Lassesand Posted October 17, 2011 Share #1 Posted October 17, 2011 I noticed that the rubber hoses that connects the YICS to the engine are quite soft! They really flexes a lot on idle. Is it a good idea to replace then with stiffer new hoses? Link to comment Share on other sites More sharing options...
bkuhr Posted October 17, 2011 Share #2 Posted October 17, 2011 Best option is to remove them completely and plug the intake port nipples with sturdy plugs/clamps. YICS is not really needed. Link to comment Share on other sites More sharing options...
Marcarl Posted October 17, 2011 Share #3 Posted October 17, 2011 Best option is to remove them completely and plug the intake port nipples with sturdy plugs/clamps. YICS is not really needed. YEP!! Link to comment Share on other sites More sharing options...
Lassesand Posted November 2, 2011 Author Share #4 Posted November 2, 2011 I pulled the carbs and adjusted the fuel levels today. Two of the carbs had 18 mm below center (specs 14) so I fixed that. While the carbs where off I replaced the old soft YICS hoses with new and steel braided ones. Looks nice and I think I regained a couple of ponies! It feels stronger but I can't tell if it's just placebo... At least it runs more stable and smooth now. The low fuel levels probably caused a sort of pulsating feeling as someone pulled very slightly on and off the throttle. Seems to be gone now! I have clocked around 9000 km now with the Ignitech TCI and it works Tip Top! I want to connect a vacuum sensor and the fiddle with the ignition curve again. Ok, see you later! Link to comment Share on other sites More sharing options...
bkuhr Posted November 2, 2011 Share #5 Posted November 2, 2011 I pulled the carbs and adjusted the fuel levels today. Two of the carbs had 18 mm below center (specs 14) so I fixed that. While the carbs where off I replaced the old soft YICS hoses with new and steel braided ones. Looks nice and I think I regained a couple of ponies! It feels stronger but I can't tell if it's just placebo... At least it runs more stable and smooth now. The low fuel levels probably caused a sort of pulsating feeling as someone pulled very slightly on and off the throttle. Seems to be gone now! I have clocked around 9000 km now with the Ignitech TCI and it works Tip Top! I want to connect a vacuum sensor and the fiddle with the ignition curve again. Ok, see you later! FWIW The worst problem with the YICS was the plastic box itself, not the hoses. It would crack in the seams and allow vacum leak to either air or another chamber. If you can put a vac gauge and pump on each port of the box seperately, and each port will hold 10-15in with out dropping, then will will be ok for now. If you ever to suspect vacum problems, then suspect the YICS box. Link to comment Share on other sites More sharing options...
Lassesand Posted November 2, 2011 Author Share #6 Posted November 2, 2011 (edited) OK. I had a leaking YICS canister on my XZ550 but it was an easy fix. Cut it open and sealed it. Edited November 3, 2011 by Lassesand Link to comment Share on other sites More sharing options...
dingy Posted November 2, 2011 Share #7 Posted November 2, 2011 Steel braided YCIS hoses ?? OMG !!! ROFLMAO Gary Link to comment Share on other sites More sharing options...
Lassesand Posted November 3, 2011 Author Share #8 Posted November 3, 2011 TBQH I didn't suspect that steel braided YICS hoses should ad any significant amount of power to the engine. The reason for using steel braided was that the dimension was appropriate. The other hoses I had was way too thick and bulky. And it adds a bit of bling-bling to the murky area under the carbs; ha ha! TGIAF Link to comment Share on other sites More sharing options...
Trader Posted November 3, 2011 Share #9 Posted November 3, 2011 SO far on this thread I've seen TBX, FWIW, OMG, TBQH ,TGIAF, ROFLMAO and of course TCI and YICS Its bad enough trying to learn the mechanics of the bike without learning a new language too! You guys using your cell phones to post? Link to comment Share on other sites More sharing options...
Prairiehammer Posted November 3, 2011 Share #10 Posted November 3, 2011 SO far on this thread I've seen TBX, FWIW, OMG, TBQH ,TGIAF, ROFLMAO and of course TCI and YICS Its bad enough trying to learn the mechanics of the bike without learning a new language too! You guys using your cell phones to post? Keep reading, Trader...you might be learning Swedish! Link to comment Share on other sites More sharing options...
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