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Go Back   FZ1OA Message Board > FZ1 & Fazer Owners Association > Exhausts, Carburetion & Performance > Gen 2 Exhausts, Fueling & Performance

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Old 06-23-2017, 01:28 PM   #21
okrider
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I am at this same point where I'm trying to decide if I want to cut the airbox or not. What I want to know is if this mod has any affect on the throttle response.
I already have the vcyclenut flash for slip on and while it is good above 5k rpm for throttle snatch, I have a distinct lag between when I open the throttle and when the bike actually starts going under 5k rpm. It also backfires a little before it gets going. My tps is set at 18, bmc air filter, yoshi slip on, ais blocked, throttle bodies are perfectly in sync. 2008 with 18k miles.
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'08 Red (Pepper)
Perf: Yoshi TRC CF slip-on, VCyclenut, AIS, BMC, Graves VStacks, Lars, R1 shock(Satan V4), R1 forks, R1 brakes(master/calipers), Galfer steel lines
Other: BMS seat, custom highway pegs, ZG touring windshield, T-Rex, Throttlemeister, Yoshi fender elim w/ BMW signals
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Old 06-23-2017, 02:46 PM   #22
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I'd say cut the airbox regardless of flash or fueling, the OEM intake is atrociously small, and the intake sound is wunderbar- even more so with velocity stacks.

If you havent gone with an aftermarket filter yet, it wont have the same affect on A/F anyways, just sound better and be ready for whenever you do upgrade for performance.


As far as selling goes? HAHAHAHAHA. Nobody is going to look under your tank before buying, much less complain about a better sounding and performing machine. Airboxes are cheap plastic $50-60 free shipping all over ebay. Cut it. Ride it. Love it.
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RIP "Envy" - 11/14/15. Envy 2 - '08 Graphite : Full Fairing * AK20s * Elka Elite* Yosh R77 * Flashed * LARS * BMC * Vortex 49T * R6 Thrttle * GPR V4 * PCV+Ign+Autotune * TechSpecs * Carbon all over * CL XBK5 * DblBubble * Full Givi/Kappas * ASV C5 * Nautilus 140dB * HIDs 6k * Corbin CF x 2 * Thrttlemstr Cruise * Garmin Nuvi * Gold Rad Guard* Block Offs * Spdhlr * 780 grips * Givi Slim Fender * Clear Alt TL
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Old 06-23-2017, 02:47 PM   #23
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If you do you might need to have your ecu redone. Since I know he adjusts for the air box mod. You might as well do it, free hp
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Old 06-23-2017, 02:50 PM   #24
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Quote:
Originally Posted by okrider View Post
I am at this same point where I'm trying to decide if I want to cut the airbox or not. What I want to know is if this mod has any affect on the throttle response.
I already have the vcyclenut flash for slip on and while it is good above 5k rpm for throttle snatch, I have a distinct lag between when I open the throttle and when the bike actually starts going under 5k rpm. It also backfires a little before it gets going. My tps is set at 18, bmc air filter, yoshi slip on, ais blocked, throttle bodies are perfectly in sync. 2008 with 18k miles.
Dude! its the low RPM bro. The FZ will never "jump/grunt" forward like a bike that makes torque down low.

The bigger intake may help some, but you gotta realize throttle response below 4.5-5k is NEVER going to feel like throttle response at 7,8,9+

PS- have you unplugged your O2 sensor? Ya know the FZ tries to tune itself at certain throttle positions and rpm (all below 7k IIRC).
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RIP "Envy" - 11/14/15. Envy 2 - '08 Graphite : Full Fairing * AK20s * Elka Elite* Yosh R77 * Flashed * LARS * BMC * Vortex 49T * R6 Thrttle * GPR V4 * PCV+Ign+Autotune * TechSpecs * Carbon all over * CL XBK5 * DblBubble * Full Givi/Kappas * ASV C5 * Nautilus 140dB * HIDs 6k * Corbin CF x 2 * Thrttlemstr Cruise * Garmin Nuvi * Gold Rad Guard* Block Offs * Spdhlr * 780 grips * Givi Slim Fender * Clear Alt TL
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Old 06-23-2017, 02:53 PM   #25
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PS- OKrider... you still running stock gearing?

Its hella tall and exacerbates the lack of low-end torque (and enhances perhaps the long high rpm HP) that this supersport race-born motor exhibits.

Im 17/49 right now, and it still doesnt lunge forward at low rpm like my speed triple, or sv1000, OR even the gen1 Z1k I had. But it is definitely WAY faster than any of em.. just gotta keep her where the motor is happy.



PSS- hop on a modern 600 supersport.... there's the same "lag" up until damn near 8,000 rpm!
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RIP "Envy" - 11/14/15. Envy 2 - '08 Graphite : Full Fairing * AK20s * Elka Elite* Yosh R77 * Flashed * LARS * BMC * Vortex 49T * R6 Thrttle * GPR V4 * PCV+Ign+Autotune * TechSpecs * Carbon all over * CL XBK5 * DblBubble * Full Givi/Kappas * ASV C5 * Nautilus 140dB * HIDs 6k * Corbin CF x 2 * Thrttlemstr Cruise * Garmin Nuvi * Gold Rad Guard* Block Offs * Spdhlr * 780 grips * Givi Slim Fender * Clear Alt TL
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Old 06-23-2017, 03:38 PM   #26
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I haven't unplugged my O2 sensor, have the BMC air filter and stock gearing. My chain is coming to the end of its life soon (18k, original chain) so I was thinking of doing the gearing changes when I change the whole thing, but that will require a reflash to correct the speedo as well.

