warddt125r Posted July 5, 2012 Share Posted July 5, 2012 HELP? Link to comment Share on other sites More sharing options...
warddt125r Posted July 5, 2012 Author Share Posted July 5, 2012 Hi recentley I have bought a 2003 dt125r witch had only ever been used for ploddering round a farm it has only done 700 miles. I have looked on a lot of websites and many people have asked this but still I can't find an answer to my problame. Basicly when I ride the bike it seems like anything over 7000 rpm the bike is rough it is quick off the mark but won't do over 57mph. I have another 1 of these bikes witch I use off road and have fully deristricted myself with no problames. When I bought this bike the other day I got it home removed the exhaust to find the restriction coan had been removed already I also moved my reed switch away from my speedo and wraped it in a bag I also adjusted the powervalve so it was setup exactly right. My bike still only goes 57mph and struggles from 50 it will only hit about 52 up hill max I currently have my mixture screw 1 and a half turns out and the needle in my carb is on the 4th setting down from the top with the point at the bottom, I am also running on a number 8 spark plug instead of the number 9, my main jet is a 240 and I don't no what my small one is. Any info will be usefull to me as I have run out of ideas. Some people have told me to cut the triangula block off the reed section but I didn't want to start cutting things without getting some other info, also could this be my cdi is restricted because I have another exactly the same but don't no weather its worth trying Thanks in advance Link to comment Share on other sites More sharing options...
NEV Posted July 5, 2012 Share Posted July 5, 2012 Do a search in workshop threads for de-restricting DT's, theres plenty of info in there what you need to do. Link to comment Share on other sites More sharing options...
warddt125r Posted July 5, 2012 Author Share Posted July 5, 2012 Ok mate ill have a look now thanks still if any 1 has had any other problame like this and it was caused by something other than a restrictor plz let me no Link to comment Share on other sites More sharing options...
warddt125r Posted July 5, 2012 Author Share Posted July 5, 2012 Ryt I cut the exhaust in half and took the restricter out then got it welded and put it back on the bike is now a lot quicker however it boggs at high revs seems like its not getting enough fuel I am thinking of up jetting and I am currently on the stock 240 jet what jet do u think I should go for? Or are there other things I can do? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted July 5, 2012 Moderator Share Posted July 5, 2012 did you check the PV..as NEV says it's all in the de restricting topic Link to comment Share on other sites More sharing options...
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