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Enduro Engine - 2 stroke Cylinder, Piston, Tranny, Bearings, Clutch, Pipes & Silencers, etc. |
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#1
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New 2010 EC300 Engine Noise (falling revs)
Hi all,
Started up my bike today, warmed it up well, few runs around the yard and up and down the street, came back. Refuelled with freshly mixed 98RON and GRO at 50:1. Few more laps around the yard and I pulled up. Noticed a strange sound that happens both in gear and in neutral. Rev the engine up and let off and it sounds like something vibrates quickly for a while as the revs drop. Idles fine. Revs up, they drop and the sound happens. Only audible on the fall. Any idea what it could be? It sounds like its coming from the top end/expansion chamber. Powervalve maybe? Ping? |
#2
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I have the same - sounds more like something is loose and vibrating, not so much as an engine noise - also interested to know where it is because it drives me nuts!
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2003 txt250 Pro 2013 Ossa 280i |
#3
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Quote:
I just read this, and wonder if that could be it. I do notice a small area where some spooage is where the pipe and the engine meet. http://www.gasgasrider.org/forum/showthread.php?t=2058 I feel like I'm spending more time stressing and trying to get this bike right, than I am riding it. Sigh |
#4
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Is it okay to reuse the O-rings for the pipe if I take it off? Or do I need new ones?
Meant to be riding in a few days and would like to get this resolved before then. |
#5
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i will also check that.
I have removed my headder a few times to fit sump guards and pipe protection, and doubt you will need to replace the o-rings, they will only be a few months old, but if you do need to make sure you replace them with viton o-rings (for high heat use)
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2003 txt250 Pro 2013 Ossa 280i |
#6
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Thanks Matt.
The bike has all of 400km on the clock and is still under warranty. I haven't had the pipe off yet, but will do it tomorrow to see if I can re-seat it. The sound does sound like its coming from the head/pipe, and is at the revs when everything on the bike vibrates. (ie washers on the retaining pin for the footpegs, etc). I orginally thought the worst when a new sound popped up. Whats the easiest way to get the pipe off? Can it be done with the tank and seat on? Hope this solves both our problems. I'll post back with results tomorrow. Cheers, Jake |
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