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View Full Version : Schwinn Johnny G Pro Spinner... really loud after new chain and front sprocket?!?!



harrymaneuvers
11-13-2011, 06:10 PM
Hello All!


I am new to the IC scene but I have been riding mountain bikes for a few years now. Me and my girlfriend have been spinning at our local gym and decided to start looking for our own bikes.


I found a used Johnny G pro spinner two weeks ago and it felt really solid... just had a little noise/vibration coming from the chain/drivetrain. Considering that I am pretty mechanically inclined (at least with cars) I figured it would be a great deal for the $125 that I spent.


So I brought it home and cleaned it up (wasnt very dirty). Then I decided that I was going to familiarize myself with the mechanics of the bike and freshen up the drivetrain at the same time.

So I bought a few things to get me started:

- Jeffs ultimate tech series manual volume 1
- New SRAM single speed chain
- New 14 tooth front sprocket
- New locking ring in case I damaged the original one
- New chain guard rubber boot/gasket (24")
- New chain guard rubber ring/gasket
- A can of tri-flo


After putting the new parts on, I have adjusted and re-adjusted and cant seem to get the driveline as quite and I feel it should be.

I can say that I am fairly certain it is not the axle or flywheel hub as I have held the flywheel by the axle with two hands and had my lady spin it... the bearings felt solid and not rough feeling or noises were observed.

Running the chain as tight as is recommended (two rotation points method) increases the noise and vibration from the chain considerably.

Here is a video:

http://i773.photobucket.com/albums/yy18/harrymaneuvers/th_VIDEO0051.jpg


I (http://s773.photobucket.com/albums/yy18/harrymaneuvers/?action=view&current=VIDEO0051.mp4) can essentailly tell that all of the noise is from the chain making contact with the front sprocket... the sprocket seems to be landing in the center of the chain...

All help (Especially from the man himself) would be greatly appreciated.

Thanks in advance!

zoepup
11-14-2011, 07:57 AM
Harry, welcome to the board. Hopefully Jeff can chime in on this one. I have had this with numerous bikes as well. You seem to have tried most of what I would have recommended.

harrymaneuvers
11-14-2011, 09:16 AM
Thanks Zoepup! The good news is that I got this bike at a good enough deal that even if I have to replace a few more parts, I still come out with a screamin deal.


I have watched every single video on Studiocycles/youtube and have noticed that when Jeff is explaining setting up a Johnny G, the limited edition Johnny G that he is riding seems to make a good amount of noise but it is hard to tell if it is on the same level as my bike.


http://www.youtube.com/watch?v=ExLdzSsc1Jo


(http://www.youtube.com/watch?v=ExLdzSsc1Jo)

harrymaneuvers
11-15-2011, 03:48 PM
Bump for any help or suggestions.