HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
The Hopper Show

another red hot header

4 posts in this topic

but a little different this time. now i understand that a red hot header is the result of a lean condition. and i also know that it can happen when these bikes sit and idle.

now, that said, the last couple times i have ridden my trusty steed, the header has started glowing red while moving. first gear, 10-15 miles an hour, 1/4ish throttle it starts REALLY glowing. now if I increase speed and shift up a gear and get some rpm's up, it cools down significantly.

so the question...why is this doing this all of a sudden? still has stock jetting. and has had a bit of an idle problem this year but all is good once the bike is nice and warmed up as far as the idle. just the last couple rides it has been doing this. :thumbsup:

:smashpc:

Share this post


Link to post
Share on other sites
but a little different this time. now i understand that a red hot header is the result of a lean condition. and i also know that it can happen when these bikes sit and idle.

now, that said, the last couple times i have ridden my trusty steed, the header has started glowing red while moving. first gear, 10-15 miles an hour, 1/4ish throttle it starts REALLY glowing. now if I increase speed and shift up a gear and get some rpm's up, it cools down significantly.

so the question...why is this doing this all of a sudden? still has stock jetting. and has had a bit of an idle problem this year but all is good once the bike is nice and warmed up as far as the idle. just the last couple rides it has been doing this. :thumbsup:

:smashpc:

You say you understand why it's happening, yet you still do not REJET!

:busted:

Sooo, what's the confusion here again?

What it used to do is irrelevant if the jetting is already wrong......and probably partially clogged..........

Share this post


Link to post
Share on other sites

Within all your questions, all your answers lay.

And FYI, 10-15, 1/4 throttle is really not much different than idling. Carb wise, that is.

Mike

Share this post


Link to post
Share on other sites

After I removed the AIS and fitted a 50 pilot jet all glowing issues resolved 4500 ft msl

158 main , NFLR yz 450 f needle 3 clip top . Baffle removed . Snorkel and lid intact .

No bog pulls cleanly from idle to top.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0