BWS 100...thoughts

Hi

Ok, I have given up on my lovely dreams of owning a Hartford Magic 125 (I just dont have the cash for even a second hand one)

So I’m looking into the Yamaha BWS 100…always loved them, because I love the tires…and I live in the mountain.

but but but…many of them smoke. I also had a friend who had one and she always tried to get it to stop smoking and the mechanics said it’s just the way they are. I don’t believe it…I’ve seen 50ccs that smoke less.

have any of you ever owned one or have any thoughts? I HATE how broad they are…going to be a btch squeezing it into parking spaces!

I love my little two stroker. Great stability and handling but a little gutless. I’m putting board racks on mine and making it my beach mobile.

Put a lot of go-fast stickers on it. Make sure you have wire mesh over the headlights. In case you run the La Carre Baja 500.

An off road scooter–ha, ha, ha ,ha… (wow now I know how Fred Smith feels)

Two strokes are like having a stripper for a girlfriend- they’re not terribly reliable, a little too loud, need a lot of care, smoke too much and everyone of your friends wants a ride! But they’re fun to play with. :unamused:

Quottathaweek.

I have owned a BWS for about 4 years now and I think it’s great.

The good:

-They are a bit older and you can buy a rebuilt one in very good shape for as cheap as 20k that will look brand new from second-hand scooter shops. You can find one for probably as cheap as 12-15K from a particular. It won’t look new and all rebuilt, but it could still be in good shape.

Either way the price is right for what you get. Great value, in my opinion.

-All parts are available and you have the choice to buy the original Japanese Yamaha genuine parts, or the knock off Taiwanese version. The Japanese parts can cost up to 6 times more, but for many parts the Made in Taiwan version works just fine. Some parts are worth paying more for the original Japanese. But for things like plastic panels if you crash the bike, the parts are ridiculously cheap. You can change every plastic bit on that scooter for about NT$2,000 and the scooter will look new again.

-2 strokes engine repairs are far cheaper than 4 strokes were you to need engine work. (I can replace piston, sleeve and all gaskets for about NT$1,000.) If done by a mechanic, you could easily find one to do the work for no more than NT$2,500 parts and labor. That’s half than what you would pay for a 4 strokes.

-BWS are simple and easy to troubleshoot and fix. They are very basic and most mechanics have a decent knowledge of these scooters, especially in Yamaha shops.

-BWS are genuine Yamaha scooters, and you get the Yamaha reliability for your bucks. I have ridden my scooter countless times at almost full throttle (90km/hr) for hours on end without any problems. In four years, the scooter has never let me down.

-No oil change, just add 2T oil when the red light goes on. The BWS is actually low maintenance as opposed to what Bubba wrote above.

-BWS is excellent on rainy days if you have the mud tires.

-The big tires make it smoother on bumps than most scooters. It’s a smooth ride.

-The single rear shock design is excellent. The swing arm is more sturdy than any other single rear shock design out there by a big margin.

-Good headlight position providing excellent night driving if you have good quality light bulbs.

-Handy seat opening system right from the ignition- No need to remove the keys from the ignition to unlock the seat.

-And of course, the bike is versatile. You can get off the beaten path and go on mountain roads and trails or on the beach.

The bad:

-Noisy

-Gutless at low speed.

-Gas guzzler

-Smoke- only when the engine is cold. If it smokes when it’s heated up, something is wrong. Often times, it’s just the oil pump lever that doesn’t close all the way because it’s dirty. The flaw is that said lever is poorly engineered in that it is not covered from road grime so it tends to get dirty quickly. It’s easy to clean it up, though.

Things to pay attention to when buying a second-hand BWS.

-Scooter shop rebuild these scooters, but often times they repaint some of the plastic that was not originally coated with paint. The paint will chip and look like crap in no time. Better to chose a scooter with replaced plastic than painted plastic.

-Scooter shops often repaint the rear end of the scooter with gray paint- They repaint the outside of the transmission housing instead of polishing the metal. The tranny housing should be metal, not gray paint. That too will chip and look like shite in no time.

-When test driving the scooter, start it and let it idle for a few minutes. If the bike stalls, this means the bike isn’t tuned properly. It will smoke a bit, but if it smokes a lot, something is not right. After the the “cold engine idle test” is done, take the bike for a spin and make sure to heat the engine right up. Stop and go at full throttle for at least ten minutes until the engine is HOT. Then let the bike idle for a good 5-8 minutes. The scooter should not smoke and the idle speed should remain consistent for the whole time.

