Update on BMS BiMetro 110  By  beerkeg (Read 1,436 times)

Very nice!
Chances are, if you would change the rear sprocket, to 4t lower, that you won't need to go in 4th gear. And acceleration is just about the same all the way down to 36 or 37T due to less gear shifting.

Your bike has the same gearing as mine. I found it un-usable. too bad the shocks are terrible. But on the positive side of things, once they wear out, they will become softer.
Also, you could check to see if you can't adjust the rear shocks to a lighter setting. sometimes you can adjust the rear spring tension by 4 or 5 settings.
Me, being 160LBS, always set it to lowest setting, but even then, on most bike lowest setting is for 180-200LBS persons.

You may want to consider adding a BEEPER for your turn signals and also a hooking them it up to your brakes. Hooking them up to your brakes is nice because if your sitting at a stop light waiting for the green and all you hear is BEEP BEEP BEEP. So when you have the brake on it does not beep but the turn signal is still blinking, as soon as you release the brake when the light turns green it starts beeping again to remind you to turn them off.
Alleyoop
Here is the beeper I put on:

itistheride.boards.net/index.cgi?board=tt&action=display&thread=14

And here is how to hook them up to the brakes.

itistheride.boards.net/index.cgi?board=tt&action=display&thread=39

Sounds about right. I get 115MPG with my 15/31T sprocket setup and 127cc engine. On my bike I could not change the front sprocket, because I haven't yet found a fitting 16T (that uses the 6-grooves/ribs on the axis, instead of the multi groove systems).

These types of engines have their best torque around 6.5k RPM, so it makes no sense to even use of those last 2k RPM, as you may see that reducing a rear sprocket, or increasing a front sprocket will still result in the same top speed.
I went down 10 tooth on my rear sprocket, and my top speed is still the same, but I'm suffering a bit 'cause of lack of torque.

It makes most sense to change the front sprocket, upping one or two teeth; because front sprockets are cheaper, easier to replace or install, and don't require chain shortening.
But in case that you can't change the front sprocket, changing the rear is just as good.
When stock you have a 15/41T, and you'd change it to a 16/41T, it would be about the same gear ratio as going to a 15/38T setup, but like cat0020 mentioned, it makes more sense to change the front sprocket when you can, than changing the rear (front sprockets go for ~$20-30 shipping included, rear sprockets go for ~$50-65).

[replyingto=alleyoop]alleyoop[/replyingto]AlleyOop.
Mine came with a beeper but it really is not loud enough in busy traffic situations to be heard and I do forget to turn the signal off or push the switch too far and turn on the opposite signal. I'm considering tall rear view mirrors with built in Signals that will be visible in my side vision. More reliable than hearing the beeper. I like the idea of tapping into the brake light too. I had a medical appointment today and rode the bike to and from. Had a long stretch where I used 4th gear and yep she does wind out a bit at higher speeds so likely to make a sprocket change when I get her ready for winter storage. Still have just uner 75 miles on her. Shifting gears is getting a bit easier, not sure if they're loosening a bit or if I'm just getting used to it, maybe both. Still better than 3/4 of the first tank of gas left so she's doing good on MPG. I'm running it on octane per the manual.

+1 cheap fuel will do just fine.
The chinese always overrate their crap, thus oct fuel equals 87oct fuel in USA.
See [[Octane_rating]]

An update on this bike is at hand. I have a few more miles on her now and can say I still like this bike a lot. I do not use 1st gear at all and use mostly 2nd and 3rd in city traffic where I make such frequent stops. I have pretty much mastered the semi automatic tranny and have no problems shifting up or down. I will likely eventually change a sprocket, not sure of front or rear yet just to give her a bit more range and reduce engine rpms in all gears. It is not a problem in my usual riding although I have hit a few spots that I actually was able to use 4th gear and found it could be geared higher. Oil changes have shown virtually zero metal flaking in the old oil. Shifting is still tight and I still miss a gear now and then with poor foot placement.
I have adjusted the front brake to be a bit tighter and need to do the same for the rear as the pedal is pretty soft. I have had to make one panic stop and am happy to report that the drum brakes worked just fine with locking wheels evenly and no tendency to have the rear end come out from under me. It just feels a bit spongy in the pedal. I have used the basket a little bit and have used the center storage rack to carry a 10" android tablet used as a reader. That works fine but find the center rack presents a difficulty mounting and dismounting the seat as these old legs don't want to lift that high anymore so the center rack is going off the bike. A rear carrier is a good possibility and I actually have one from my Benelli m50 which could bolt on easily. It's black and silver and my bike is blue and white so the color is ok as the seat is black and white. I have not yet had saddle bags on it as my bags would touch the muffler on the right side.
I am hoping the ride softens a bit as it can be quite harsh on old bones with numerous injuries in the past. I feel the rear shocks could be softer and cannot comment on the front leading link suspension which also seems quite hard but perhaps necessary to be so. Gas mileage has been excellent. I am close to 100 mpg. but my measuring has not been really accurate. I'm running 87 Octane now and it's doing just fine with that fuel. I have not had to adjust the chain tension yet although I think it may need it as I hear some clanking now and then that sounds like the chain hitting the covers. This bike has a lot of torque in all gears.
Over all this bike has been a far happier experience than the nightmare Benelli M50 turned into. I still feel I just got a lemon on that one and it's going up north to the summer place as a slow speed pleasure rider. I also have a friend there who is a genius with these bikes and he's going to make a winter rebuilding project out of it by totally rebuilding it. Hopefully it will all work better. I would definitely recommend the BMS 110 Bi Metro to others and Superior Motor Sports treated me great all the way through the process of buying the bike. They price matched a dealer I felt uncomfortable with and shipping was fast and easy. The local delivery was simple and right into my garage despite being on an alley with narrow space and low hanging electrical wires. The driver put the bike right inside my garage, he waited as I inspected for damage and was professional and very courteous as well as personable.

Not all do that. Most do, but I have a 250 in the garage that you can't cancel the turn signals by pushing in on the slide. It's like the most annoying thing ever!