torn into one.
BTW, we are not just for Southerners here, riding a scooter alone makes you a Rebel. There are people that live in the South that are not Rebels.
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