October 5, 201411 yr Hi. i have bought a tatty 247 late model that i plan on restoring then using. Pics are on the way! Are there different swing arms for the 247. the one on mine doesnt be able to fit the large chain guard there are no mounting points for it near the shock mount and the swing arm doesnt seem to be long enough to cater for the chain guard. do twinshock bikes have to have a shark style chain guard on the underside of the rear sprocket to conform woth ACU rules? Also as a rough guide for beginner riding what tooth sprockets would people recommend. Cheers all.
October 5, 201411 yr There were seven different swingarms for the 247 along the years, but only two chainguards: the fiberglass one from 21M0001 to 21M4381, and the plastic one from 21M4382 till the end of its production.
October 5, 201411 yr My 1979 247c runs on 9 tooth front/40 tooth rear sprockets which gives good ability to cope with a general mix of sections and allows second gear to be used as a realistic option.
October 6, 201411 yr My MkI goes with the standard rear sprocket and a 9 teeth front one. 10 is unusable for serious trials. I know many pilots of those years and the first improvement they did was to change the 10 teeth for the 9 one.
October 6, 201411 yr I'm going to try a 10 - 44 combination - I think it should just be a little bit higher (quicker) than a 9-42....... I'll stand corrected if that's wrong Cheers The wobbler
October 12, 201411 yr Author just looking at new sprockets and was wondering why the spacing on the bolts were weird. turns out i have a 248 wheel and swing arm in there. then the brake pedal has been modified. grrrrr.
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