Grey Iron, my 1943 Westfield bike build

LS614

Active Member
Hi guys. I have a build under way and figured I would share it with all of you! I summer of 2024 I saw an antique bicycle at a thrift store and knew I needed to buy it and motorize it. I started doing motorized bikes when I was 16 and now that I'm 30 and a dad, I'm back at it. My wife doesn't exactly understand it, but she's happy that I'm happy lol. Anyway the bike is a 1943 Westfield. Doing some digging I found that this was one of very few bikes not issued to the troops during ww2. Only a few hundred were released to general consumers that year. The poor bike had been abused as a poorly painted lawn ornament, probably for decades. The second I saw it though, I fell in love. I started by getting an 80cc China girl kit and just kept going from there. I stripped the bike down and removed the paint. I am using alloy wheels in order to add v brakes. I have a clamp on cnc sprocket and a spring loaded tensioner. I got brown tires with cream sidewalls for it, bolt on adapters to add rear v brakes, an upgraded throttle by nibbi. I followed the roll your own cdi thread and made my cdi circuit from scratch. I made a box to house the ignition components out of an old Briggs and Stratton air filter box. The fuel tank is a vintage Briggs and Stratton tank as well. I kept the nt carb because they're so easy to tune, but I did purchase an expansion chamber. I've also ported and polished the engine. The pics might not be in exact order, forgive me, but the build is going strong and I will continue to post as I go! Thanks for looking
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What chamber did you order? Real MZ65 pipes are only 50 bucks on eBay right now. I suggest the black and white clutch pads. Sweet looking bike!
 
What chamber did you order? Real MZ65 pipes are only 50 bucks on eBay right now. I suggest the black and white clutch pads. Sweet looking bike!
The chamber is a 2 piece expansion pipe that wraps around the frame, I'll post a Pic today of it! The clutch pads I made out of a metallic and asbestos friction material I bought from grainger. I've used it previously and it's very grippy and wears very slowly.
Looks like a great start! (^)
Thank you! I've admired your work for a long time
 
Continued doing my mock up. I used a spade bit and hole saw to make custom rubber mounts. The handlebars are set up the way I want and I'm feeling pretty happy with how things are going so far
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