Something just doesn't seem right. Perhaps I'm imagining things or overreacting, but I'd like your guys opinion... I keep hearing a rattling noise almost like pinging (sounds like a marble in a paint can), but it occurs at certain RPM's. Giving more or less throttle gets rid of it, and it doesn't matter if it's under load or not. Maybe it's just a loose bolt somewhere?
Sounds exactly like my issue, AgentX. I checked the timing about 5 times, and it's spot on. I might try advancing it anyway just to see what happens. Also, I'm running 100 octane. Just filled up with 91 to see if that makes a difference. Usually when I hear a ping think "is that pinging?", give a bit more throttle and it gets louder, then I think "yep, definitely pinging." This however, is just like you describe. Only certain RPM's, and uphill or straightaway makes it no worse or better. I looked around for things that might rattle, and even held my keys while riding to see if that was it. But it really seems to be coming from the engine.I made some adjustments to my idle screws and now it idle's fairly well and hasn't died or made scary noises like that ka-chunk, though I'm getting some backfires when engine braking so I think I'm a bit rich.
Ace....as in the main rod bearing?.. or other bushings all over?.. or crank bearings?... Ace.. think i read you mention something on ceramic bearing.. was that concerning the wheel bearings?.. or did you replace main crank with ceramic bearings?I been thinking alot on this lately... replacing everything with higher qual bearings.. all throughout... ceram if possible.. slight perf increase?
Backfiring on engine braking means your throttle is closed, and that puts the carb on the pilot circuit.So, that's what you have to adjust. Use your little angled screw.I can't tell you which way to turn it, because it can happen with too rich or too lean. Too lean is more common, but it can happen either way.
The sound your hearing "sounds" to me like a rod bearing to me. ERC
I just don't know where these people got the idea to beat these things with a hammer.
Agent x : I'm calling GSO and telling them u using your oven to cook your enfield case ... GM
"I have used only this block and hammer always to remove the bearings. My father before me used this block and hammer and his father before him used this block and hammer.Why change that which has been done so successfully for so many years?"
I just had the muffler off a week ago and it was fine. I'll check it again though.I've tweaked the timing both directions and it just makes it run poorly. I don't think it affected that knock.Fuel tank is nearly full.It doesn't knock like that unless under at least a little load so I can't really narrow down the exact spot. Perhaps I could enlist the help of a friend to hold the brake and give it a little throttle in gear...
I wonder if your points plate is hanging up your mechanical advance.
That's what I believe it sounds like, but I don't have much experience with these little thumpers. Try listening to it here: http://youtu.be/rXIzCynmCRM
Well, my noise and your noise sure aren't the same...Mine's much quieter and more rapid. Yours, alas, is slightly more alarming!
Well, it comes and goes sort of randomly.Have you checked your primary chain tension, or inspected all the stuff in your primary chaincase?
My stupid rattling noise ended up being a lose tank bolt. Metalic vibration noises at the top end of the gears right before shifting. DUMB ME. Spent a week trying to figure that crap out. Live and learn.
suit yourself but you're just asking for more scrap metal to cleanout of the oil channels and risking a lot more damage to the cylinder... old school thinking is knock on acceleration is crank bearings; knock on deceleration is rod bearing.... have you pulled either of the rocker covers or oil filterlooking for small bits of white metal?