kenDAWG Posted September 30, 2012 Share Posted September 30, 2012 Hello people! Just bought a perfect example of a dr125r just got a minor problem with I believe the carb-ill explain in a little detail. Pulls from standstill up to 9000ish rpm and then I get bogging and stuttering, noticed it more today when I took her out on some busy roads. Only bought it Friday night Just wondering if anyone has any advice or suggestion? Bike is fully derestricted with a full dep exhaust and snorkel removed, previous owner says he got carb jetted up in a garage but I don't believe him. Any ideas what jet she should have in? Cheers Ken Link to comment Share on other sites More sharing options...
Moderator Airhead Posted September 30, 2012 Moderator Share Posted September 30, 2012 240 standard, 250 with the dep Link to comment Share on other sites More sharing options...
blackhat250 Posted September 30, 2012 Share Posted September 30, 2012 Check the Flow of fuel to carb, maybe choked petcock, [ filtre in tank etc,, Link to comment Share on other sites More sharing options...
dt502001 Posted September 30, 2012 Share Posted September 30, 2012 Move the needle clip in the carb down 1 notch = more fuel for top speed running. Airhead ru shure about the 240 stock seemes to me someone had a bad melt down with a 210 stock jet?? Link to comment Share on other sites More sharing options...
kenDAWG Posted October 1, 2012 Author Share Posted October 1, 2012 Am gonna order a couple of new plugs and pull apart carb see how she is setup me thinks Also checking filters as suggested! Cheers Ken Link to comment Share on other sites More sharing options...
AndyDtr08 Posted October 1, 2012 Share Posted October 1, 2012 They did increase the jet size as standard from 210 to 240 from 1997 onwards, starting with the fist 4BL model. They then changed it back in 2004/05 with the first DT125RE. Back to 210. I'm guessing that was because of how restrictive te exhaust was with all the CAT. If you've got a DEP on I'd start on a 250 and work down if you need to. Link to comment Share on other sites More sharing options...
kenDAWG Posted October 1, 2012 Author Share Posted October 1, 2012 honestly im not messing on with jets or anything like that! had enough of trying to setup carbs, if the spark plug cand filter changes dont make a difference ill be thinking about decoking exhaust then if no joy ill be putting it into a shop for them to set it up!! Link to comment Share on other sites More sharing options...
AndyDtr08 Posted October 2, 2012 Share Posted October 2, 2012 As long as the plug is sparking well, it's working. Changing it will be a waste of time/money if its working. You'll want to do a plug chop and see what the mixture is like. If it's running lean then you'll have a good chance of holeing the piston and ending up needing a full engine rebuild. If it's running rich then it will not be performing as well as it could and you may foul the plug. Link to comment Share on other sites More sharing options...
kenDAWG Posted October 2, 2012 Author Share Posted October 2, 2012 Just been quoted £15 for carb setup by a shop which specialise in mx 2t bikes so I'm happy about that! I do think the plug is being fouled so am just gonna bang it in the shop Link to comment Share on other sites More sharing options...
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