Trials Australia Forums

My 75 247T Cota has a 9/48 sprocket ratio. The Cota ( not Cota T) manual states that a 10/40 is standard.
This would be geared significantly higher than present, however I feel that even with the current combination my bike is still geared a little too high for competition use.

On a UK forum I read of a bloke with a 9/56 combination. Is this a little extreme or a common comb? What sizes are readily available, if any, locally or do I need to buy from the US or UK. Were the 247T's equipped with the same internal G/Box ratios as the more common 247 Cota's? And what about Mary Lou?

Or finally am I just a big skirt who should stop whinging and learn to ride the bike as is?

Thanks in advance Fella's

Sprocket blanks are available up to huge sizes in Australia so getting a rear sprocket as big as you like should not be a problem. Ask at your local motorcycle shop. A likely wholesaler for sprocket blanks is John Titman Wholesale - located in Brisbane.
Alternatively you could buy a TALON sprocket. Have a look at their website and you should be able to find what sizes are available for your 247 off the shelf.
As far as gearing goes, yes you will find that it becomes less important as riding skill increases.
Another thing that affects how low geared a rider wants a bike, is how well it runs at very low RPM. If it runs a bit dodgy, lowering the gearing will reduce the feeling that the bike is on the edge of stalling. The flip side is that super low gearing like you are talking about makes it hard to ride large obstacles due to the bike speed being so limited.