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Carb Rejetting

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1.5K views 4 replies 4 participants last post by  Crazy Al  
#1 ·
Is there a site out there that deals with carb rejetting? I don't see it in the VTXOA Garage.
 
#2 ·
Sundog said:
Is there a site out there that deals with carb rejetting? I don't see it in the VTXOA Garage.
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Try this Bro.

http://www.vtx1300tips.com/VTX1300TIPS.htm

REJETTING THIS WAS GIVEN BY MAVERICK'S ON THE VTXOA TECH FORUM. Please read this note from Justin before starting. And the one from Highmiles also.
Well I just got done installing my jet-kit. From pre disassembled to completely reassembled and running, including installing new spark plugs, took just under 1 1/2 hours, without too many surprises. The instructions supplied by "maverickgs", his pictures, and the instructions sent with the jet-kit made the whole process quite easy.

I will give just a few extra tips that might help some people.

1. Before I started tearing into everything, I shut off the fuel valve and ran the bike until it ran all the gas out of the carburetor and the engine died. This might help a little with not making too much of a mess of spilled fuel.
2. When trying to remove the gas tank, be aware that the wires for the gages that were just removed in the step before are attached to the underside of the tank with loop that just needs to be bent a little to free the wires. The loop is on the right side of the tank and about 3-4 inches back from the front of the tank. There is also a small vent (?) tube attached on the underside of the rear of the tank near where the seat would be. It easily pulls off and you don't have to worry about any gas coming out.

It really is very easy and not too intimidating. If you have any kind of mechanical ability at all, it should be no problem. The bike started up just fine without any kind of adjustments. And the bike definitely has a little more crispness in the throttle response.
And this from Highmiles:
Rejetting is not as intimidating as it sounds. Just take your time and handle everything with care and don't force anything. Dynojet's instructions are pretty clear. Here are the steps I recommend:

1. Remove seats & spark plug covers at carb side.
2. Disconnect speedometer from fuel tank (just the bottom 3 screws only). Position speedometer out of the way to remove fuel tank.
3. Disconnect the fuel hose at the bottom of the fuel switch.
4. Remove fuel tank mounting bolt and lift up back of tank and pull off fuel tank (this is actually pretty easy).
5. Remove Air box assembly (3 screws, 1 bolt and 2 hoses).
6. Remove vacuum cover (top of carb) & spring, pull out rubber boot. With a Phillips screwdriver, push down, turn and release the plastic piece.
7. Replace the stock needle with the Dynojet needle, install plastic piece and rubber boot (note tab alignment), replace stock spring with Dynojet spring and replace cover.

Highmiles

Continued below for maverickqs instructions.
Rejetting is not as intimidating as it sounds. Just take your time and handle everything with care and don't force anything. Dynojet's instructions are pretty clear. Here are the steps I recommend:
1. Remove seats & spark plug covers at carb side.
2. Disconnect speedometer from fuel tank (just the bottom 3 screws only). Position speedometer out of the way to remove fuel tank.
3. Disconnect the fuel hose at the bottom of the fuel switch.
4. Remove fuel tank mounting bolt and lift up back of tank and pull off fuel tank (this is actually pretty easy).
5. Remove Air box assembly (3 screws, 1 bolt and 2 hoses).
6. Remove vacuum cover (top of carb)& spring, pull out rubber boot. With a phillips screwdriver, push down, turn and release the plastic piece.
7. Replace the stock needle with the Dynojet needle, install plastic piece and rubber boot (note tab alignment), replace stock spring with Dynojet spring and replace cover.


8. Unattach choke lever from bracket at left side of bike.
9. At behind of carb, loosen insulation band clamp at carb side. You may need to disconnect a vacuum hose to get access




11. Pull carb and tilt up to gain access to bottom.
12. Unattach linkage by removing cotter pin and washer.


13. Remove float cover and change main jet with Dynojet's. Be careful not to bend or damage the float. Dynojet's instruction have a pretty good picture.
14. Replace cover
15. Adjust pilot screw (Dynojet says 2 1/2 turns, but according to manual, factory setting is at 2 3/8 - pretty darn close)






You're done! with the rejetting. Now just put everything back together. There's a notch on the carburetor that goes into a cutout in the rubber insulation hose for proper alignment. Pretty easy, eh.
Hope this helps. Here's another picture with the vacuum cover off.






REJET KIT
Try this link.
http://dynamic.dynojet.com/cfml/Jetkits/hondajets.cfm
 
#3 ·
As long as you follow what CSM Lopez posted, and the dynojet instructions you will be fine. Additional pictures are available at http://vtx1300tips.com where a magazine did an article...

Just jump in and do it, take your time, and have fun...I did it a few weeks ago, then took my bike to be dyno tuned....I did not save any money by doing it myself, but it was worth saying "I jetted the bike"...
You do not need to dyno tune if you have patience, there are plenty of helpful articles in here and on the site about dialing her in...
 
#4 ·
Thanks for the replys Husky X and csmlopez. I havev't done the rejet yet but when the weather warms up a bit I will. The info you guys supplied makes it look pretty easy.
 
#5 ·
Great Rejet info: jetting library

http://www.vtxoa.com/forums/viewtopic.p ... ng+library

Go to this link, it is in the forum and gives a ton of set ups for specific pipes, air boxes and geographic areas. Just about every set-up out there is ins here.

If all else fails contact BlueVtx and he will cure what ails you. He is a very knowledgable and a tremendous remendous resource to the vtx community.

Best of luck!