kenDAWG Posted October 2, 2012 Share Posted October 2, 2012 Hey people! Before I get my carb setup I'm thinking about making my dr125r more suitable at 60mph! If I scream the nipples off it it reaches 110kph but I'm not a fan of running bike flat out for national speed limit! If I go down a tooth on front sprocket would this allow more comfortable riding? I'm gonna keep the standard sprocket for green laining! Cheers Ken Link to comment Share on other sites More sharing options...
dt502001 Posted October 2, 2012 Share Posted October 2, 2012 No you want to go up a tooth on the front to lower the revs at 60mph. Link to comment Share on other sites More sharing options...
kenDAWG Posted October 2, 2012 Author Share Posted October 2, 2012 Good job I asked eh? Lol Is it correct that 1 tooth on the front is equivelant to 3 on rear? Link to comment Share on other sites More sharing options...
dt502001 Posted October 2, 2012 Share Posted October 2, 2012 Roughley.I posted this some where else but here goes again. Lets say your running a 40 t rear and a 13f your final ratio would be3.07 so in words that means the front turns 3.07 x to turn the wheel 1 x A 13- 37 would be 2.84 where a 14-40 would be 2.85. Link to comment Share on other sites More sharing options...
Moderator YamaHead Posted October 2, 2012 Moderator Share Posted October 2, 2012 Adding a tooth up front will definitely yield a better mpg figure & smooth out the ride a bit @ 60mph Link to comment Share on other sites More sharing options...
nayruf Posted October 3, 2012 Share Posted October 3, 2012 I have gone up 1 tooth on the front on my DT twin shock , my bike has only 5 gears, I did it to try to achieve a top gear cruise speed of 55 mph at slightly lower revs, Which it does, the difference is not that great though, the only draw back is that to get the most out of 5th gear I now have to hold onto 4th gear for a few revs longer, (What you gain on the swings you loose on the roundabouts) Iinternet search for motorcycle gear ratio calculator, () Link to comment Share on other sites More sharing options...
kenDAWG Posted October 3, 2012 Author Share Posted October 3, 2012 Well bike is in need of a new front sprocket so I might order standard and 1 tooth more, keep the standard one for green laining! How come the dt's struggle to get 60mph I would have thought the liquid cooled 2t engine would push for 80mph? Link to comment Share on other sites More sharing options...
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