Question about 2004 Honda VFR 800

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Exhaust port clean

Honda VFR 800 1998 fitting a new exhaust system and noticed that number 3 exhaust port is very clean but the other 3 cylinders had some carbon build up is this normal or what could it be at fault?

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Check your valve clearances as soon as you can to eliminate problem from those.

Posted on May 28, 2009


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2000 Honda VFR 800 how to remove the exhaust

Hi, Paul for this scenario you will need your service manual, parts fiche, and owners manual if you can't find the best tool you ever bought for your Honda, despair not, for a mere zero $0 you can download another one.
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.
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Aug 08, 2012 | 2000 Honda VFR 800

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Homelite mighty life

The hottest part of the cylinder is around the exhaust port, so if it has partly seized you will see some damage/ piston scuffing by removing the muffler and taking a look through the open exhaust port, any sign of damage and you need to decide if its worth taking apart and fitting new parts, you may get away with cleaning any alluminium stuck the the cylinder wall and fitting a new piston, if there is no sign of damage you may have been lucky.

Jun 25, 2012 | Garden

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1995 Honda VFR 400 R NC30 misfiring

Hi, Daniel and the usual suspects are:
1. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a cursory reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead-acid batteries.
2. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
3. Spark plugs in bad condition or partially fouled.
4. Spark plug cables in bad condition and leaking check for spark leakage in the dark
5. Spark plug gap too close or too wide.
6. Faulty ignition coil, module, and or sensor.
7. Loose, dirty, or corroded ignition module connector at crankcase.
8. Faulty CKP or CMP, MAP, ETS, ATS, TPS, O2 sensor.
9. Dirty air filter.
10. Intake air leak.
11. Water, dirt, or rust in the fuel system.
12. Carburetor contaminated, sticky float, plugged jets.
13. Carburetor vacuum diaphragm torn, cracked, not seated or installed improperly.
14. Multiple carburetors out of sync.
15. Fuel filter clogged.
16. Old or contaminated fuel.
17. Fuel tank vent system plugged or carb vent line closed off.
18. Gas cap diaphragm valve faulty.
19. Vacuum line from intake manifold to fuel valve is broken, cracked, pinched, or missing.
20. Carburetor controls misadjusted.
21. Incorrect valve timing.
22. Valve springs floating, weak, or broken.
23. Damaged intake or exhaust valve.
24. Incompatible performance parts.
25. Control module may be in "LIMP" mode
26. Check for engine trouble codes.
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. Honda VFR400 Running on 3 cylinders
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Honda VFR 400R Make Model Honda VFR 400R NC30 Year 1992 Engine Four stroke...

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Apr 05, 2012 | 1995 Honda VFR 400 R NC30

1 Answer

Does any exhaust fit a yamaha thundercat providing I have the correct link pipe?

You could fit any exhaust, But exhausts are designed for specific engines for a reason. They work best when they are used on the correct engine. Lots of things are taken into account when designing an exhaust, such as capacity, rev range and number of cylinders. An exhaust from a Honda SS50 wouldn't work on a Fireblade, so buy the correct one for your bike, it will be worth it.

Mar 08, 2012 | 1998 Yamaha YZF 600 R thunder cat

1 Answer

2004 Honda VFR 800 once warm starts to smell like burning rubber

Hi, Adrianhearst I would inspect the exhaust system and check the rear wheel for rubbing and pieces close to the pipes, 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.
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Nov 16, 2010 | 2004 Honda VFR 800

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I turned my 2003 Honda VFR on this morning and i heard a rattling in engine. I turned it off and turned it back on and it went away. should i be worrying?

It could have just been a small piece of carbon flaked off inside the cylinder and was in between a narrow space between the piston and head or between the exhaust valve and seat but broke loose and blew out the exhaust

Aug 19, 2010 | 2002 Honda VFR 800

1 Answer

Ive got a 1998 Honda vfr 800. In 6th gear there seems to be a hissing noiose coming from the motor. Its only under acceleration and doesnt happen in any other gear. Its not the typical V4 sound - like a...

It could very well be a leaky exhaust system. Today's exhaust systems are made up of various pieces that interconnect to each other. Some of the connections have gaskets, others don't. Most of the time when you've got a leaky exhaust system, you'll also start getting a popping noise out the pipe when you back off the throttle at high speed. Go around and tighten everything up and check for leaks for passing your hand around each connection with the engine running. Don't burn yourself. Keep in mind that the exhaust system expands when it gets hot and it might not leak cold but start when it gets hot.

May 20, 2010 | Motorcycles

1 Answer

2003 Honda CR 250 R oil leaking front of the exhaust pipe

Hi, Anonymous and the usual suspects are:
1. Engine oil over filled.
2. Piston rings worn past service specs.
3. Broken piston rings.
4. Piston pin retaining clip failure.
5. Cracked piston.
6. Broken piston ring lands.
7. Hole in the piston.
8. Valve/guide clearance worn past service specs.
9. Worn out valve seals.
10. Crushed or loose valve seal.
11. Gouges in cylinder walls.
12. Cracked cylinder or head.
13. Blown head gasket.
14. Crankcase breather blocked or hose pinched.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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May 20, 2010 | 2003 Honda CR 250 R

1 Answer

Vfr 400 has poor performance at low RPM, any

Try a compression test of your cylinders ,and check your valve clearances .

Apr 26, 2010 | 1988 Honda VFR 400 R NC24

1 Answer

Firing order

These things operate on what is known as a wasted spark system. There are two coils each one has two spark plug leads coming from it. One of the coils fires cylinders number 2 and 3 the other one fires cylinders number 1 and 4 . Each coil fires both leads at the same time. Hence one of the sparks is wasted each time. If you could see the pistons going up and down in the bores you would notice that numbers 1 and 4 go up and down together and that numbers 2 and 3 go up and down together. When 1 and 4 are at the top. 2 and 3 are at the bottom. and vicea versa . If number 1 is on the firing stroke number 4 will be on the exhaust stroke. Also the same for number 3 (firing) number 4 (exhaust) Thats not exactly what you asked i know. But i think it will help you to understand how the plugs fire on most Japanese across the frame 4 cylinder motors.

Apr 01, 2010 | 1988 Honda CBR 400

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