Just added Vance & Hines long shots. Have not modified air intake. Exhaust pops at idle, runs smooth when u pull back on the throttle a hair. Can i get away with jus adjusting the idle mixture? If i need to rejet do i need to change out only the main jet or the slow jets as well??
2007-05-31 08:59:55 · 11 answers · asked by king5428 1 in Cars & Transportation ➔ Motorcycles
Every bike is different. Adjust just the mixture MAY do it for you. But I find many carbs don;t offer enough range. Also, the mixture screw is really only affecting idle and low rpm mix. If you get the pops at higher speeds or from a highway speed decel, likely you will also need to shim the needle. You can get carb needle shims at any motorcycle store. One may do it. this raises the needle a bit and allows more fuel at mid range.
While you have the top half of the carb apart, pull the slide out and enlarge the hole in the bottom just a bit. This will give better throttle response and is equivalent to changing out the spring that most jet kits provide. If you add a better flowing intake, you will then need to get one size larger pilot jet, and perhaps one size larger main jet, depending on your altitude.
No need for a jet kit. Waste of money for what you get.
2007-05-31 09:51:33 · answer #1 · answered by jimboni 2 · 2⤊ 0⤋
you might be able to get away with a float adjustment, idle mixture is just that the mix of air and fuel at idle. every bike is different, and different things work differently,IE: some bikes can take a ### main jet. but your friends bike that has the same modifications, is sitting next to your bike, and has the same engine, may have to have a ###+3 main jet to idle, and perform the same as yours, and everything has to be set differently.
there is no sure answer when it comes to carbs. and it is hard to find good carb people any more.
2007-05-31 10:12:03 · answer #2 · answered by godz68impala 3 · 0⤊ 0⤋
Try turning the air idle mixture screws in a 1/4 turn to decrease air and increase fuel at idle. this may fix the problem.If the engine over heats you may have to increase the size of the idle jets as well as the main jets.
2007-05-31 10:10:58 · answer #3 · answered by (A) 7 · 0⤊ 1⤋
Vt1100 Shadow
2016-12-10 13:27:18 · answer #4 · answered by ? 4 · 0⤊ 0⤋
That's all you'll need to do.
Richen the idle mixture (open the mixture screws - counter clockwise).
1/4 turn at a time until the problem is solved.
You'll have to remove the blind plugs to get at the mixture screws.
2007-05-31 09:21:38 · answer #5 · answered by guardrailjim 7 · 0⤊ 1⤋
if what guardrail said solves the problem also on decell on the street u'll be ok. but if it pops when ur slowing down from a light, u should do a rejet. and do both jets. they come in a kit.
2007-05-31 09:31:29 · answer #6 · answered by forktail_devil 5 · 1⤊ 0⤋
you should do a jet kit to get the most and you only change mains and adjust idle mixture
2007-05-31 09:30:20 · answer #7 · answered by wonderboy n 5 · 0⤊ 1⤋
check your plugs, run it hard then cut ignition and pull your spark plugs, should be chocolate brown (lite). You will get a little popping at low RPM because of less back pressure with the vance and hines. I have drag pipes on my harley and same thing.
2007-05-31 09:30:27 · answer #8 · answered by Anonymous · 1⤊ 1⤋
Every time i ask a question, even if its the easiest one, nobody can give me a good informed answer . What happened to people that actually make the effort to write an answer??
2016-08-24 04:14:34 · answer #9 · answered by ? 4 · 0⤊ 0⤋
mines a newer 04 and you have to re-jet newer bikes because they dont have air-fuel screws.....
2007-05-31 10:40:24 · answer #10 · answered by DennistheMenace 7 · 0⤊ 1⤋