Brock's Performance

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General (164 FAQs)
Some answers are model specific, some are not. These are general answers that apply to most late model fuel injected bikes.


Top 100 FAQs For This Topic
Do you have a gear ratio calculator?
Calculate your gear ratios
Would Brock’s Performance create an ECU flash with ignition timing so aggressive that I would be forced to run race gas all of the time?
How does Octane affect my bike's power and performance?
Why has my FI light started coming on when the bike is decelerating? I cut the wires at the pressure switch for the clutch (so I could start the bike without pulling the clutch in).
My Suzuki GSX-R1000 (Or Hayabusa) misses and stalls abruptly when I pull the clutch lever in – Do I need a Map? Is my Power Commander bad?
Does Brock's recommend the use of K&N or BMC aftermarket street or race air filters?
Is it ok to mix race gas and pump gas with Brock's maps?
I have the air box mod instructions for my GEN 1 Hayabusa. I don't have a Power Commander, but wanted to know if this modification would improve my mileage and horsepower. I have OEM air filter and Yoshimura Bling 22 4-into-2 exhaust.
What are the expected gains going from stock everything to a Brock's Full Exhaust and PCV with Map in a GSX-R1000? I know there are a few more factors involved in this equation but I would like rough estimate. Thanks
Dyno Testing with a Sidewinder--baffle in or baffle Out?
What is the benefit of running a non o-ring chain on the track, and why can't you do any riding on the street with it.
What is the best oil and weight to run in my 1397 Hayabusa.
Regardless of the style/type of lowering links you offer, do I need to additionally purchase a shortened kickstand? I'm looking at the adjustable models for racing - will the stock kickstand still support the bike if I have dropped the rear?
I just bought a Billet Cam Chain Tensioner and I was wondering if you had the spec on how to put the right amount of tension on the chain or how to set it up?
I originally thought when I installed the TRE, on my Suzuki Hayabusa, the mapping was changing when you shift through the gears but I believe the mapping isn't changing, it's just shutting down the fuel pump in 6th gear. Is my theory correct?
Can I purchase Brock's Performance custom maps to download and get more HP?
What is your take on E85 Fuel? Should I use it in my motorcycle?
How much nitrous will my stock pistons take?
Nitrous to stock pistons
I have a drag bike with all of your stuff on it and a Sidewinder. Where is the best shift point on this bike in rpm for best ET?
I have a 2008 Hayabusa with the following items; Power Commander with your supplied Map, Air Shifter, Brock’s Exhaust system. I'm running 9.4 the 1/4 of mile. Someone told me that the ignition module is necessary to run below the 9 seconds. Can you provide some advice?
Rear sprocket for a Hayabusa and want to know how many teeth should I go with that would not effect my top-end. I am down one in the front. The bike will be used for quarter mile 10% of the time and the rest will be road racing on the highways. I have your 1397 kit!
Is there a general rule of thumb for gearing when adding more length to the wheel-base?
I have a 02 GSXR 1000 with cams, ported head, exhaust and your modified ECU. Does the ECU have learning capabilities? My bike doesn’t have an O2 sensor, but I have been told I don’t need to use my power commander, my computer will tune it self.
On my stock length bike my gearing was set up to go through the traps in 4th gear in the quarter mile. Now that I have extended my bike 6 inches should I change the gearing to go through in 5th?
I'm currently in need of suspension help on my 05 gsxr 1000. Do you have any advice on setting my STOCK shock on my bike. For 2005 GSX-R 1000. Swingarm is 8" over and I weigh 185lbs. Is my suspension to blame for not getting my u-soft to hook with stock engine.
Stock shock setup
I am considering buying ceramic coated wheel bearings, but I'm having trouble finding info on what kind of improvement I can expect from them. Could you tell me what kind of gains in MPH and how much should they help lower my ET's?
I have a 2008 ZX-10R with nitrous oxide that makes 216 RWHP. Will removing the secondary butterflies give me a performance gain? Also, what can I do to the clutch setup to help achieve a better 60 foot time?
What is the best gearing combination for my......
