Cowchip500
Account Removed
Yesterday was the first day this year that we broke 70deg. Of course, I'm riding to/from work. On the way home I start to hear a swishing noise, which I figure is my speedo (which hasn't worked in a year). But after a few min, it gets louder and I can't tell where it's coming from. I think it might be in the primary. THEN, out of now where (I'm doing 45 MPH, flat, straight), it backfires through the carb AND exhaust and runs fine after that for a minute. Then, it does it again a couple times and the swishing noise is getting louder.
I pull over and listen for any knocking noise, there's none. But is sounds like an out-of-round brake drum on a truck and once and a while there's a rattle, like something is loose and rolling around inside.
Of course, I'm in the middle of nowhere, with no cell bars. So I keep going. There's a hill I have to go down, so I pull the clutch and coast. The idle increases & decreases erratically a little.
The noise stays the same if I'm on the throttle or de-accelerating, so I don't think it rod or crank. The back-firing tells me it's possibly the stator but when I pulled it apart, I didn't see anything that looked loose, scored or out of place.
I have no idea what else it could be, other than maybe a rocker arm (maybe). I hate to take the whole engine down to find it. Does anyone have any idea what it might be?
Rob
I pull over and listen for any knocking noise, there's none. But is sounds like an out-of-round brake drum on a truck and once and a while there's a rattle, like something is loose and rolling around inside.
Of course, I'm in the middle of nowhere, with no cell bars. So I keep going. There's a hill I have to go down, so I pull the clutch and coast. The idle increases & decreases erratically a little.
The noise stays the same if I'm on the throttle or de-accelerating, so I don't think it rod or crank. The back-firing tells me it's possibly the stator but when I pulled it apart, I didn't see anything that looked loose, scored or out of place.
I have no idea what else it could be, other than maybe a rocker arm (maybe). I hate to take the whole engine down to find it. Does anyone have any idea what it might be?
Rob