08-18-2016, 09:33 PM
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#1 |
Join Date: Feb 2016
Location: SC, USA
Posts: 46
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Rev up engine, slow and stepped come down
Anyone else's RX3 do this? Mine always has. If I'm in neutral, and I give the engine a good rev, it'll rev up and then on the way back down it'll hold at maybe 3k rpm for a second or two, then drop back down to idle. Does anyone's actually come back down smoothly?
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'16 Red RX3, K270's, 13t Front, Fog lights, Tusk Bar Risers (4K mi.) '82 Suzuki SP250 (11k Miles) '85 Honda Rebel 250 (Sold April 2016) |
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08-19-2016, 12:02 AM
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#3 |
Join Date: Feb 2016
Location: George West, Texas
Posts: 4,097
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Software?
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***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
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08-19-2016, 12:23 AM
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#4 |
Join Date: Jul 2015
Location: Milpitas, CA. USA
Posts: 775
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Mine drops to idle fine.
Your symptom sound very similar to something I would see on the old Honda 350 & 450 twins when one or both intake valves were too tight and needed adjustment. Is your tire pressure okay? |
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08-19-2016, 11:43 AM
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#5 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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My guess is that when you rev it, you dump a bunch of fuel into the system...then on the way down, the EFI and O2 sensor are sniffing the excess HC's and CO's and stepping it down, controlled by their version of an AIC, to burn off the excess gasses instead of expelling them into the air.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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08-19-2016, 12:43 PM
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#6 |
Join Date: Sep 2014
Location: Arvada, CO
Posts: 1,004
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Mine does not do that either. It's not normal. I would give Gerry at CSC a call and ask him.
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Red 5 standing by! 2015 CSC red RX3 with 19" front wheel, Shinko 804/805, skid plate, tall seat, 13T/45T sprockets, progressive shock, Winyoochanok windshield, GENSSI LED headlight, SW-Motech tankbag, Shorai Lithium battery 2014 Ural Patrol |
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08-22-2016, 12:49 PM
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#8 |
Join Date: Mar 2009
Location: Sardis, BC, Canada
Posts: 25,977
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If it was carbed, I'd say it's a vacuum leak. It certainly could be, but it could also be a FI issue.
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Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer |
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