Question about 2005 Suzuki GSX-R 1000

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Remove the stock exhaust and install an aftermarket hot bodies exhaust , Will this cause engine damage if the engine is not re-maped ?

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No it will have no damaging affect on the engine :)

If the exhaust diameter is too large, you will only lose a little back pressure, which will lose low range torque but gain above 8k rpm. If you run a aftermarket air filter, then a remap is a good idea as the extra flow of air makes the air/fuel ration lean out = not good.

Vote me please if this helps you.

Posted on Jul 03, 2010


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2002 twin cam

Stock twin cam engines have automatic hydraulic lifters that will take up any slack in the pushrods. Are you sure you are listening to tappet noise? Have the pushrods been replaced with adjustable ones that are not set correctly? Have you installed a high lift cam shaft? This will cause extra tappet noise. Last of all, check the lifters as the rollers do wear and can self destruct causing some serious damage to the oil pump and other items in the timing chest. They can also cause damage to the engine casing if the roller pin comes out knocking a lump out of the tapper guide which is part of the casing. Any unusual coming from the timing case must be investigated as soon as possible. A stitch in time saves nine especially in these cases.

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2007 Honda 919 exhaust pipes red hot

Hi, Sandy and the usual suspects are:
1. Retarded ignition timing.
2. Retarded cam timing.
3. Bent or burnt exhaust valve.
4. Massive air leak.
5. Intake manifold cracked or damaged.
6. Intake manifold seals have failed.
7. Wrong heat range spark plug.
8. Fuel delivery system running too lean.
9. Faulty Map, O2, MAF, TPS, sensors.
10. Faulty advance mechanism.
11. Faulty VOES switch.
12. Aftermarket exhaust headers tubing too thin.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
Exhaust glowing red
Honda CB900F Service Manual
Honda CB900F Owner Manual

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I would like my vtx 1300 to be a little louder. can i drill a small hole in the back of the muffler to make it louder will this work any pros or cons please

Honda mufflers typically have several baffle walls You may need a drill 14 or more inches in length to punch through enough of these walls to make a noticeable difference. Changing the back pressure of the exhaust will also lean the mixture. This may cause a bad hesitation on take off. This will happen if you change the exhaust system also. To correct the hesitation you may need to install a jet kit on a carburetor model (about $100) or install a Power Commander on a fuel injected model (about $400 plus programming). In both cases your fuel economy will go down. Your stock system has a five year warranty, should not blue like an aftermarket pipe (unless you leave the choke on too long), and have a good long service life. Unfortunately there is no easy solution for your problem. Any aftermarket system will be way to loud (especially on the freeway) and drilling may not give you the desired sound you are looking for leaving you angry and frustrated. Consider a different option, One of the best sound options I have heard was a set of stock Harley pipes adapted to a Yamaha Virago 1100. Most Harley riders change out there exhaust systems before they even ride there bikes which should offer a cheap high quality system that can be adapted to your stock headers with common automotive adapter pipes and custom build it yourself supports (a simple modification of your stock pipe support/mounts). By not damaging your stock system you can always put it back on if you do not get the desired effect.

Apr 09, 2011 | 2004 Honda VTX 1300

1 Answer

Hi,just got a dynojet stage 1/3 kit for my 1980 honda cb650, it's on standard air box, but 4 into 1 exhaust, I take it I should use the stage one kit. Also I have no instructions can you help...

Intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. Stage 1 kits are fully adjustable to allow the use of a well designed aftermarket pipes and stock replacement air filters like K&N. Stage 1 kits are designed to improve throttle response and driveability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.

