Joined: Jan 2010
Posts: 9,835
Likes: 1,816
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Any kind of unexpected slippage while honking out of the saddle can put you on the ground and take out your mates as well, so must be avoided.
As for the OP's freewheel having the chain skip past a gear while shifting to larger cogs, that is a sure-fire symptom of the skipped cog being installed backwards.
Except that I'm not certain that a Suntour 5-speed freewheel's 2nd-position (threaded) cog can be installed backwards, or can it?
It's also a common symptom of a flexible chain and/or wider-ratio freewheel combined with a too-large chain gap, which may or may not be adjustable on the OP's particular rear derailer.
Last edited by dddd; 03-22-18 at 12:52 AM.