Jump to content
Sign in to follow this  

Header Wrap

Recommended Posts

Here's a pic of my header wrapped:

garage.php?do=viewattachment&attachmentid=1891

The wrap is a beige color but I painted it after it was wrapped.

It definitely makes a difference. The bike seems to have lost just a little bottom end but is pulling better on top. I have a 45 slow jet, needle clip in the 4th slot & a 120 main jet. The 125 jet was a little too fat I think a 122 may be the ticket. The bike is not popping or backfiring in any of the circuits. However, I think it may be on the lean side in the middle circuit, affecting it's ability to wheelie in second. So, I'll move the needle down to the 5th slot & see if that helps it pull better. It's on the edge of being too fat with the pilot screw. So, I can't get any more there.

I think this mod will be great for running enduros where it's flat out fast all the time. For some of the nastier goaty trails this mod so far is a bit of a negative (not much) but that may change with some jetting changes.

:)

Share this post


Link to post
Share on other sites

im at 300 above s.l. and i have the same setup as you expect i have the 122 main. (accually a 122.5 **1/2**)

yet it still pops, pondering about a 125main.

if you wanna sell ur 125m give me a "ringgy" :)

Share this post


Link to post
Share on other sites

Is it popping on decel? If so, than it is not your main jet. Reread the stickey for what circuit controlls which opening.

Share this post


Link to post
Share on other sites

250Thumpher i am truely impressed by how much thought you have sunken into the stickey. I never looked at it again after i first read it. (about 2months ago.)

********TO EVERYONE ELSE, IF YOU HAVENT ALREADY LOOKED AT THE STICKEY AND YET YOU STILL HAVE QUESTIONS, LOOK AGAIN.*******

250Thumpher :):D:):p

Share this post


Link to post
Share on other sites

Actually, too big of a main jet can cause some popping with a sudden turn off of the throttle. A little different than just having the throttle closed but still popping caused by the main being too fat. I've had it & fixed it by going smaller on the main jet.

Share this post


Link to post
Share on other sites

Just a jetting update on the header wrap mod.

45 pilot, clip in 5th slot(lowest) on power up needle,120 MJ

Moving the clip down one was the ticket! :) Pulls the front wheel up better in 2nd gear then it did with it in the 4th.

:)

Share this post


Link to post
Share on other sites

Hey toast, mind telling us ur elevation, average temp, weight, you know........ stuff like that?????

Share this post


Link to post
Share on other sites

elevation: 200-2500ft

temperature: 50-60 deg

This bike is super light! :p:) Weighs less than I do with gear on. :)

Does that help you?

Share this post


Link to post
Share on other sites
You are going the wrong way,Brother. !st drop the clip to raise the needle to clean it up &/or start dropping down on the main jet size.

brother? also, who might you be speaking to? Me, Toast? 250Thumper???

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

Reply with:

Sign in to follow this  

×