baffling

Figured I'd toss this here and see if any of the smart fellers here have any ideas on what's going on. It's a 2012 Yamaha Zuma 125. Fuel injected single cylinder scooter. Been modified with a 155cc big bore kit, cam, and Bazzaz fuel tuner with wideband O2 self-tune module. After all the mods...

Man I got something going on with my bike that's got me baffled. I've had my '05 for about a year and a half and it's got right at 20,000 mi. A few weeks ago it started doing this intermittent thing where I would be sitting at a stop light idling along and it would just die like someone turned...

Ok, so I was riding last weekend with a couple buddies. The bike has fired up fine since I got it in February every time. We stopped for gas and after I filled up it wouldn't start, everything was normal as far as the lights and the noise of the vboost when I turned the key, but it'd try to...

I am posting this for one of my local vmax riders here in MD: He has a 1990 vmax that in stop-and-go traffic when the engine temperature rises, it begins running very badly and has poor off-the-line throttle response (lots of sputtering and spitting to get moving). It is not over-heating...