YAMAHA21 Posted December 18, 2015 Share Posted December 18, 2015 At the moment my bike has a full dep system and has been derestricted (speedo method). I'm going to buy some boyesen dual stage reeds and replace the standard air box snorkel to the one that came with the dt230, as it is slightly larger. My question is, for the upgrades I have just listed, what size jet do you think would be appropriate to upjet to? I have seen posts of people running similar upgrades running a 230 main jet and some running a 250 main jet. My powervalve is not pinned open. Also, is there any other mods that are worth doing while I do these things, I have seen some things about people modifying the rubber bit on the intake manifold. Cheers So the upgrades are: Full DEP system Derestricted (speedo) Boyesen dual stage reeds dt230 airbox snorkel Link to comment Share on other sites More sharing options...
YAMAHA21 Posted December 21, 2015 Author Share Posted December 21, 2015 Anybody??? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted December 21, 2015 Moderator Share Posted December 21, 2015 wont be far wrong with a 240 I would think Link to comment Share on other sites More sharing options...
blackhat250 Posted December 21, 2015 Share Posted December 21, 2015 Its suck it and see with 2T"s. your ports havna been opened , this gives the biggest performance boost, , short run ,and plug chop . will tell the story , RACE 2 strokes try to get as lean as possible. but thers risks in this, . Link to comment Share on other sites More sharing options...
YAMAHA21 Posted December 22, 2015 Author Share Posted December 22, 2015 1 hour ago, Airhead said: wont be far wrong with a 240 I would think I'll get a 240 and a 250 as they're only 5 quid each... Link to comment Share on other sites More sharing options...
nigel smith Posted January 19, 2016 Share Posted January 19, 2016 Hi how did you get on with your mods? the rubber bit in the manifold you mentioned helps the airflow and from what I have read has a detrimental effect if removed. nige Link to comment Share on other sites More sharing options...
YAMAHA21 Posted January 24, 2016 Author Share Posted January 24, 2016 I've got the jets and the reeds are one their way but I'm thinking about skipping the dt230 snorkel and just remove the stock one instead. I've heard some bad things about doing this though so I'm not sure atm. I'll start a new thread and see what people think. Link to comment Share on other sites More sharing options...
Recommended Posts