• There were many reasons for the change of the site software, the biggest was security. The age of the old software also meant no server updates for certain programs. There are many benefits to the new software, one of the biggest is the mobile functionality. Ill fix up some stuff in the coming days, we'll also try to get some of the old addons back or the data imported back into the site like the garage. To create a thread or to reply with a post is basically the same as it was in the prior software. The default style of the site is light colored, but i temporarily added a darker colored style, to change you can find a link at the bottom of the site.

Troubling and baffling problem in the "drive line".

2014 RT-S SE6

I have a problem where occasionally but, not always, when I leave my house the Spyder will produce a really loud knock or bang that can be felt through the whole bike. The bike actually feels like the chassis was hit with a hammer. The sound is like a really hard shift but, usually I am in first gear and on rarer occasions, this has done it immediately after shifting into second gear. This banging is usually (but NOT always) done twice in a row in quick succession less than a second apart. It only has done it within a mile of LEAVE my home.

NOW, this could be the cause OR it could be pure coincidence.....The first time it did this about 2 months ago, the township, in it's proverbial "wisdom" decided to "tar and chip" the mile of road leading from my driveway to the main road. SO, I am wondering if the stone chips have anything to do with my symptoms. I thought maybe the chips were getting flung into the belt/sprocket and that is what was causing this. But, I would have expected to see belt damage. The stones are small (1/8"-1/2" diameter) but as tight as the belt seems to fit the sprocket, I would think even a tiny stone would produce a belt problem. The second thing I wonder is that I can hear the stone chips sticking to and getting "flung" from the tires and hitting the inside of the plastic front fenders as well as whatever is getting his from the rear wheel cast-off. It makes me think that maybe there is an internal sensor (such as a knock sensor in a car) that might be "hearing" the stone hits as a problem causing the transmission or the engine to react this way?

Occasionally, on hot days the tar warms up and the stones fling again. Oddly it has NEVER done this returning to my home but always while leaving and in the lowest gears. (as I approach my home, I am usually in a higher gear and downshifting to the driveway. It has never done this further from home (that is away from the "newly" tarred and chipped road) even on stone roads.

As I said, it COULD be coincidental to the tar and chipping of the road OR it could be that it happens when the oil is cooler/thicker? I wonder if there is any transmission issues that could be exacerbated when the oil is thicker? It does NOT do it every time I leave more like 70% of the time. The belt shows no signs of trauma that I can see. The bike runs perfect other than these occasional issues.

Any suggestions?
 
Are you sure it isn't 'backfiring' thru the exhaust?? Many Spyders (& other hi-tech bikes/cars) have a bit of a cough or two that 'bang' like that when the engine & pipes are cold & you first start riding..... just sayin! :sour:
 
Are you sure it isn't 'backfiring' thru the exhaust?? Many Spyders (& other hi-tech bikes/cars) have a bit of a cough or two that 'bang' like that when the engine & pipes are cold & you first start riding..... just sayin! :sour:


First, THANK YOU for "just sayin'"! That's why I posted here. There's much more experience out there than I have had with these machines. Secondly, no.... I have not thought of that. ....other than my theory about the engine or transmission reacting to "noise" from the stones. I would hope that the infamous ROTAX (especially in a 3 cylinder version) would not be back-firing or stumbling like that but, it certainly is a possibility. Also, if this engine has a knock (pre-detonation) sensor it could also be possible that it hears the "pinging" of the stones, retards the timing and a little back-fire becomes even bigger!

I will try and be more aware the next time it happens. It is possible for a back-fire to sound like metal to metal banging AND it certainly would make you feel the stumble in the chassis.

Great idea! Thank you.
 
Back
Top