-Find an open road to test the scooter’s top speed. You should be able to do at least 90km/hr. If it tops at 80km/hr, then either the engine or the transmission needs work. My BWS tops at 98-100km/hr when the tranny is in good shape. The top speed decreases as the pulleys wear out.

-Most importantly, make sure the scooter has an original Yamaha muffler. Often times, they put a cheap knock off muffler on these scooters a the cost of only NT$800 but they are complete shite and the scooter loses nearly 50% of the performance. Most BWS are aged by now, and I’d say a majority of them have been fitted with a cheap muffler. That’s because the original Yamaha muffler costs NT$6,000!!!

marboulette

wow, thanks for all the tips! Yup, my friend bought hers…and it wasn’t new plastic, just repainted and it chipped very quickly.

The main reason I’m buying it is for those tires…I LOVE them…I have a 125 SYM motorcycle now but I need a scoot for when I need to take my dogs to the vet.

[quote=“Battery9”]wow, thanks for all the tips! Yup, my friend bought hers…and it wasn’t new plastic, just repainted and it chipped very quickly.

The main reason I’m buying it is for those tires…I LOVE them…I have a 125 SYM motorcycle now but I need a scoot for when I need to take my dogs to the vet.[/quote]The only reason to have the blocky tires (apart from the look) is if you’re going to do actual offroading. And then you’d be better off getting a motorbike. I’ve got road tires on my BWS and they’ve got loads of grip and save on fuel.

I don’t think I’d get another BWS though. I’d get a four-stroke scooter instead. The thing is, the stock BWS engine is a bit gutless. Less power than most four-stroke 125s. You can modify it for more power, but that gets expensive and you often get reliability issues as a result. (If I run mine too hard for too long, for example up a long hill, it starts to seize, due to a poor quality aftermarket cylinder).

And they do tend to smoke after a while, due to carbon buildup in the exhaust. It’s annoying and can be quite embarrassing. Sometimes when the bike’s running hot and smoking at stoplights, I turn the engine off because I don’t want to choke the people around me.

Pluses are the relatively low weight, the decent ride height, and the cheapish price. But overall, I really would suggest getting a Duke or something like that.

[quote=“joesax”](If I run mine too hard for too long, for example up a long hill, it starts to seize, due to a poor quality aftermarket cylinder). [/quote]Hmmm… I’ve never had that problem and I have an aftermarket cylinder… Something is not right with your scoot.

[quote]And they do tend to smoke after a while, due to carbon buildup in the exhaust. It’s annoying and can be quite embarrassing. Sometimes when the bike’s running hot and smoking at stoplights, I turn the engine off because I don’t want to choke the people around me.[/quote]Something is definitely wrong with your scoot.

The issues you describe only show that your scooter is in dear need of repairs. I gave Battery 9 some tips to spot scooters with such issues before buying one. If you keep riding it like this without getting it fixed, I can see how annoying it would be for sure. Why not get it fixed instead?

marboulette

[quote=“marboulette”][quote=“joesax”](If I run mine too hard for too long, for example up a long hill, it starts to seize, due to a poor quality aftermarket cylinder). [/quote]Hmmm… I’ve never had that problem and I have an aftermarket cylinder… Something is not right with your scoot.[/quote]Read what I wrote again. Your cylinder may well be fine, but many aren’t very good. And modded two strokes in general do tend to have reliability problems.

[quote=“marboulette”][quote]And they do tend to smoke after a while, due to carbon buildup in the exhaust. It’s annoying and can be quite embarrassing. Sometimes when the bike’s running hot and smoking at stoplights, I turn the engine off because I don’t want to choke the people around me.[/quote]Something is definitely wrong with your scoot.

The issues you describe only show that your scooter is in dear need of repairs. I gave Battery 9 some tips to spot scooters with such issues before buying one. If you keep riding it like this without getting it fixed, I can see how annoying it would be for sure. Why not get it fixed instead?

marboulette[/quote]Every two-stroke tends to get carbon buildups in the exhaust if you’re doing stop-start city riding and not much else. The engines are designed to run fairly hot. If they don’t get hot enough regularly, carbon builds up. It was fine in Taichung where I did longer runs. Here, it smokes. (FYI, I’ve got a new carburettor and it’s still the same).