What is the biggest wet "shot" you would put on a ZX-14 with STOCK motor?
Biggest wet shot on stock engine
I have a Streetsmart 3 system with PC/USB for my Hayabusa. The rev limiter seems to kick in at 9500 and then the FI light flashes. I checked the trouble codes and get 32-35 which correspond to injector malfunction in all 4 cylinders, but the bike is running great. Any idea on what's going on?
Can I use Brock's maps with fuels in different countries?
I have the flies out and a GI Pro aTre on my ZX-14. Which position on the aTre should I use for your map, 1st gear, Neutral, 5th gear or 6th gear?
How long can I keep Alisyn oil in the bike (how many passes)?
Replacement parts such as headers and mid pipes..Does Brock sell these items individually or if the part is damage you have to purchase a whole new full system? ..I see there is no section on yur site for order replacement parts other than mufflers
I purchased your cushion kit for my mk1 bandit,with gsxr clutch fitted. In my current configuration I have my lock up set to throw the lever. Should I just stay with the same static pressure (ie not use springs supplied)?
Why don't you provide Ignition Mapping for your exhaust systems?
How is the less than zero weight oil going to perform on the street? I do still ride on the street some.
I am trying to choose between the Brock's Alien Head full system or a sidewinder. My bike has a stock motor, but in the future it will be built. I was wondering which exhaust would be the best for a stock motor, but I also want to use the same exhaust when I get the engine built. I want the right exhaust that is going to get me peak performance.
Im buying a short meg 2 for my 08 busa this week, i have a power commander V with autotune, do i need to load the brocks map and then let the auto tune take over or will the auto tune tune it correctly without a base map? Essentially does the autotune do away with the brocks map on the PC? Thanks paul
How do I keep my 2008 Hayabusa with a 6 inch swing arm conversion from spinning the 210/50 17 rear tire at 6,000 rpm or from the blocks? I am in South Africa.
Why doesn’t Brock’s carry all the aftermarket items I want?
On your BMW, why do you use the chain (Regina ZRP) which has the o-rings picked out instead of one that comes without them. (EK 530DRZ2 for example)?
O-ring vs non o-ring chain
How do I get quotes for an international sale?
I'm degreeing in two intake cams on my Busa and I would like to know what lobe centers to put them on. The motor is fairly stock with a Yosh header, 4-2-1 style with an exteneded arm, set up for 4 gears in a 1/4 mile and I weigh 220. Also, it has a Dyno Jet Power Commander and has been dyno tuned 159 H.P.
Which is the best fuel control system? The Bazzaz with an auto tuner or the PCV with an Auto Tuner? I have a K&N air filter with the Brocks Alien Head full system.
How do I gain access to Brock's Private StreetSmart Owners Section?
I have a new 08 Hayabusa and added the following; Alien Head Exhaust, Power Commander USB III (Brock’s Track map), O2 sensor jumper, Cycle-Tek airshifter. A few days ago when I was using my airshifter I the FI light started flashing. When I shut the bike off it won’t start and when I wait for 10 minutes it starts. I also ordered a new Power Commander, to see if my current one is the issue.
I bought a Street Meg and Power Commander from you guys. I was wondering if it would be okay to break the bike in with that installed or if I should leave it stock for a while before installing the parts?
Brock this may be my mistake but I thought I got access to most all the forums on you're site as a customer. I have access to the street smart forum but am locked out of almost all other advice forums.
I am currently racing a 2006 GSXR 1000. If I lower the bike will my ET come down?
Lowering effects on ET
Had my first few passes with the Sidewinder and low profile oil pan on my 02 Hayabusa with 1397 motor this weekend. I got my bike a full 2 inches lower. I only got 5 passes in but already knocked 0.198 off my ET! Also, that’s after 5 months of no riding. I LOVE it. What 60’s should I be looking for? My best was a 1.49 but I know there is more in it as I can hit it so much harder off the line now. Also, I have the LM-1 data logger. What A/F ratio should I be aiming for?
Will running MR12 require mapping changes compared to Brock's street maps?
