January 11, 201610 yr Any suggestions of best sprocket combination ? 10/11 & 42 seems to be the most common. Thanks Ross
January 11, 201610 yr Hi Ross, The info I have is that the standard front sprocket was an 11 tooth and that's what I have fitted with a 42 rear. The 10 was an option. Edited January 11, 201610 yr by racehunter
January 11, 201610 yr I've got a climber bottom end in a SWM with 10-41, and that is fast. Have just ordered a 44 rear.
January 12, 201610 yr Author 10 / 42 is getting there, but 1st feels like a low 2nd. Need to try it properly, would going from 42 to 44 make a noticeable difference ?
January 13, 201610 yr Author I hope so, three teeth normally makes a big difference on 520 chain. Thanks, can you post your thoughts when you have tested them.
February 22, 201610 yr Hi Ross, 44t was a disaster. Any slight amount of throttle and the front wheel was in the air. I can post it to you if you want to try it? it was good to meet you at Martins stand on Saturday. Cheers, Paul
February 22, 201610 yr Author Hi Ross, 44t was a disaster. Any slight amount of throttle and the front wheel was in the air. I can post it to you if you want to try it? it was good to meet you at Martins stand on Saturday. Cheers, Paul Hi Paul, sorry, a bit dim and didn't work out it was you ! I have had a shot on one in Spain and the gearing was "normal" with a 38 on the back. I will have to try and find out the gearing on the crank / clutch basket is where the difference lies. The water pump was driven from this so this might have necessitated the change ? Cheers Ross
April 23, 201610 yr 10 / 42 is getting there, but 1st feels like a low 2nd. Need to try it properly, would going from 42 to 44 make a noticeable difference ? ~5%.
April 23, 201610 yr Author ~5%. Since discovered climber crankshaft pinion has four more teeth than swm/txr air cooled bottom end. Next job is to swap earlier pinion. The clutch basket will also need swapped as earlier bikes helical cut, climber straight cut.
April 26, 201610 yr Since discovered climber crankshaft pinion has four more teeth than swm/txr air cooled bottom end. Next job is to swap earlier pinion. The clutch basket will also need swapped as earlier bikes helical cut, climber straight cut. Hi Ross, please consider why aprilia reduced the ratio transmission on engine pinion/clutch basket....because they reduced the clutch springs load!!!! regards.
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