Nearly bought a Harley yesterday until...

[popelli]

Not true sorry mate. Most if not all single walled headers will blue with the heat, mixture correct or no. You may've noticed fuel injected bikes do it too no? Some Harley pipes are double walled so as to not blue...some are just heat sheilds so you can't see the blueing...

can you recommend a good eye doctor ?

have 4 Harleys and can't see any bluing on any of the pipes, really think I had better get my eyes tested

really worried now................................






back in the real world, bluing is cause by excessive heat, usually caused by motors running far too lean - also cause by modern emission controls forcing manufacturers to run everything far too lean

[Crasherfromwayback]

back in the real world, bluing is cause by excessive heat, usually caused by motors running far too lean - also cause by modern emission controls forcing manufacturers to run everything far too lean

That's odd. Cause in our real world dyno room that has a pretty accurate gas analyzer, we see pipes going blue all the time. Maybe the analyzer needs it's eyes tested. Perhaps we wasted 120k.

[AllanB]

Single wall chrome headers will blue due to the heat - does not mean anything is wrong. Have a look at a new Bonnie - their headers are built this way. Anyone who has been around bikes for decades should know this!!!!!

Most Harleys and a lot of the aftermarket full systems for them have heat shields on them - made so well now days you need to have a good look. The shield has a gap between it and the actual pipe so it does not get as hot and will not blue. Also makes the pipes look a lot fatter.

Here's a link to Vance and Hines - they use the heat shields and resulting non blueing as a selling point.

http://www.vanceandhines.com/store/s...lsystems/17921


Stainless steel pipes go yellow with use due to the heat - again this is normal - it can be polished out but will just yellow up again after a decent ride.

Titanium will blue with heat also - usually after the first decent run. It then stays that way.

[popelli]

That's odd. Cause in our real world dyno room that has a pretty accurate gas analyzer, we see pipes going blue all the time. Maybe the analyzer needs it's eyes tested. Perhaps we wasted 120k.

strange that, had my panhead on the dyno, everything is spot on, no blue pipes and best of all its putting out more power at the back wheel that a standard evo

am I missing something somewhere??

[Crasherfromwayback]

strange that, had my panhead on the dyno, everything is spot on, no blue pipes and best of all its putting out more power at the back wheel that a standard evo

am I missing something somewhere??

Hp = heat. No Hp = very little heat. But yeah...you're missing something for sure. HP, and the very fact that heat blues exhaust systems. But obviously...I'm not in the real world eh!?