To my knowledge, most aftermarket sleeves and pistons in Taiwan are relatively OK for just a 100cc scooter. It’s really not that expensive, and I would recommend replacing the piston and sleeve before you damage the crank shaft. You can buy everything you need from a machinist for about NT$1000, and most mechanic will install the lot for about the same price. Heck, a lot of people spend more than that on a night out drinking.

If I may politely suggest, there are two things you can do that would help a lot at a cost of maybe NT$ 200-300 in total.

1-Remove(or get a mechanic to remove) the alternator cover on the right side. It’s just a few screws. You will then clearly see where the throttle cable attaches to the oil pump lever. Spray the crap out of it with carb cleaner, use air pressure to dry it up or wait ten minutes to let it dry on its own and then spray the lever mechanism with a grease spray. While the bike is idling, move the throttle a bit and you will see the lever moving as it increases the oil being pumped into the carb. Release the throttle completely and note how far back the lever stops at idle. Then detach the throttle cable from the lever and see if the lever stops at the same position(it’s spring loaded) without the cable attached. If the lever doesn’t go back as far when the cable is attached, what you have is either a poorly routed throttle cable that doesn’t enable the oil pump lever to move back to idle position or a made in Taiwan throttle cable. In other words, when the bike idles, the pump is pumping too much oil as per the throttle cable tension and the bike smokes because it’s smothered with a mixture that is too rich in oil.

Often times, just cleaning the lever and lubricating it fixes it and enables the oil pump lever to reach its idle position, but other times you may need to replace the throttle cable. Made in Taiwan throttle cables are a tad too short and they make the scooter smoke as they are not long enough to release the oil pump lever to idle position. A genuine Yamaha throttle cable would fix that.

It takes a minute to test the oil pump lever at idle to make sure that it reaches the idle position, so worth having a look anyways. Besides, it’s a good idea to clean and lubricate the oil pump lever once in a while.

2- You can take your exhaust pipe to a welder. Not all welders do this work, but many do. They cut the exhaust pipe open on the inside( 2" x 4" rectangular cut on the inside of the muffler so you will not see it when the muffler is re-installed) and they use an acetylene torch to incinerate the carbon build up. Within five minutes, the carbon is nothing but ashes. Then they weld the incision back. Done! You have a new exhaust pipe and they charge a maximum of NT$ 300. You can have that done again every year or so if you only do city riding. It’s cheap and the scooter actually gains performance, too. I had it done on my scooter a while back. Well worth it.

I know you did not ask for it, but I’m just trying to help. I hope it’s OK.

marboulette.

PGO made a similar fat-tyred “off-road” style machine (PMX I think) that was smaller and, to my eye, neater-looking, but they are pretty rare.

Discussed (a bit, though its mostly about the superiority of road tyres over mud tyres) here

forumosa.com/taiwan/viewtopi … ht=BWS+PGO

[quote]The single rear shock design is excellent. The swing arm is more sturdy than any other single rear shock design out there by a big margin.

[/quote]

Bobepine (a BWS enthusiast, I think its fair to say) reports a rear-shock design fault here:

forumosa.com/taiwan/viewtopi … =BWS+SHOCK

Bobepine (a BWS enthusiast, I think its fair to say) reports a rear-shock design fault here:

forumosa.com/taiwan/viewtopi … =BWS+SHOCK[/quote]

Nicely researched… Indeed, the shock needs to be replaced every few years because it can break after several years as seen in the thread you linked. The excellent design has to do with the swing-arm, not the shock itself.

marboulette

I’ve had my BWS now for 2 1/2 years and it’s perfect.
Only changed the battery (when I got it), a rear and front tyre, a throttle cable and an exhaust.
I use to have a 150cc 2-stroke road bike (NSR copy Kymco) and it was a little fast, for build up areas, and gave me LOTS of problems.
Now with the BWS I’m still able to pull ahead of most scooters and stay in front and cruise a more respectable 80 km/h.
I find not too many scooters pass me and it prevents me from riding to fast. Even with 2 people on it still goes 80 km/h which might be a bit slow for Taipei but out here it’s perfect.

I have a BWS too, and I like it, yeah but it sometimes gives me problems. They are work horses though. The tires are a little expensive, but if your never going to go off road you can find better street tires. They even make exhausts for them.