I have the Muzzy Dry shot system on my ZX-14 with a Schnitz window switch. I have it set up to come on at 97% TPS and 8250 to 11000rpm. The flies are removed,and I have a BMC Filter. For Drag events I have been using an Australian made Race Fuel Martini 110 (Ron 109.6, Mon 100, SG .840,Oxygen 3.5%.)I have used the Dry Shot at one event and I added 10% more fuel at 100% TPS from 8 to 11000 rpm on my current map. Would you suggest that I remove the nitrous? Which map would you suggest I use for the track with or without the Nos? Could I use leaded fuel in the bike just for drag events?
After my ride today I noticed that the end of my exhaust pipe was wet with a very watery substance. Normally it is dry more like soot. I was wondering what could this be caused by?
I have aftermarket or 'different than stock' velocity stacks, do I need a new map?
What is your opinion on going down 1 tooth in front and up 1 tooth in the rear on my ZX-14. I have never done any track racing but wanted the most seat of you pants feel but still ride everyday.
Gearing
I have your 200 MPH Package with 40 tooth sprocket, ceramic bearings, Power Commander Digital Ignition, Wideband Commander, LCD, no sec, multi function hub, etc. Maxton map kicks ass, do you have one with ignition table though? I’ve read to advance timing 4 degree’s 0-6000 RPM on some Ninja forums, and to retard at higher rpm’s. Have you tested this? I have advanced timing as stated above, but not retarded any in the upper rpm’s because no one has the numbers as to how much. Note: My bike riding style is for high speed, not drag.
What is the best octane for the best fuel MPG? Do you have suggestions to improve my fuel mileage?
On your 240 swingarm kit with the built in air tank is it possible to use the air tank as an nitros tank , online it says your tank will hold 200 psi.
Can I use VP MR12 gas in my 1397 Busa?
I have a 2008 hayabusa and purchased the front/rear sprockets from you. What are the torque spec's for the front sprocket and the rear sprocket nuts?
Which one of your exhaust will be the loudest on a hayabusa?? I'm looking for a nice loud sound.
I have a full brocks shortmeg exhaust fitted on my bike with a K&N air filter, PC5 with your custom map downloaded on my 2007 GSX-R 1000. I recently had Don Guhl Flash my ECU. He recommended that I remove the TRE. I was just wondering if that was correct? Also, do I now need to have the bike tuned on a dyno?
Would the ignition module from Power Commander help in drag racing?
I just recently pulled the head off of my brand new motorcycle because the throttle bodies were gummed up and there was a sticky film in the intake track...why did this happen? Does race fuel cause this?
What gear change can I do to my 2007 GSX-R1000 with the stock length chain?
The piston kit for my 05 Suzuki Hayabusa, I’ve just receive, on three pistons, we are out of tolerance. We have 0.55/0.6mm on the second piston ring and on the notice it's 0.4! Is it normal or not? Can I put it on my block like that without negative action (smoke in the block)?
I am running a Shinko 003 in the 200 size. I've had good success running 25 psi, but read info from the forum where Brock states 18 psi in rear. Can I go that low without screws to hold the tire on the stock wheel?
With the LM-1 RPM Kit; Does this record RPM and A/F ratio only? Can you also record throttle position? I ask the second question because after my last remap on the dyno, the guy didn’t spend enough time on the low rpm/throttle opening and my 60” suffered. It would either bog off the line if I used my normal launch, or break traction or wheelie from a higher rev launch.
I just bought a Wideband Power Commander for a 2006 Busa with a Brock's Sidwinder and was wondering where is the best place to mount the bung for the O2 sensor.
Mounting O2 bung
How much race fuel (MR12) should I run? How do I clean the fuel system after the race?
May I use an ECU flash or editor with my Brock's exhaust system?
What is Savage Mode?
Do I just have to pull the flap out of my air box for the air box mod or do I have to cut the tunnel out where the flap was? And also my bike is in the rev limiter before it hits the red can I get some info on this also?
I currently have a map from you in use. The only concern I have is that when I am using my air shifter which is 99% of the time that it back fires and shoots about a foot long blue flame from my exhaust. Am I running rich or lean?
