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TOPIC: Best size main jet with dynojet? Forum Tools Post New Topic Show latest posts Rules

#883294 LuckyDon (User) Platinum Boarder Posts: 2127 Best size main jet with dynojet? 2 Years, 9 Months ago   Bike is at sea level in California. I have the Dynojet kit installed in my 06 roadster engine. I used all of Dynojets recommendations. Dynojet pilot jet. Mixture screw at 2.5 turns out. Runs good. Started at 3 turns out( Dynojet recommendation). Slide Needle groove #4. K&N 066 filter and cobra baloney cut exhausts. The instructions said to start with a 200 main jet with aftermarket exhausts. Which I am using. It says to use the #195 main jet with stock exhausts. It is running fine, but it could be too rich. When I give it throttle I can see black soot come from the exhaust for a second. Now it starts perfect on choke. Warms up fast. Idles fine. No popping on decell in the shop, and no popping on decel on the road test. Any suggestions?   Logged     Last Edit: 2015/05/05 09:04 By LuckyDon.   The administrator has disabled public write access. #883296 jd750ace (User) Front toward enemy Platinum Boarder Posts: 18763 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   The 172.5 Mikuni seems to be the hot main for a setup like yours. That would be right around a 184 in a Dynojet main. I'd drop the 184 in and leave the rest as it is (IF you want to stay with all DJ) . Sounds like you're real close except for the main is pretty large for the skinnier taper of the aftermarket needle. I have the DJ needle with Mikuni jets in mine Here's the sizing chart: http://www.jetsrus.com/FAQs/FAQ_mikuni_vs_dynojet_vs_keihin_sizes.htm   Logged     Last Edit: 2015/05/03 21:32 By jd750ace.     The administrator has disabled public write access. #883297 davej (User) Platinum Boarder Posts: 18167 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   My suggestion would be to go get a Mikuni 172.5 they are easier to find locally than a dynojet brand. A dynojet would be a 184 but like I said that is an equivelent to the 172.5 so why play around ordering one. Just go to a local shop and get the Mikuni.   Logged     dave   The administrator has disabled public write access. #883301 LuckyDon (User) Platinum Boarder Posts: 2127 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   Thanks for the reply. I was given several more main jets with the Dynojet kit. I will see what size the are. Thanks!   Logged     The administrator has disabled public write access. #883312 Curt (Moderator) Never to old to ride! Moderator Posts: 22378 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   DJ 185 is as close to a Mikuni 172.5 as you can get try that if you have one. The Chart for Mikuni VS DJ are in the tech articles.   Logged       The administrator has disabled public write access. #883682 LuckyDon (User) Platinum Boarder Posts: 2127 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   Thanks for all of the information. It is valuable and appreciated. I will report back the outcome. Thanks.   Logged     The administrator has disabled public write access. #884077 dirtbag (User) Fresh Boarder Posts: 25 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   I to have a 06 and started with the 200 dj then dropped to 190 dj and just ordered a 185 to put in.will be here by 5/13 and then i will repost.The black smoke went away at 190 but pipes still get black after couple days   Logged     The administrator has disabled public write access. #884098 RRSRoadstar1700 (User) Junior Boarder Posts: 166 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   I have a 1700, K&N with modified stock air filter housing, ported intake and Vance & Hines Big Shots. I bought the DJ kit and started @ the 200 and progressively worked down to the 185, #37 pilot get, DJ needle jet with clip at 3.5 groove and mixture screw ~2 turns out. Pipe baffles still have quit a bit of black soot, but bike runs really well. I'm still playing around with baffle design, so I won't try to fine tune it until I get the back pressure where it's going to stay.   Logged     Last Edit: 2015/05/06 20:08 By RRSRoadstar1700.     The administrator has disabled public write access. #884150 LuckyDon (User) Platinum Boarder Posts: 2127 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   Needle clip at 3.5????? How do you do that?   Logged     The administrator has disabled public write access. #884177 RRSRoadstar1700 (User) Junior Boarder Posts: 166 Re:Best size main jet with dynojet? 2 Years, 9 Months ago   Extra washer between grooves.   Logged       The administrator has disabled public write access.

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