levis Posted February 18, 2014 Report Share Posted February 18, 2014 Anyone knows what front and rear sprocket setting to choose for riding mountains single tracks compare to original one (11/42) ? My bike is a beta evo 300 4 strokes. Thanks Quote Link to comment Share on other sites More sharing options...
lineaway Posted February 19, 2014 Report Share Posted February 19, 2014 I would start with a 12t CS sprocket. Quote Link to comment Share on other sites More sharing options...
levis Posted February 19, 2014 Author Report Share Posted February 19, 2014 (edited) Puting 1 tooth on front sprocket is not too much compare to twicking the rear? Edited February 19, 2014 by levis Quote Link to comment Share on other sites More sharing options...
lineaway Posted February 19, 2014 Report Share Posted February 19, 2014 Changing the front to a 12 will still leave plenty of power in 1st gear. You should not have to change the chain and is quite cheaper and easier than the rear, Quote Link to comment Share on other sites More sharing options...
levis Posted February 19, 2014 Author Report Share Posted February 19, 2014 Ok thanks for your help lineaway. I'll give It a go for one more tooth on the front sproket. Quote Link to comment Share on other sites More sharing options...
levis Posted March 17, 2014 Author Report Share Posted March 17, 2014 (edited) Ok I've got some news. Instead I wanted to have more power since the mountain tracks are steep. So i've tried a 10 teeth front sprocket with 42 th rear and I felt a lot of fun riding at slow to middle speed but first and second gears were useless and the bike was too slow at full speed. So now, I would try a compromise. Putting one or two teeth on the rear sprocket (43 or44) keeping the 11 teeth on Front. Which one do you recommend? Thanks Edited March 17, 2014 by levis Quote Link to comment Share on other sites More sharing options...
axulsuv Posted March 17, 2014 Report Share Posted March 17, 2014 Sounds like just a 12 tooth CS would've put you where you want to be ... Quote Link to comment Share on other sites More sharing options...
tltel Posted March 17, 2014 Report Share Posted March 17, 2014 Ask for advice, then do the opposite TLTEL Quote Link to comment Share on other sites More sharing options...
levis Posted March 18, 2014 Author Report Share Posted March 18, 2014 (edited) Sounds like just a 12 tooth CS would've put you where you want to be ... If I'm not mistaken 12 teeth would put me to an even less throttle response which is something I'm not looking for when riding steep tracks. So I tried the opposit way with a 10 tooth CS but as I said above It's too much. My question was about the rear sprocket... Edited March 18, 2014 by levis Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 18, 2014 Report Share Posted March 18, 2014 You are still trying the wrong set-up. If 1st and second is worthless, then it is not steep. should have went with the 12. Quote Link to comment Share on other sites More sharing options...
tltel Posted March 18, 2014 Report Share Posted March 18, 2014 hi. First off I have never ridden a 300 4 stroke trials bike, but I am guessing it has plenty of torque and that 1st gear is pretty much useless on the tracks. Therefore if you raised the front sprocket by one tooth (assuming that it will actually fit in the space around the shaft)that should help to make 1st gear a bit more usable and should also give more top end speed if you need it, not sure what will happen to the other gears but they will all obviously be higher. Chain will probably be long enough so cost is minimal and its easy enough to change back, if you wanted to use the bike for what it was designed for. It seems to me that if you try 43/44 with the 11 front it will be similar to the 10/42 setup and I think you are going the wrong way. sometimes you can get lucky with the gearing changes but only you know what you want to achieve. Maybe its the motor that needs tweaking and not the gearing. Maybe you should swap it for KTM TLTEL Quote Link to comment Share on other sites More sharing options...
copemech Posted March 19, 2014 Report Share Posted March 19, 2014 Do the math lad, 10/42 gives you a 4.2-1 ratio. 11/44 gives you 4.0-1 ratio. What do you want? Quote Link to comment Share on other sites More sharing options...
levis Posted March 19, 2014 Author Report Share Posted March 19, 2014 (edited) What do I want? Ok I ride with a mate that have a 290 beta 2 strokes engine and of course his front wheel lift easily than mine. But mine was ok with the 10/42 but the transmission looked not tuned right and my speed was way too low compare to him. Now with the 11/42 my speed is ok but the front feels a bit too heavy when I try to lift it. For instance, now It's difficult to keep riding with the front wheel up. I point out that I'll won't go back to a 2 strokes engine for many reasons but that's an other story. Just trying to get the right spot. The 11/43 ratio might not be significant for responsiveness but still good for top speed but the 11/44 could be the best but I'm scare I'll have to buy a longer chain. Edited March 19, 2014 by levis Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 19, 2014 Report Share Posted March 19, 2014 Having power and trail gears are two different things. You need a pipe to wake up the motor! Maybe more! should have just said you wanted to blow by that lowly 2 stroke! Quote Link to comment Share on other sites More sharing options...
copemech Posted March 20, 2014 Report Share Posted March 20, 2014 Yes, the expensive Tergo and Beta exhausts will wake up the heavilily muffed bike. Otherwise, put you stock gears back on. Quote Link to comment Share on other sites More sharing options...
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