Question about FMF Power Bomb Titanium Header Yamaha YZ 450 F 2007-2009 WR 450 F 2007

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Pipe is glowing red running to lean - FMF Power Bomb Titanium Header Yamaha YZ 450 F 2007-2009 WR 450 F 2007

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2 Answers

I have a Honda xr 100 dirt bike when running exhaust seems to get red hot in front pipe on bike is there a problem

Hi, Shaun on a 2 stroke no on a 4 stroke yes 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. After market exhaust headers tubing too thin.
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Mar 14, 2017 | Honda Motorcycles

2 Answers

Why exhaust pipe glowing red

valve settings not correct is usually the problem

Feb 17, 2016 | Red Motorcycles

2 Answers

Yamaha xt225 serow front exhaust pipe glows red within 5mins of starting also running rough

Fueling issue running far to lean, choke makes the circuit richer so it will run , lean running causes over heating and serious engine damage if its running red hot, check the plug for white burnt or blistering will show lean running. Compression test to make sure the piston ring and barrel are not damaged over 110psi. Is the exhaust blocked restricted or dented ?

Mar 31, 2012 | Yamaha Motorcycles

1 Answer


Glows red, wow thats potenional damagaing to the engine. Possibly to lean, check for restrictions in the exhaust.

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Dec 02, 2010 | 2001 Suzuki SV 650

1 Answer

Glowing RED exhaust pipe

try a bigger jet or its going to cause some damage. You can pull the choke on to get some more fuel in to cool it .
Check that the cam timing hasnt been played with, some change the exaust cam by a tooth to copy yz specs, on top dead centre, there is a little arrow on each cam that lines up with the rocker cover surface

Mar 09, 2010 | 2003 Yamaha WR 450 F

1 Answer

Head pipes are glowing red hot at stops

If your pipes are glowing at stops it's because you are running too lean. Running that lean will weaken the valve springs destroy your exhaust gaskets, and destroy your pipes as well. It's an 2002 so rejet the carb for whatever your combo is. Make sure you are running a #48 pilot jet and if the mixture screw has been tampered with , it should be about 1 1/2 turns out.

Nov 04, 2009 | 2002 Harley Davidson FLSTF - FLSTFI Fat...

1 Answer

My 450f was dripping coolant out the overflow and i looked over and my pipe was glowing red but the bike didnt take long to cool down once i stoped it

has any recent work been dont to the carburetor? sounds like its running lean,which will cause it to over heat and offen the pipe will glow

Jun 20, 2009 | 2003 Yamaha YZ 450 F

1 Answer

VTX1800R-03 exhaust overheating

did you re-jet when you put the pipes on? a too lean mixture can cause pipes to glow red hot

Apr 01, 2009 | 2008 Honda VTX 1800 T

1 Answer

What aboute the exhaust get realy red and orange on the exit of the celinder

If this is noticeable in the daylight, your fuel mixture is probably running very lean (not enough fuel) and you should not run the bike until you find out why (carburetor issue possibly). If you only notice this at night, a dull orange glow is not unusual, if it is bright red or goes very far down the pipe your mixture is probably lean.

If you continue to run the bike in a lean condition you will likely damage the engine severely, blowing the headgasket or burning the valves.

Feb 27, 2009 | 2003 Yamaha YZ 250 F

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