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That's odd....I even upgraded my rear spring, but it still couldn't handle the two of us without bottoming.
I'm over 200# but my wife is petite.....
i'm right at 200 and the wife is 1/3 less. i never did the rear spring and we managed. with the tw, i had to up grade the rear spring. now we are on a suzuki dr200 and the springs seem fine
 
So, what had happened was...

I'm actually on the board of directors for Yamaha. They've actually asked me a few times if they should put some fuel injectors on the TW, but my Japanese is bad. I was gonna say yes, but I can't remember how to say yes in Japanese.
Hai (pronounced like hi in English)

Get with it ;) :D
 
I live at 5500 ft. and ride mainly that elevation and higher. Never had a problem with sputtering or anything. Possible my dealership actually did something right and jetted it proper for the elevation here upon assembly, but I've seen the goons in their shop so I'm guessing no. I love this bike FOR its simplicity, and wouldn't want to complicate it. For reasons stated before, out on the trail, in the middle of BFE. In rural NV, we are desolate, and cell towers are only located along I-80 and near towns. The only places with more distance between towns is AK and probably WY. I don't feel like pushing a EFI broke down bike 70 miles to the nearest dwelling to call for a truck to get my shit home. I stand a better chance of being abducted by aliens. Maybe they'd hook the LCpl. up with some E.T. tech. Warp core, cold fusion, cloaking, and all it would cost is a probe in my ass. Put that in your pipe and smoke it.
 
OKAY OKAY, MT, ND, and SD too. Sheesh!
 
That lean factory jetting actually works out rather well for us mile high denizens. Those sea level TW types who enrichen things significantly are the ones who seem to sputter and act unhappy at elevation.
 
That lean factory jetting actually works out rather well for us mile high denizens. Those sea level TW types who enrichen things significantly are the ones who seem to sputter and act unhappy at elevation.
Your're right! My 130 main jet is great at home(around 1000') but in Utah my bike would sputter and miss at high RPM's when over 6000 ft elevation. My buddy with stock jetting had less of a problem.
 
Hey gang,
Just wondering. When I began my search for a small, run-a-round semi-dirt/street toy, I actually was interested in a Honda "Monkey Bike". Most of you are aware of its attributes and one of them being it's FUEL INJECTED. Well, it's a long story but, I shied away from a $5,400 out-the-door price tag for such a small bike and, with limited intended use. So, my next choice was the Suzuki VanVan. First off, what kind of a name is "VanVan". Who, in their right mind, came up with that? Anyway, that bike, in case some you are not aware, is almost, I say ALMOST a clone to the TW200. Only it's a bit more oriented to street use, as opposed to the intended dual use of a TW. But, in any case, it's a 200 cc FUEL INJECTED bike. I watched and read a few reviews and well, it ended up that, it too was gonna have a bit too high of an out-the-door price. My plan for this purchase was just for goofing around on in situations like light off roading and squirling around on the street some. I got a giant Goldwing for any serious travels.

Anyway, Yamaha surely has some of its lineup that is FUEL INJECTED, don't they? Their little TW 200 is now 30 years old and from what I can tell, it's still a hot ticket for Yamaha. And, especially in this day and age where emmisions and fuel mileage is always a hot topic, why, WHY then, has Yamaha not thrown a very basic fuel injection system on these rather well selling motorcycles? I mean, that little 125 cc in the Monkey bike is fuel injected, as well as the 200 cc in the VanVan. And, I've not really done a bunch of research on any other models of any other manufacturer or, even in the same manufacturers, in the same cc category to see just what's fuel injected and what's not.

I know and realize that fuel injection might be a bit more costly to design and install but, hey, as any manufacturer knows, it's a SERIOUSLY better fuel system than a carburetor. It doesn't care about attitude or altitude or, ambient temp or anything. It just takes care of itself. So, just wondering why Yamaha hasn't thrown on fuel injection onto these, ever so popular bikes?
Scott

P.S.
We're on a trip right now traveling and camping at various points in AZ, UT, CO, NB, ID, OR and maybe a few others. I setup the TW on a "versa hauler", on the back of the motorhome and, we're also towing our Jeep JKUR. While sitting around our camp sites, we've gotten more pleasant comments about the TW than I would have ever expected. I've even been offered to sell it. Ain't gonna happen, at this point in time. Anyway, sure seems a lot of guys (and even some women) sure like that little bike.
Scott
Lol Ik I’m late to this but a mechanical fuel injection would be much simpler it is the successor to carbs but the predecessor to efi it uses a fuel pump and air pressure based of the throttle position very reliable very predictable idk why they didn’t use this method
 
Computers and fuel injection definitely make horsepower. [Back in my drag race days a top fuel car maybe could eek out 1500 to 2000 hp. With today's computers they easily double that. Just more precise and efficient.]
But carbs are simple and easily fixed out on the trail. Keeping bike simple keeps price down, no r&d needed. Emissions are what has got rid of most engines with carbs, not customer demand [precise mixtures].
Today's top fuel dragsters make 11,000HP, according to the NHRA: Drag Racing Classes.
 
My understanding is that the old design carbureted bikes are grandfathered under the EPA/emissions rules. As long as they don't change them (other than cosmetics like colours, and safety things like disc brakes over drum - although this sounds debatable with the TW?), they can keep producing them. Look at the KLR650 - they 'killed' it, then brought it back with EFI, and a few small changes, but substantially the same bike, but had to go through emissions certification, which costs $. If they made any changes to the TW engine/drivetrain, they'd have to certify them under the current emissions laws, rather than 1987 emissions laws. The simple fact is that Yamaha keeps selling TW's just as they are, so there's no need for them to change. As long as people keep buying them as they are, there's no need to change them.

I do have to say that I'm in the EFI camp - I'd prefer fuel injection. People talk about getting stranded with EFI, but how often does that actually happen? How often do people have problems with their carb in comparison? I can let an EFI bike sit all winter, and in the spring it starts right up. Several carb'd bikes I've owned have required removal and cleaning of the carb after sitting sometimes for only a few weeks. I have to say the KLR650 I had started up fairly easily after sitting for almost 2 years (fuel stabilizer in the tank, battery tender plugged in). However, I've had to clean the carb in the TW200 twice and I've only owned it for 3 months. Would you prefer your brand new car to have a carburetor in it, rather than fuel injection? I feel that fuel injection is superior to a carb.
 
The old V12 Jags ('76) used to be fuel injected - so that when you lifted the bonnet (hood to you lot) and found a bunch of Webers, you knew the engine had caught fire at some point - something to do with "cost" .......
That fuel injection is why do many USA Jag V12's now run with a Ford small block V8.

Sent from my Pixel 3a XL using Tapatalk
 
Yamaha, for most likely cost reasons, still runs a carb on these small bikes.
You answered your own question. R&D + retooling + production changes cost $ & resources. The TW sells well as is & at it’s price point.

Yamaha has done the math.
 
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Made me think of this video:

I was wondering how long I was going to have to read this thread before someone posted a link to this video.

Must be an age thing lately but I prefer simple over complex most times. (Especially with the opposite sex). Anyway I am in the carb camp on the TW. Wishing for something else suggests perhaps another tool is more appropriate than the “farm” bike (remembering her roots) that this beloved little cycle is.
 
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