79cc, 2-stroke, reed induction, 3-speed, auto clutch, oil injected. What a great little bike! I got one of these back on December 7th 1985 brand spankin' new. It's what got me into bikes. I rode that thing for almost 3 years before I outgrew it & started breaking stuff on every outing. I sold it to some lucky bastard for $150 back in '88.
My first foray into the want ad realm too ....
Anyway fast forward 20 + years later. I went on an eBay buying spree around '07-'08 & bought every BW80 I saw. One I restored for myself to rip around the neighborhood on. Has 148 psi compression, Boyesen reeds & a FMF pipe. Will just about pick the front wheel up! Not bad for an auto-clutch. I've fixed up & sold about 5 of these .... and some I've bought back & re-sold.
The motors are indestructible on these ( unless you forget to fill the tank under the seat with 2-stroke oil ). They run forever. Of the 15 or so of these I've owned, most are only on their 2nd bore. Some are on their 3rd or 4th, and my keeper was on the original piston & rings when I bought it, now on it's 2nd. Very simple design & esy to work on. You can literally rebuild one of these in 15 minutes! Most of the parts are shared with the PW80, so parts are everywhere. The exceptions revolve around the fat tires of the BW: gas tank, seat, fenders, & transmission countershaft. There are some small differences inside the carburetor too, but a PW carb will work just fine on a BW.
As of now I have 8. I gotta get my ass in gear & get some of these running & sold .... but anyway, here's some pics:
Here's how the restored one started out:
The goodies -- Wiseco piston & bored/sandblasted cylinder :
Looks a little better now:
Part of the collection: