Honda TRX700XX Forum - Club700XX banner

Head pipe Question??

4792 Views 21 Replies 11 Participants Last post by  DblXX
Hi..I just brought my new xx home last night..So today I'm just warming it up and staring at it cause the weathers not so nice here in New Jersey..I look across the garage at the xx and the head pipe is glowing red!!!I've had many bikes with many different pipes and never saw that..I called the dealer and they told me it's ok..they said Honda made the head pipe thinner than the older pipes were made..They said they've had alot've calls on this..Is this true??..The xx runs fine..Just kind've worried me..Thoughts??.. Thanks..PS..The xx looks soooo much better in person than it does in the pics..I hope it doesn't hurt sales....
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Congrats on the new XX!

Um... mine doesnt' glow red.
You know, I've never run mine in the dark. My apartment complex frowns upon it. :(

Mine got cherry red after rippin around the yard, the burning paint and oils smelled great too!
My raptor does the same thing, NBD to me.
A tune can help that but not cure it completely.
i just tell everybody thats cause im making all that power, you don't want to mess with my bike. :-D
Yea the bike does look a hell of a lot better in person than in pics, ditto on what everyone else said bout the pipe though
Your not helpfull and even less funny..
Your not helpfull and even less funny..
:confused: Me?
Yea, who are you talking about? Seems everyone gave you an honest answer, what more do you need? :confused:
Yea, who are you talking about? Seems everyone gave you an honest answer, what more do you need? :confused:
Someone apparently needs a nap!
Any mixture less than 14.7 to 1 is considered to be a rich mixture, any more than 14.7 to 1 is a lean mixture - given perfect (ideal) "test" fuel (gasoline consisting of solely n-heptane and iso-octane). In reality, most fuels consist of a combination of heptane, octane, a handful of other alkanes, plus additives including detergents, and possibly oxygenators such as MTBE (methyl tert-butyl ether) or ethanol/methanol. These compounds all alter the stoichiometric ratio, with most of the additives pushing the ratio downward (oxygenators bring extra oxygen to the combustion event in liquid form that is released at time of combustions; for MTBE-laden fuel, a stoichiometric ratio can be as low as 14.1:1). Vehicles using an oxygen sensor(s) or other feedback-loop to control fuel to air ratios (usually by controlling fuel volume) will usually compensate automatically for this change in the fuel's stoichiometric rate by measuring the exhaust gas composition, while vehicles without such controls (such as most motorcycles until recently , and cars predating the mid-1980s) may have difficulties running certain boutique blends of fuels (esp. winter fuels used in some areas) and may need to be rejetted (or otherwise have the fueling ratios altered) to compensate for special boutique fuel mixes. Vehicles using oxygen sensors enable the air-fuel ratio to be monitored by means of an air fuel ratio meter.
Lean mixtures produce hotter combustion gases than does a stoichiometric mixture, so much so that pistons can melt as a result. Rich mixtures produces cooler combustion gases than does a stoichiometric mixture, primarily due to the excessive amount of carbon which oxidises to form carbon monoxide, rather than carbon dioxide. The chemical reaction oxidizing carbon to form carbon monoxide releases significantly less heat than the similar reaction to form carbon dioxide. (Carbon monoxide retains significant potential chemical energy. It is itself a fuel whereas carbon dioxide is not.) Lean mixtures, when consumed in an internal combustion engine, produce less power than does the stoichiometric mixture. Similarly, rich mixtures return poorer fuel efficiency than the stoichiometric mixture. (The mixture for the best fuel efficiency is slightly different from the stoichiometric mixture.)

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So yeah, it sounds like you're running on the lean side, which sound about right like the admin said because these are tuned to have low emissions and usually a lean burning engines means less hydrocarbons in the air.

Lighten up a little.

13:1-13.7:1 usually makes the most power on bigbore engines. 12.5:1-12.7:1 makes the best torque curve.
Oh, btw...that wasn't my words, I dug it up from wikipedia.

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