So if the airbox mod isn't the solution to my throttle problem, I'd rather wait and do the whole thing at the same time.

I will probably also get an R6 tube at that point since I'm going to switch to Oxford heated grips from heat demon, and install a throttlemeister.

Look at all this money that I don't have
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'08 Red (Pepper)
Perf: Yoshi TRC CF slip-on, VCyclenut, AIS, BMC, Graves VStacks, Lars, R1 shock(Satan V4), R1 forks, R1 brakes(master/calipers), Galfer steel lines
Other: BMS seat, custom highway pegs, ZG touring windshield, T-Rex, Throttlemeister, Yoshi fender elim w/ BMW signals
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Old 06-23-2017, 03:58 PM   #27
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Some oxford grips just came up for sale. Check the classifieds. Save a lil money.
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Old 06-23-2017, 04:13 PM   #28
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Thanks Yamahaman, really appreciate you looking out for me
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'08 Red (Pepper)
Perf: Yoshi TRC CF slip-on, VCyclenut, AIS, BMC, Graves VStacks, Lars, R1 shock(Satan V4), R1 forks, R1 brakes(master/calipers), Galfer steel lines
Other: BMS seat, custom highway pegs, ZG touring windshield, T-Rex, Throttlemeister, Yoshi fender elim w/ BMW signals
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Old 06-28-2017, 06:44 PM   #29
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I have the Vcyclenut flash. Do I have to gut the cat if I'm going for the airbox mod and respective map/flash? Because I don't intend to do that at all.
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'08 Red (Pepper)
Perf: Yoshi TRC CF slip-on, VCyclenut, AIS, BMC, Graves VStacks, Lars, R1 shock(Satan V4), R1 forks, R1 brakes(master/calipers), Galfer steel lines
Other: BMS seat, custom highway pegs, ZG touring windshield, T-Rex, Throttlemeister, Yoshi fender elim w/ BMW signals
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Old 06-29-2017, 02:59 AM   #30
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Email David and ask. He will give you your best answer.
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Old 06-29-2017, 10:47 AM   #31
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Old 06-29-2017, 12:40 PM   #32
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Old 06-29-2017, 01:30 PM   #33
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Yes, absolutely.....
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Old 06-29-2017, 05:39 PM   #34
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Yes, absolutely.....
Thanks boyos for the back...........

It is worth it, should you have proper fueling and timing. Thats where Ivan takes over. Maybe that new guy can too. The bike breathes lean as stock. Increase fuel, you need more air. That is where the airbox mod comes in. I believe Ivan wrote an article on how the stock box breaths and why its necessary to open her up.
Study up and read, open air and more fuel make for a happy motor.......... stock sucks. Let her breath.................
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Old 06-29-2017, 05:48 PM   #35
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Yeah, new guy, cyclenut asks if you have a modded air box and no cat when ordering his tune and he adjusts accordingly. I just wasn't sure as to what extent the changes in the tune were with or without the mod, thus why I suggested emailing him.
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Old 09-20-2017, 08:11 AM   #36
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Yeah, new guy, cyclenut asks if you have a modded air box and no cat when ordering his tune and he adjusts accordingly. I just wasn't sure as to what extent the changes in the tune were with or without the mod, thus why I suggested emailing him.
He told me that the difference between the airbox tune and no airbox tune are so minimal that it's not worth sending the ECU back for a reflash.

The airbox mod certainly made the bike throatier. It was hard to get used to at first, I think the sound gets better once the bike warms up, so going to ride like this a bit. May switch to Ivan's version with the smaller cuts later for quietness.

Performancewise, I think it's a little jumpier in the mid range which I like, doubt it affected the low rpms much. Definitely feels more powerful at the top. Need to ride more before giving an accurate review.
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'08 Red (Pepper)
Perf: Yoshi TRC CF slip-on, VCyclenut, AIS, BMC, Graves VStacks, Lars, R1 shock(Satan V4), R1 forks, R1 brakes(master/calipers), Galfer steel lines
Other: BMS seat, custom highway pegs, ZG touring windshield, T-Rex, Throttlemeister, Yoshi fender elim w/ BMW signals
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Old 09-21-2017, 02:13 AM   #37
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I'd say so all the performance stuff you can afford. Start with the free stuff, gut the cat, and do the air box mod, I've got some of what appears to be vinyl sheeting all around the air box to help guide air in, and is zip tied to a part of the frame just forward of the TBs, I can take some pictures if you want while I have the bike down and opened up if you wanna see. I'd do BMC filter while you're in there. And my bike already has velocity stacks and Ivan's sub plates. As many will, I strongly suggest the FCE, will help a lot with that snatchieness. As far as it being loud goes, I wouldn't really sweat it. I have a Mivv with no db killer, and while its loud, even with all these other mods, I can't even really hear it on the highway with earplugs in. I wouldn't call it loud or droning at all.
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Old 09-21-2017, 04:02 AM   #38
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FCE is ivans old tech that he calls obsolete.
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Old 09-21-2017, 06:21 AM   #39
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FCE is ivans old tech that he calls obsolete.
All done via ecu flash now? Just checked his page and saw that he no longer offered the FCE
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Old 09-21-2017, 06:23 AM   #40
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It is, I know others were having running issues with their bikes and it ended up being the FCE... which come to think of it you were having a missfire issue. maybe unplug it and see if it goes away.
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