willid7864 Posted January 11, 2013 Report Share Posted January 11, 2013 (edited) hi what sprockets sizes are everyone runing on a 2009 250 evo, what is standard. im running 11 tooth front and 41tooth rear.bike does feel i like under geared on big climes,what is everyone else running how do i rise the back shock up,as when i stand on bike theres not much clearence between the wheel and mudguard thanks Edited January 12, 2013 by willid7864 Quote Link to comment Share on other sites More sharing options...
myzeneye Posted January 14, 2013 Report Share Posted January 14, 2013 http://www.splatshop.co.uk/sachs-rear-shock-springs-Gas Gas-pro-beta-evo.html This takes 15 mins to fit and any dope like me can do it. Also, http://www.splatshop.co.uk/paioli-front-fork-spring-0-9kg-mm.html £100 problem solved fatty.... hahahah. I've just done these mods as the 09 evo standard suspension set up us crap. Built for whippets weighing in at 10-12 stone........ Not a fine figure of a man and a half like me weighing in at 17.5 stone! How much do you weigh ? They do 10% or 20% stronger springs....... Quote Link to comment Share on other sites More sharing options...
nzralphy Posted January 15, 2013 Report Share Posted January 15, 2013 Yup, the 09 (and 10??) Evos came out with soft springs.... ok if you are 70kg....... but everyone else needs heavier springs Quote Link to comment Share on other sites More sharing options...
chuckindenver Posted January 23, 2013 Report Share Posted January 23, 2013 use standard 2012 springs and youll be happy, i run a 10 front 41 back, stock gearing makes second gear useless in a section. Quote Link to comment Share on other sites More sharing options...
liviob Posted January 28, 2013 Report Share Posted January 28, 2013 (edited) If your bike has the extra flywheel weight added to the ignition flywheel remove it and see if you have enough torque after its removal. I have a 01 rev 3 with 02 air box updates and I ride it at very high altitude. After a fresh top end rebuild it would not pull second gear up a gentle slope. I believe it has 11/42 chain wheels. To ride this bike at high altitude I had to remove .020 from the head, run the thinnest base gasket that beta recommends, add a v-vorce reed, the next hotter spark plug and remove the clutch side flywheel to get it to run strong enough for riding at 7'k-9'k. I have done the beta clutch mod and the clutch works very well but with the clutch side flywheel removed the low RPM power pulses come through while I am slipping the clutch while creeping through a section. I have considered reinstalling it. I also like how smooth and controllable the engine is while I am attempting a floater with the clutch side FWW installed. Edited February 3, 2013 by liviob Quote Link to comment Share on other sites More sharing options...
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