How come the welds on your stainless exhaust systems aren't as good looking as other manufacturers?
Exhaust Welds Explained
I noticed MR12 and MRX01 are LEADED fuels, are they okay to run in my bike?
Does Brock recommend mixing pump gas and racing fuels?
What does Brock’s think about the straight pivot links available today?
I have a 2006 ZX-14 and I'm installing a 240 wide tire kit that's extended 6 inches. Do you have an exhaust that will fit?
If I were to buy the ignition module for the PC3usb, is there map support for my ZX-14?
I put a K&N filter in my bike before I read your post about leaving the stock filter. Should I put the stock one back in? I am going to install an ignition module and quick shift, will I need a new map for that?
Can I put the Brock's Performance logo on my race suit and/or other items?
Logo Use
I have an 08 Busa and plan on purchasing an exhaust from you. I wanted to see if you had a map for the BMC street filter and 93 octane gas?
What's the lightest weight oil u recommend for street use on the ZX-14 and what brand? What's your opinion on NGK Iridium plugs?
I've recently purchased a set of BST Carbon Fiber Wheels with ceramic wheel bearings. After only a few hundred miles it appears as if the bearings are leaking grease. Is this normal or something I should be concerned with?
Wheel Bearings Leaking
On an 08-12 Busa does the stock oxygen sensor go back in the exhaust? The opening for it is blocked off.
I had an incident that dented the bottom tube on the left header, on your exhaust system. I looked through tube and can see the exhaust port has almost a D shape, I just wanted to know if this would severely affect air flow?
Dented exhaust pipes
Should I buy the TRE or X-TRE for my 2009 Hayabusa?
Have you had any issues with "YOUR" 1397 kit and overheating? I have read that is an issue with some kits and I live in Phoenix, AZ and do ride my Busa regularly in addition to the track.
1397 Overheating issues
K & N just came out with their air filter for the 08 Busa. Have you guys had a chance to do any testing with it yet? Also I’m in the process of buying an Alien Head full system with PC and would your maps support the air filter or should I run with stock filter when I get it?
I have your Alien Head exhaust and PC3. I have just moved from Europe to El Paso, TX. The bike is hesitating and back firing a lot. I am told it is because of the high elevation. Keeping in mind I have yet to reinstall your street map, what shall I do? Will installing the street map take care of this or do you have another map for high elevation. Also, what ever the recommendation, please explain how high elevation affects the drivability of the bike.
Are the three buttons on my PC3 USB for increasing RPMs at idle, or should I leave these alone?
What is the best pump gas to run with a stock motor, Sidewinder, and your maps. Have you figured an easy way to drain fuel from the tank?
What spark plugs should I be using in a bike with a 40 shot of wet nitrous?
What is 'Brock's launch technique'?
Brock's drag technique works for rookies, but you will see pros use it also!
Which one is the louder exhaust the alien head or the generation 3 exhaust. An with the full system does that include the headers. For a 2006 hayabusa
Why does the idle increase after about 10 minutes of riding on my 1361 Hayabusa with basic head clean up and Alien Head system?
Is it okay to let the MR12 fuel sit in the tank? I've heard that it must be drained unless you want to cause serious damage to fuel pump and fuel lines ($$$).
I have an 07 Busa. I had the Brock’s Street Meg and bare necessities kit installed and now my Speedo is off. Is this normal or should I take it back to the shop? How can I fix this problem?

Recently Added FAQs To This Topic
Hi there I drive a 2015 bmw s1000rr 5-10 inch over stock swing arm bst wheels When Jeremy ran the 8.44 on the bmw what gearing was running my best time I have dont on bike was 9.2 60ft 1.5 I was using the hearing 15/56 So would it better my 60ft if I do 16/57
Hi I purchased your Clutch spring spacer kit for 2004-2007 zx10r and they do not seat into the "retainer" or "bucket" on top of the springs, way undersized. I tried a 2004 and 2005 clutch. Could it be packaged wrong, or what am I doing wrong here cause it doesn't make sense.
Wondering which power commander I should purchase. Either the pc 3 or the pc5 what do you guys recommend. Driving a hayabuda 07
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