Initially I found my blaster to be a bit noisy, to me it sounded like i was hearing the reeds working at idle. Should I expect to be able to hear the reeds? Later after several hours of riding and tinkering (only time she ran truly loan is if I forgot to turn on the fuel) everything actually sounded pretty good.
The other day when I was trail riding I ended up winding it out really tight on a long straight thinking I was in 6th, wrong I still had another gear to go as I was in 5th. Thought I heard a little tick from the engine, at low rpm in neutral with no load. Watched my rpms for the next little while and it went away / maybe was my imagination.
Recently I pulled the flywheel cleaned everything up put on a new case gasket. Even though I used blue lock tight on the stator plate bolts as well as the flywheel nut. I have been listening carefully for any signs of loosening. And noticed two things one was a bit of vibration as the rpms spin down, after revving the motor in neutral, and a tap at idle that seemed like maybe one of the rod bearings, except it didn't really follow the motor when revved it seemed to go away. I immediately pulled the left case cover and checked the flywheel to find it was solid as a rock. I did notice when I moved the flywheel by hand there was a slight click after a couple mm when changing the direction I was turning it (i felt it had to be the main drive gear on the basket, moving to mesh with its mate.) If a bearing had that much slop it would have blown at 3k rpm or less.
I noticed that there is one sound while in neutral with the clutch engaged, but also another sound I can hear with my ear near the jug. I cannot tell if it is a reed sound or possibly the wrist pin.
Not asking anyone to give away their secrets, but what would I expect a wrist pin to sound like if it were that? (As maybe compared to a wrist pin sound of a 4cyl car),
Any way to narrow things down other than pulling the top end?
Also about a little bit of motor gear noise in neutral, does that indicate any particular problem or condition or is it likely a normal sound. Both sounds are faint and would not have been noticed unless I had really been listening
I haven't done Compression or leak tests but outward signs point to reasonable compression and no major leaks.
Plenty of power down low, and a steady afr whether barely warm or running for hours.
I run 32:1 Quicksilver (for premix or Injection) / 93 octane no ethanol pumpgas.
And don't really have anything special done to it. Jetted, piped, -airbox cover.
Eventually I will end up pulling the top end, and clutch cover. As I have been thru about everything else.
But right now I am primarily concerned with any reliability issues. I enjoy riding the bike, but it's really for my boys the oldest who is half afraid of it, and the younger 10 yr old who weighs 70 lbs soaking wet and isn't afraid of the bike as much as he is stalling it on a hill w/o rear brakes. Either of them could care less about a couple horse, but let It quit running.......
Maybe I am just being paranoid, I wish I had a good high quality microphone, I tried to record the sounds with my phone and tablet and couldn't hear anything even though I knew what I was listening for.
Thanks in advance for any help you can give.
DeeBee
The other day when I was trail riding I ended up winding it out really tight on a long straight thinking I was in 6th, wrong I still had another gear to go as I was in 5th. Thought I heard a little tick from the engine, at low rpm in neutral with no load. Watched my rpms for the next little while and it went away / maybe was my imagination.
Recently I pulled the flywheel cleaned everything up put on a new case gasket. Even though I used blue lock tight on the stator plate bolts as well as the flywheel nut. I have been listening carefully for any signs of loosening. And noticed two things one was a bit of vibration as the rpms spin down, after revving the motor in neutral, and a tap at idle that seemed like maybe one of the rod bearings, except it didn't really follow the motor when revved it seemed to go away. I immediately pulled the left case cover and checked the flywheel to find it was solid as a rock. I did notice when I moved the flywheel by hand there was a slight click after a couple mm when changing the direction I was turning it (i felt it had to be the main drive gear on the basket, moving to mesh with its mate.) If a bearing had that much slop it would have blown at 3k rpm or less.
I noticed that there is one sound while in neutral with the clutch engaged, but also another sound I can hear with my ear near the jug. I cannot tell if it is a reed sound or possibly the wrist pin.
Not asking anyone to give away their secrets, but what would I expect a wrist pin to sound like if it were that? (As maybe compared to a wrist pin sound of a 4cyl car),
Any way to narrow things down other than pulling the top end?
Also about a little bit of motor gear noise in neutral, does that indicate any particular problem or condition or is it likely a normal sound. Both sounds are faint and would not have been noticed unless I had really been listening
I haven't done Compression or leak tests but outward signs point to reasonable compression and no major leaks.
Plenty of power down low, and a steady afr whether barely warm or running for hours.
I run 32:1 Quicksilver (for premix or Injection) / 93 octane no ethanol pumpgas.
And don't really have anything special done to it. Jetted, piped, -airbox cover.
Eventually I will end up pulling the top end, and clutch cover. As I have been thru about everything else.
But right now I am primarily concerned with any reliability issues. I enjoy riding the bike, but it's really for my boys the oldest who is half afraid of it, and the younger 10 yr old who weighs 70 lbs soaking wet and isn't afraid of the bike as much as he is stalling it on a hill w/o rear brakes. Either of them could care less about a couple horse, but let It quit running.......
Maybe I am just being paranoid, I wish I had a good high quality microphone, I tried to record the sounds with my phone and tablet and couldn't hear anything even though I knew what I was listening for.
Thanks in advance for any help you can give.
DeeBee
