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General Category >> Rubber Side Down! >> After Installing New Slip On Muffler..
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Message started by Cory on 02/29/08 at 21:28:13

Title: After Installing New Slip On Muffler..
Post by Cory on 02/29/08 at 21:28:13

How will i know if i need to rejet what signs should i be looking for and if i do need to what size jets do i need ? I haven't really gotten the chance to really ride the bike since the aftermarket muffler install just up and down the street so far it seems fine it fires right up like before , no backfires and seems to run decent so far sunday i think i am gonna be able to really ride it as long as the weather holds up so i was wondering what i will need to be looking for to know if i need to rejet while i am out and what size jets or jet i need and where to get it if i do . Thanks .

Title: Re: After Installing New Slip On Muffler..
Post by Reelthing on 02/29/08 at 22:09:47

what after market muffler did you use?

Title: Re: After Installing New Slip On Muffler..
Post by Cory on 02/29/08 at 22:22:16

used a 75 dollar 3 inch turned out slip on from jc whitney i believe the brand is motoasia

Title: Re: After Installing New Slip On Muffler..
Post by Reelthing on 02/29/08 at 22:28:25

US bike right?

don't know about that exhaust - so let's assume stock jet and a SEII turnout - the bike has a 145 main - it needs to be a 147.5 or a 150 without an exhaust change depending on altitude - freeflow exhaust - add 1 size - so a 150-152.5 main

a lot of doc is written on carb tune link in the tech section -

have you pulled the brass mixture plug?

Title: Re: After Installing New Slip On Muffler..
Post by verslagen1 on 03/01/08 at 07:38:53

Definitely read the tech section.

The short answer, if it backfires richen it up, if it belches black smoke lean it up, if the pipe starts to turn blue, it's a tad lean, if the sparkplug is black in the center it's a tad rich, if it's white, it's a tad lean.

Title: Re: After Installing New Slip On Muffler..
Post by T Mack 1 on 03/01/08 at 08:09:59

Quote:

How will i know if i need to rejet what signs should i be looking for

Signs that you need to rejet.... too lean and things get hot, so you may start to see bluing of the pipes. Too rich and you get carbon build up and black smoke.

Most people believe too rich is better than too lean (myself included). Too Lean things can actually get heat damage. To rich causes fouling eventually, but that can be cleaned.....

Title: Re: After Installing New Slip On Muffler..
Post by Cory on 03/02/08 at 20:06:19

ok guys i rode the bike for about 100 miles today ran great only things i noticed is it made a small popping noise if i shifted too fast and backfired if i decelerated too fast and it's not bluing but it does have like a brown discoloration at the head of the muffler so do i need to rejet or just mess with the air mixture screw and white spacer ? other than that the bike has great throttle response and runs great i had it up to 96 miles an hour before it started shakin a little

Title: Re: After Installing New Slip On Muffler..
Post by T Mack 1 on 03/03/08 at 09:31:15

647734323632070 wrote:

Is the brown new?? If so, then it's the start of the bluing.

Title: Re: After Installing New Slip On Muffler..
Post by Cory on 03/06/08 at 21:19:17

yeah the brown is new but there is 2 things i have noticed since that might play a factor and one is when i pulled the exhaust off there was no gasket at the beginning of the head pipe i don't know if it has burned away or someone removed it and never put one back on it because when i got the bike the stock muffler had bluing all over it the other thing i noticed now is that the slip on muffler i put on it is all chrome not chrome plated it's a really thin muffler so that could maybe affect the discoloration too maybe ? i am gonna put a gasket back on the bike and mess with the air mixture screw and possibly cut down the white washer and see what happens . if you think that will take care of it i feel like i am gonna have to buy another muffler and don't want to put alot of money in one .

Title: Re: After Installing New Slip On Muffler..
Post by YonuhAdisi on 03/07/08 at 08:46:31

The header gasket goes inside the head not on the pipe itself, did you check to see if it was in there?

Title: Re: After Installing New Slip On Muffler..
Post by Cory on 03/07/08 at 09:00:25

yeah i checked it is not there