what will stop the poping?

[Skannes]

i have a pro circiut t-4 on my 02' 400ex. When ever i down shift there is a poping and almost a back fire. I tired loosing the air screw, i think it is called. But it hasnt help. What should i do or what do i need to get.

[hondarider2006]

Nice to see someone else from AK on here:cool:



As far as the poping goes, have you rejetted yet?? If not...call up C&D racing, and get yourself a 152-160mj's and a 42 pilot. When they come in, start at the 160, install the 42 pilot and go about 2 1/2 turns out on the mixture screw. Do a plug test and see were you are at. You may think that its fine, but you may find that the 155 is a little better. If you want, you can removie your choke and gain a little throttle response. I have it done on my carb, and have 0 starting problems. PM me if you need any help with this stuff man.

[Skannes]

hellrider2006 . yeah i rejetted and now i have a 156, but i was also thinking about the pilot jet. I'm very sorry to say but i have no idea were they are located!

[Skannes]

i forgot to ask what is C&D's number??

[hondarider2006]

This should help you with removing your chock and the pilot jet--

http://www.exriders.com/vbb/showthread.php?s=&threadid=9144


C&D racing's phone # -- 308-696-7805

[gate_keeper_32]

Do you have any exhaust leaks? If you do, this will cause popping and backfire almost every time.

[gate_keeper_32]

BTW


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3138&item=5536514737&rd=1

[hondarider2006]

Originally posted by gate_keeper_32
BTW


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=3138&item=5536514737&rd=1


Whats the hooked on phonics for, he was asking about jetting:huh

[Skannes]

hey Gate_keeper i think i might have a leak. I was looking at my pipe for one and were my head pipe and my silincer conects is loose. do you think thats it right there and if it is how would i stop it from leaking, is there a lube or a puddy i can put around it or would i need to get a hole new head pipe and silincer?

[hondarider2006]

Get some high temp. silicone from your local harware store:cool:

[Jay300ex]

Originally posted by Skannes
hey Gate_keeper i think i might have a leak. I was looking at my pipe for one and were my head pipe and my silincer conects is loose. do you think thats it right there and if it is how would i stop it from leaking, is there a lube or a puddy i can put around it or would i need to get a hole new head pipe and silincer?

You can use a high temp sealant or you can do it right and get a new crush gasket for your pipe and tighten it good.

Popping usually means a lean mixture, but sometimes a rich mixture (if the carbs are over emulsifying the fuel it can cause some really weird symptoms). If you downshift and let go of the gas, that is the pilot circuit, if you hear popping when doing so then your pilot is probably to small. If you do the same thing with 1/4-3/4 throttle, that is your needle clip posistion in your slide, raise the clip to lower the needle and lean out the mixture in that RPM range, and the same goes for full throttle.

Hope you fix it up.

[Skannes]

i dont think it is a lean or rich mixture it happens every time i ride and it almost sounds like it is gettin worse
but thanks anywayz i'll look into that