1. Remove the vacuum slide from the carbs. Remove the stock needles & spacers, noting the order of
assembly. Locate the slide lift holes (Fig. A), with the slide drill DD# 14 supplied, enlarge your slide lift
holes. The picture may not show your slide exactly, enlarge your slide lift hole or holes depending on your
model. Do not drill any new lift holes. Do not drill the needle hole.
2. Install Dynojet needles on groove #4, using all stock spacers. Install the Dynojet washers (2 per
needle) above the E-clip.
3. Remove the stock main jets and replace with the Dynojet main jets provided. If you are running with
stock exhaust, use the DJ110 main jets. With an aftermarket header or slip-on with high flowing baffles,
use the DJ116 main jets. Be sure that the jets you are changing are the main jets.
4. Locate the fuel mixture plug (Fig. B), if you see a screw head, proceed to adjusting procedure. With the
DD #5/32 drill bit provided, carefully drill thru the plugs. Note: the mixture screw is directly underneath this
plug, be ready to pull back on the drill the instant you break thru. Use screw provided to secure and
remove the plug. Carefully turn mixture screws clockwise until they seat, turn out 3 turns.

For further info on this, visit:

You can find the manual for the model you are searching for. Follow the 1st column "CC" to find 650cc models and you can find your specific model after that.

Thanks for asking.
Arvind S Iyer

Oct 15, 2010 | Dynojet Cycling

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What tempature should my rmz 450 run at? Also why does my header pipe get red hot after running for only five min. at idle?

The cooling system on the RM-Z450 was designed for motocross and only works efficiently with air flowing through the radiator. You should not sit at idle for more than a minute or two if at all possible. The extreme high output of this engine causes extremely high exhaust output temperature. The pipe temps can reach 600-800 degrees F plus all the way back to the silencer. This is normal on all modern racing 4-strokes. There are a lot of aftermarket products available that help increase the cooling system efficiency. There are also several products that help insulate critical areas from engine and exhaust heat including shields for fuel tanks/lines, the carb/throttle body, rear shock, and plastic body work.

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2 Answers

Exhaust pipes discolored

It may indicate that but that doesn't mean there's anything wrong with it. If the bike sat for a long time while running, the exhaust can get hot enough to discolor the pipes...but that doesn't mean there's anything wrong with the motor. Improper carburetor settings can make the bike run lean (not enough fuel) which, in turn, can cause a hotter than normal exhaust and discolor the pipes...again, this does not indicate there is anything wrong with the motor. Ask if the pipes are stock or after-market. After-market pipes are a minefield for motorcycle riders. When the manufacturer puts the stock pipes on, they are tuned to the motor to give peak performance which usually results in little to no bluing of the pipes. Aftermarkets can throw the tune off and discoloration is the result. Ask the seller if there have been any changes to the bike...such as after-market pipes, rejetting the carburetor, changing the intake, etc. Most likely the seller will say yes, there have been some changes made. Please note: THIS DOES NOT MEAN THE BIKE IS BAD OR THE ENGINE IS WRONG.

Nov 10, 2009 | 2004 KTM 625 SMC

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My 2007 cobalt won't start-displays ''Engine Power Reduced''...what's wrong with it?

The computer has detected a fault in the emissions system that could damage the engine. It disables the engine so you cannot drive it and damage it. It must go to the shop. This sometimes happens after an aftermarket exhaust system is installed and it was not done properly or if engine modifications were done improperly. This can clog the catalytic converter and cause higher back pressure.

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#18 is the EXUP servo motor
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1 Answer

Exhaust from stock to aftermarket

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1 Answer

2003 honda vtx1300 back fires when cold or hot choke open or not

hello and welcome
backfiring is common associated with a lean condition. if the bike has a stock exhaust and air cleaner setup. most likely the pilot jet or main or both jets may have developed a builup. this is very very common. for this will produce the lean condition and cause popping. you may notice this more on decelleration. if slightly holding open the choke helps this a little bit. that will verify the lean condition. the carb float bowl should be removed and the jets removed and cleaned thoroughly.
if this bike does have aftermarket exhaust it is a good possibility that the jetting needs to be adjusted richer for the lean condition that the exhaust causes. thank you.

Mar 19, 2009 | 2005 Honda VTX 1300 R

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