March 9, 200521 yr Hi.just bought an new front and back sprocket for a 98 beta .....my old back sprocket had 43 teeth compared to 42 as stock. Question is there really much difference with 42 compared to 43. At the moment with 43 teeth I find that second gear is a bit to high for me, because i always seem to stall it . In 1st gear I seem to be revving very high.....I could just wait till I ride on sunday but...I wanna know now regards N
March 10, 200521 yr Dr. Nick, With a 42 you will be going 2.381% faster at the same RPM than with a 43. You might want to go to a 44 or 45 tooth if you like to ride in second. Cheers Doug Wilson
March 10, 200521 yr Author dfwilson...thanks for the reply but.... How did you get to that figure ???? is there an easy ay to work it out regards N
March 10, 200521 yr Dr. Nick, (# teeth on front sprocket / # teeth on rear) / (# teeth new front / # teeth on new rear)=change in ratio. X 100 is % change Cheers Doug Wilson
March 15, 200521 yr I've just made a simple Excel spreadsheet using those formulas. I found that keeping the rear sprocket standard at 41 teeth but changing the front from the standard 11 tooth to the 13 tooth will make the bike 15.38% faster using the same RPM's in each gear!
March 16, 200521 yr Author No I didnt Steveo. Bit of a catastophe on arrival in the states . I was arriving on the Saturday afternoon and there was a trial on the Sunday.....After being delayed a few hours ...problems with the room we were booked into ....problems with my credit card ....Blah Blah Blah .I didnt get to go see anything. I think my wife is a jinx.....When I try and organise a little excursion for myself it never seems to come off Kinell:-.....Is a 41 tooth Standard on the Rev 3`s back sprocket then, compared to a 42 on a Techno ???? Regards N
March 17, 200521 yr Dr Nick... My 2002 Rev3 250 has a 42 tooth rear sprocket..and that was the original one
March 17, 200521 yr 1 tooth on the counter shaft sprocket is equal to about 3 teeth on the rear. Up or down.
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