Hi new to the site .Recently bought a my2000 TDM 850 twin ,great big bike, it needs a new chain and sprockets .i have found it has an exceptionally long first gear which makes it very lurchy at junctions etc and requires feathering of the clutch constantly on removing the chain/sprockets have found it has 17 tooth (front) and 43 rear sprockets. can anyone tell me what the standard ratio should be? the previous owner has changed the ratio to bring the revs down at cruising speeds as he had a long commute.

Hi new to the site .Recently bought a my2000 TDM 850 twin ,great big bike, it needs a new chain and sprockets .i have found it has an exceptionally long first gear which makes it very lurchy at junctions etc and requires feathering of the clutch constantly on removing the chain/sprockets have found it has 17 tooth (front) and 43 rear sprockets. can anyone tell me what the standard ratio should be? the previous owner has changed the ratio to bring the revs down at cruising speeds as he had a long commute.

Its supposed to be 16/43.