stephen1967 Posted November 10, 2012 Report Share Posted November 10, 2012 I have a 2011 Evo 250 and it seems to lack bottom end grunt, would fitting Boyesen reeds to it make any difference, what are people`s views on them ?. Also there are a few different type of reeds, which are the best ones to go for to improve my bike ?. Many thanks, Quote Link to comment Share on other sites More sharing options...
lee_28 Posted November 10, 2012 Report Share Posted November 10, 2012 Hi Stephen, I recently put a set of carbon tech race reeds in my 300 and it made a noticeable difference to both bottom end and top! Also have u still got the weight on the flywheel? Quote Link to comment Share on other sites More sharing options...
stephen1967 Posted November 10, 2012 Author Report Share Posted November 10, 2012 Hi Stephen, I recently put a set of carbon tech race reeds in my 300 and it made a noticeable difference to both bottom end and top! Also have u still got the weight on the flywheel? I still have the flywheel .weight fitted, Quote Link to comment Share on other sites More sharing options...
lee_28 Posted November 10, 2012 Report Share Posted November 10, 2012 Could be worth trying it with out the weight? Ull be surprised the difference it makes! Quote Link to comment Share on other sites More sharing options...
steve_earle Posted November 10, 2012 Report Share Posted November 10, 2012 I used boysen carbon on the rev 3 250 and they did make it pick up quicker. If you want more go off the bottom junk the flywheel weight, Get an x-block fast throttle tube. Changing the base gasket to a thinner one (0.3mm) will raise the compression and slightly alter the port timing giving better bottom end. Advance the ignition timing slightly. I did this on my 250 rev 3 and it was a different bike, I also changed main jet from a 150 to a 145 and pilot from a 30 to 27.5. That was running Mikuni carb and you probably have a keihin on the evo so seek advice on jetting the keihin if it needs it. All cost about 70 quid but what a difference, Really lively and snappy off the bottom and still revs clean. Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted November 11, 2012 Report Share Posted November 11, 2012 More response at the bottom flywheel weight off. Try this first then the Boyesens, but take care you have exactly the right tool to remove screws they can be made of butter (well loctited very tight!) Quote Link to comment Share on other sites More sharing options...
steve fracy Posted November 11, 2012 Report Share Posted November 11, 2012 The Boyesen carbon tech reeds are very good! Reasonably priced and make a big diffference. Use an battery powered impact driver with the correct driver bit and will come off no problem. Quote Link to comment Share on other sites More sharing options...
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