Post by mojo89 on Jul 24, 2013 11:28:23 GMT -5
-------The story:
While accelerating downhill, I reached about 40 mph. Something in the engine began rattling suddenly and slowed me down to 35 (while still going downhill). I was at 5500 km at the time. Since then, whether I'm on hills or flat ground, it doesn't rattle until I'm going at least 35, and the engine will not rev any higher once the rattling starts. Might be of note that 30 is the speed where it starts revving into higher rpms.
-------Bike's history:
I bought it brand new and rode it daily for 5 months, about 1000 km per month. Two or three times a week I ride 20 miles in 45 minutes at about 40 mph cruising speed (I know I shouldn't be giving it full throttle that long) plus daily around town riding in traffic.
I noticed the same rattling noise around 4500 km, it was softer and only started when I was going around 45 mph. I only went that fast down hills; for maybe 30 seconds at a time, I'd be revving pretty high and it would make that rattling/tapping noise. This was at full throttle.
All stock parts, regular maintenance performed religiously (oil changes, valve adjustments)
-----------What I've done so far:
Replaced the muffler, the mounting bracket was cracked, I thought it might have been rattling, but this did not fix it. Opened my cvt cover to inspect parts, nothing looked worn or out of place, but I didn't take off anything under the cvt cover except the overrunning clutch which was loose. I'm assuming it is held in place by the cover itself. During the subsequent ride after putting the cover back on, the rattling didn't start until 45 mph instead of 40, but still will not rev higher once the rattling starts. Hard to say where the sound is coming from, but if I had to guess sounds like it comes from the cvt case towards the front.
Any ideas?
While accelerating downhill, I reached about 40 mph. Something in the engine began rattling suddenly and slowed me down to 35 (while still going downhill). I was at 5500 km at the time. Since then, whether I'm on hills or flat ground, it doesn't rattle until I'm going at least 35, and the engine will not rev any higher once the rattling starts. Might be of note that 30 is the speed where it starts revving into higher rpms.
-------Bike's history:
I bought it brand new and rode it daily for 5 months, about 1000 km per month. Two or three times a week I ride 20 miles in 45 minutes at about 40 mph cruising speed (I know I shouldn't be giving it full throttle that long) plus daily around town riding in traffic.
I noticed the same rattling noise around 4500 km, it was softer and only started when I was going around 45 mph. I only went that fast down hills; for maybe 30 seconds at a time, I'd be revving pretty high and it would make that rattling/tapping noise. This was at full throttle.
All stock parts, regular maintenance performed religiously (oil changes, valve adjustments)
-----------What I've done so far:
Replaced the muffler, the mounting bracket was cracked, I thought it might have been rattling, but this did not fix it. Opened my cvt cover to inspect parts, nothing looked worn or out of place, but I didn't take off anything under the cvt cover except the overrunning clutch which was loose. I'm assuming it is held in place by the cover itself. During the subsequent ride after putting the cover back on, the rattling didn't start until 45 mph instead of 40, but still will not rev higher once the rattling starts. Hard to say where the sound is coming from, but if I had to guess sounds like it comes from the cvt case towards the front.
Any ideas?
..BAD TO THE BONE..