While riding home from work my SMS 630 started to run poorly, Idle speed has dropped from 1800 rpm to around 1400 rpm and a huge loss of power, struggles to get the front wheel off the ground in first gear. It starts fine and is not making any unusual noises. It's a stock bike except for the basic PU kit and only has done 1000km. Where do I start?
A few possibilities, in order of likelihood: -bad gas -dirty air filter -bad spark plug/wire/coil -bad fuel pump -bad throttle body If the temp sensor goes bad, you usually have trouble starting it. Does the fan run more than normal?
Called my local dealer today and explained the symptoms, he suspects low fuel pressure, goes in for him to look at tomorrow. Will let you know the outcome an if it's covered by warranty.
Found out today it was a bad fuel pump. The pump was making just enough pressure for it to start then run like crap. Still waiting to see if it will be covered by warranty.
I think yours is the first 630 pump failure I've heard of. Do you have ethanol in your fuel in Aus? It was a little work, but I added a fuel pressure gauge under the speedo and a led hooked to the pump wires on top of the speedo. .
We do have ethanol but I refuse to use it. I only run premium 98 octane fuel. I work for the petroleum industry servicing pumps and other stuff, definitely not a fuel contamination issue as I always pay extra attention to which sites do have issues and never fill up there.
