heavywrecker Posted December 7, 2010 Report Share Posted December 7, 2010 I'm currently building a 3TA for beginners trials, green lanes and LDT's I have fitted a 14t front sprocket and am looking for advice/ suppliers of a larger than standard rear sprocket. (Standard Primary drive ratio fitted) I need the bolt up brake drum too. I'm thinking around 54 to 60 rear teeth, am I on the right track here? Also, do we think I will need to fit rim locks to stop the rear tyre slipping (or is the 350 so 'soft' it won't slip at 4 psi ) ? Cheers Quote Link to comment Share on other sites More sharing options...
beno41 Posted December 8, 2010 Report Share Posted December 8, 2010 I'm currently building a 3TA for beginners trials, green lanes and LDT's I have fitted a 14t front sprocket and am looking for advice/ suppliers of a larger than standard rear sprocket. (Standard Primary drive ratio fitted) I need the bolt up brake drum too. I'm thinking around 54 to 60 rear teeth, am I on the right track here? Also, do we think I will need to fit rim locks to stop the rear tyre slipping (or is the 350 so 'soft' it won't slip at 4 psi ) ? Cheers I have a 3ta trials bike and fit a 16 tooth engine sprocket from D&C Classics 01535 630137 14tooth gearbox and 54 rear and use standard 520 size rear chain. TALON will supply a rear sprocket machined to your dimensions. I fit two rim locks. Hope this helps. Quote Link to comment Share on other sites More sharing options...
heavywrecker Posted December 8, 2010 Author Report Share Posted December 8, 2010 I have a 3ta trials bike and fit a 16 tooth engine sprocket from D&C Classics 01535 630137 14tooth gearbox and 54 rear and use standard 520 size rear chain. TALON will supply a rear sprocket machined to your dimensions. I fit two rim locks. Hope this helps. Thanks mate, guess I'll have to bite the bullet and change the primary then. Cheers Quote Link to comment Share on other sites More sharing options...
cvgmmartin Posted December 10, 2010 Report Share Posted December 10, 2010 I ride a 500 triumph in trials and use the normal 18 tooth on the engine and have made a 12 tooth sprocket for the gearbox by welding on a sprocket onto an old sprocket that had the teeth machined off. The rear wheel sproket from talon is 54 teeth giving basically the same end result as beno41. Even so top gear is a bit low for green laning so I certainly wouldn't go to a 60 tooth rear. Quote Link to comment Share on other sites More sharing options...
heavywrecker Posted December 15, 2010 Author Report Share Posted December 15, 2010 That's cool, I really wasn't looking forward to changing the primary. Thanks Quote Link to comment Share on other sites More sharing options...
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