All,
I got one of those 80cc kits at the weekend (great deal and shipping inner EU from Germany if anybody interested). Paid €104 total and was at my door in 4 days....
Anyway, after some faff - not much - it fires up great and I can ride around the road. Main issues on start up were really clutch and chain guide alignment.
But there is a damn awful whine, screech, scrape from the main gears. The engine sounds sweet but this whine is really loud - if it wasn't there the bike would be really nice and quiet. I've searched around but not found any real clues.
I've had the crank cover and clutch plate off. There is no grinding on the cover. The noise is there with the cover off too. If I pull in the clutch then the drive sprocket is disengaged. With the engine running I can then move the main shaft position within the large ring gear by rotating the back wheel. I can see some eccentricity there and when it gets to a certain point the whining starts. A little further and it stops again. When I engage the clutch and drive the whine is there all the time but I guess it oscillates as the gear rotates. The gear teeth do not foul the casing though.
I'd really like to get rid of this - any tips appreciated! I guess I can try to pull off the drive gear and look but it would be great to know what to look for and if this is a standard complaint and if something needs to be shimmed out or if I can just run it and it will go away? Prefer not to do the latter as it is attention drawing!
Any tips / hints appreciated.
Cheers
Stephen
I got one of those 80cc kits at the weekend (great deal and shipping inner EU from Germany if anybody interested). Paid €104 total and was at my door in 4 days....
Anyway, after some faff - not much - it fires up great and I can ride around the road. Main issues on start up were really clutch and chain guide alignment.
But there is a damn awful whine, screech, scrape from the main gears. The engine sounds sweet but this whine is really loud - if it wasn't there the bike would be really nice and quiet. I've searched around but not found any real clues.
I've had the crank cover and clutch plate off. There is no grinding on the cover. The noise is there with the cover off too. If I pull in the clutch then the drive sprocket is disengaged. With the engine running I can then move the main shaft position within the large ring gear by rotating the back wheel. I can see some eccentricity there and when it gets to a certain point the whining starts. A little further and it stops again. When I engage the clutch and drive the whine is there all the time but I guess it oscillates as the gear rotates. The gear teeth do not foul the casing though.
I'd really like to get rid of this - any tips appreciated! I guess I can try to pull off the drive gear and look but it would be great to know what to look for and if this is a standard complaint and if something needs to be shimmed out or if I can just run it and it will go away? Prefer not to do the latter as it is attention drawing!
Any tips / hints appreciated.
Cheers
Stephen