hello from buzz

[buzz]

Just wondering putting a new pipe on TBR7, will i need to change jet in carburetor? Thanks

[stewbrash]

Since you are de-restricting (no cat, free flowing muffler) your exhaust, it's common to go with larger jets to take advantage of the increased air flow though your motor. It also depends on what you had in it previously, if you had too much (a larger size than necessary), then what you have may be sufficient. It also depends on your altitude. I'm at 6000 ft and a 108 main jet runs like a bat out of hell...with a new exhaust...but if you are at a lower altitude, you may need a 115 or higher.

[buzz]

Originally Posted by stewbrash

Since you are de-restricting (no cat, free flowing muffler) your exhaust, it's common to go with larger jets to take advantage of the increased air flow though your motor. It also depends on what you had in it previously, if you had too much (a larger size than necessary), then what you have may be sufficient. It also depends on your altitude. I'm at 6000 ft and a 108 main jet runs like a bat out of hell...with a new exhaust...but if you are at a lower altitude, you may need a 115 or higher.

Will be installing tomorrow,can't wait

[Skyd]

I would say most definitely, especially if you are still running the stock jetting and are much higher than sea level. These bikes are all pretty lean from the factory already.


I actually need to put my exhaust on also, can't wait to see what kind of difference it makes.

[stewbrash]

Buzz, besides the obvious increase in warp speed, you will also notice that you will not be attacked by the heat from the old catalytic converter. It's like night and day! Most of the heat goes out of the free-flowing exhaust!

[buzz]

Thanks so much, just got done. Will check out in the morning.

[Megadan]

Typical jetting changes when installing an exhaust is 1 full step up in jet size on the main (5 up numerically, aka 105 to a 110), and sometimes 2 if paired with intake modification. Sometimes it may need a small change on the idle mixture and/or pilot jet.

I always suggest starting off on the rich side. For most bikes around the sea level to at least 4000ft a 115 main works well with an exhaust. Good place to start. Adjust from there.

[buzz]

Thanks Megadan

[buzz]

Just want to say best 65 dollars spent,sounds great. Thanks Amazon

[stewbrash]

Yeah, if you got your exhaust from the link for the $65 one, I just checked and they are sold out! I agree, for the HP gain...it was the best $65!

[buzz]

oh that stinks