Just got a dynojet kit, stage one, for a 300ex on ebay, yet it came with no directions. What do i do to make this work and optimize it's ability to increase performance in my bike? Installation etc...?
2007-05-13 15:12:26 · 5 answers · asked by Anonymous in Cars & Transportation ➔ Motorcycles
The first thing you have to ask yourself is, "Do I need a jet kit?"
Does the bike start easily? Does it idle smoothly? Does it accelerate cleanly through the entire engine rpm range with out any stutters, hiccups, bogging or nosing over?
If the answer to these questions is yes, and especially if you have a stock exhaust pipe and air filter, then you don't need a jet kit. Even though Dyno Jet's advertising claims differently. The fact is, if your getting a good lug reading and the engine is running cleanly, your jetted correctly, and changing jet sizes isn't going to do anything but make the engine run richer (or leaner if you go backwards).
Re-jetting a carb is not necessarily a hop up, or a performance gaining modification. It is part of a process that increases performance.
Think of an engine as a glorified air pump. If it's pumping air fine, there is no need to change anything. But if you make changes to get more air out (a performance exhaust) then you have to get more air in too (an air filter that flows more freely). If your air pump is moving more air, then you have to get more fuel to it so that the mixture won't be lean.
Now, if you have an aftermarket exhaust and air filter, or someone has been screwing around with the jetting and has gotten out of wack, then OK. You need to re-jet.
Keep in mind that jetting is effected by atmospheric conditions. Things like altitude, humidity, and temperature can and does effect the jetting and the way an engine runs. A good, and extreme example is what works at a coastal area ain't gonna be worth a hoot in Denver. The air is less dense at altitude, so bigger jets are needed to get more of the thin atmosphere in the mixture than you would need at sea level.
Now, if you still think you need to do this, be aware of this. Dyno Jet uses their own numbering system on their jets. They are totally different than the numbering system used by Kiehin and the jets that are in your carb.
Because of that you have no choice but to utilize Dyno Jets tech sheets as a starting point. click on this link for info on how to contact Dyno Jet.
http://www.dynojet.com/jetkits/contact_support.aspx
Good luck!
2007-05-14 01:41:15 · answer #1 · answered by Nomad 4 · 0⤊ 0⤋
Installing a jet kit on a new engine is perfectly fine. Just break in the bike as the owners manual recommends.
2016-05-17 10:23:16 · answer #2 · answered by ? 4 · 0⤊ 0⤋
Send me an e-mail and include yours.
I'll send you a dynojet adjustment sheet.
It'll have dynojet's phone # on it.
You'll have to call them to make sure you have the correct kit and they'll tell you what parts to use.
2007-05-14 05:09:11 · answer #3 · answered by guardrailjim 7 · 0⤊ 0⤋
Take you carb off the bike, take the carb apart and rebuild it using the new jets as replacements for the old jets.
2007-05-13 16:58:43 · answer #4 · answered by david d 5 · 0⤊ 0⤋
You have to know how to take your carb off and take the old jet out and put the new one in....If you're keeping the stock exhaust there might be too much back pressure to run smoothly at all RPM
2007-05-13 15:15:56 · answer #5 · answered by Anonymous · 0⤊ 1⤋