I've never experience on any other bike before. Can anyone shed any light?
What it's doing:
I'll be pulling off from a stop at a light, at about 1/2 throttle I'll opening it up to WOT with a fast roll on. Then on preparing to shift, I'll move my foot under the shifter (maybe my foot touches just touches it?) and the bike's power will cut out, revs will drop to maybe below 5k and simultaneous my pipe will emit aae loud backfire. Then the power comes back instantly, spooling back to right into the power band at around 8-9k, slamming my rear suspension and making the bike lurch in a rather unpleasant way.
Now my bike is stock, aka pretty darn lean, it sputters and makes popping little backfires on decel and when quickly opening the throttle, but this is by far the loudest and most startling noise my bike has ever made.
Its more common on a cold engine, but it has happened at all temperatures. It happens almost every time I ride, to the point of it making me rather nervous to shifting out of first.
History:
This happened when I first got the bike, (at ~1000 miles on the odo) and it sort of just stopped doing it after I changed the oil for the first time. 2000 miles later, I drop the bike in a low speed, incident (rain and a pair of idiots). The shifter gets bent (amongst the plastic damage) and my clutch lever takes a firm smack.
What I've done:
I first figured that my clutch cable had become mis-adjusted and wasn't fully engaging, so I tried adjusting it, no change. Now come to think about it, there shouldn't be a backfire if there was just a clutch issue (right guys?). I thought it was just a first gear thing for awhile, until it did it in between 3rd and 4th, and now I'm just confused.
It is an unnerving and potentially unsafe event when it happens in first gear and I'd really like some help to figure out what's going on.
Any input would be greatly appreciated.
Just a bunch of,
Spare Parts
Power cutting out could be hitting the side stand with your foot. If in gear and the side stand goes down, the bike dies.
Check the spring tension on the side stand. Might want to bend the pin on the side stand to get more tension to hold it up against the side stand switch.
Just a guess.....
Quote from: adidasguy on February 23, 2014, 06:52:46 PM
Power cutting out could be hitting the side stand with your foot. If in gear and the side stand goes down, the bike dies.
Check the spring tension on the side stand. Might want to bend the pin on the side stand to get more tension to hold it up against the side stand switch.
Just a guess.....
+1 .. exactly what i first thought .. and Addy here is way more technical than me!!
early on in my gs500 riding (about 3-4 years ago?) ... the way i was resting my boot on the pegs was causing my heel to bump the sidestand and similar effect ... a bit of tightening/aligning the stand and switch plus modifying how my boots were on the pegs... all good!
the backfire thing ... you can deliberately make it backfire by flipping the kill switch on the right grip while you have throttle on.... and the sidestand switch is part of the ignition safety circuit... so you are essentially 'flipping the kill switch' ;)
^ what they said, what you're doing with your foot is essentially what you do with clutchless shifting, so that usually doesn't cause it.
Though you will lurch a bit going from 1st to 2nd clutchless.