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03-10-2005, 09:16 AM
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#31 (permalink) |
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:::Rookie Rider:::
Join Date: Mar 2005
Posts: 13
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I was wandering if anyone could let me know about where to start with a jet size. I cut out the baffles from my stock silencer as is posted in another forum. It is otherwise stock. I am at 1440 feet above sea level. Thanks in advance for the help. Also, thanks for having such a cool and useful site.
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03-10-2005, 09:32 AM
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#32 (permalink) |
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:::Rookie Rider:::
Join Date: Jun 2004
Posts: 42
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when I had a modded Stock Pipe on my 04 I ran a 150 MJ with the air box lid off. Ran really good but im around 150ft above sea level
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04 KFX "Mean Green" Rossier Engineering Pipe (The Best leaves The Rest) DJ Needle on 3rd Clip with a DJ 165 Main Twin Air filter with Air box Topless Pinewood,SC Elevation 153Ft above sea level |
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03-10-2005, 11:24 PM
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#34 (permalink) |
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:::Mini LT50 Rider:::
Join Date: Mar 2005
Posts: 58
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i was useing a 155 dyno jet main but top end started to bogg so i gess that i was to rich i went down to a 150 dyno jet main and i did'nt see the point in adjusting the rest as they seam very good any way what doyou think blaster
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ltz400 2004 atenna big bore drz yossi full k/n filter and filter box lid with 400ex intake um and ac skid plates and pro pegs+nerfs elka pro shocks 165 milki main needle on 4th pj 25 mikiuni fuel screw 3 turns out livermore california sea level to 3000 hills if you want a job done right do it yourself mash1up racing |
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03-12-2005, 09:21 PM
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#35 (permalink) | |
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:::Post Whore:::
Join Date: Jun 2003
Location: New York
Posts: 2,754
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Quote:
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I no longer have a quad  Wallkill, NY |
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03-12-2005, 09:24 PM
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#36 (permalink) | |
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:::Post Whore:::
Join Date: Jun 2003
Location: New York
Posts: 2,754
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Quote:
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I no longer have a quad Wallkill, NY |
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03-12-2005, 11:07 PM
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#37 (permalink) |
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:::Mini LT50 Rider:::
Join Date: Mar 2005
Posts: 58
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hay guys bike is running real good but for some reason today it bogged a litle in secornd gear balls out any surgestions plug looks good
150 main dyno stock needle stock pilot
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ltz400 2004 atenna big bore drz yossi full k/n filter and filter box lid with 400ex intake um and ac skid plates and pro pegs+nerfs elka pro shocks 165 milki main needle on 4th pj 25 mikiuni fuel screw 3 turns out livermore california sea level to 3000 hills if you want a job done right do it yourself mash1up racing |
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03-13-2005, 03:59 PM
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#38 (permalink) |
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:::Post Whore:::
Join Date: Jun 2003
Location: New York
Posts: 2,754
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Well for one, you SHOULD need a bigger pilot and an adjustable needle with those mods. But, some people have weird situations in which they don't need it. I would back down 1 size on the main. But I would strongly suggest that you at least get a 25 PJ and an adjustable needle. Also, you might want to mess with the A/F screw. Does it backfire at all when you let off the gas?
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I no longer have a quad Wallkill, NY |
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03-13-2005, 05:29 PM
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#39 (permalink) |
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:::Rookie Rider:::
Join Date: Mar 2005
Posts: 7
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O.K. i have read enough and felt confident enough to tear into my quad last night and here's the result. it's an 04' Z, yoshi comp. full exhaust, pro-flo kit, k&n filter with outerwear, k&n lid w/outerwear. i used a dyno-jet jet kit. i used their needle on the 3rd setting,dj 160 main, stock pilot and mixture screw at 3-1/2 turns out. It started instantly (which is a surprise because in stock form it was a w00ter to start this time of year), and after a thorough warm-up and a ride through all the gears (down the road and back) it seemed really good.
Here are a few questions: 1) on the diagram that blastermaster posted, is the starter jet also refered to as the pilot jet? if so mine is marked "60". i have seen several recommendations for a "25". can someone please explain this? 2) is the pilot screw also called the mixture screw? if so i beleive my stock setting was only 1/2 to 3/4 turn out. is that possible? 3) i'm not sure exactly how to describe this but when rolling down the road, accelerating through the gears, when i was in 3rd gear and "double clutched" trying to gain rpm's and dump the clutch it didn't respond the way i expected. is it because of the rev limiter or is my jetting not quite correct to get the optimal performance or what? 4) i may have had a very slight hint of backfire on decel. am i correct in assuming that this can be corrected with mixture screw adjustments. 5) i don't want to get to carried away with fine tuning right now because i'm in PA and in 4 weeks the bike and i will be in AZ where i will be trying to dial it to perfection. Thanx a hell of alot to blastermaster for all the diagrams (i ran in and back out several times while doing the project to check things out) and to everyone else for all the input! i am learning so much from this post!! :clap |
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03-14-2005, 02:47 PM
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#40 (permalink) |
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:::Rookie Rider:::
Join Date: Jun 2004
Posts: 42
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Sorry its taken me so long to reply but to anwser you question, Nope I ran my stock needle and my stock pilot with just a 150 main and it ran fine with the stock air filter and no lid , it doesnt even compare to my Rossier Engineering pipe (that thing rips) but it ran really good
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04 KFX "Mean Green" Rossier Engineering Pipe (The Best leaves The Rest) DJ Needle on 3rd Clip with a DJ 165 Main Twin Air filter with Air box Topless Pinewood,SC Elevation 153Ft above sea level |
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03-14-2005, 06:20 PM
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#41 (permalink) | |
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:::Post Whore:::
Join Date: Jun 2003
Location: New York
Posts: 2,754
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Quote:
1) No, the starter jet is NOT the pilot jet, they are completely different jets/terms. The Pilot jet as the diagram states controls 0(idle) - 1/4 throttle. The Starter jet which is labeled "60" on the jet controls how much gas is allowed in suring the starting process/warming up. So, as your quad is starting, the starter jet is allowing gas to flow through it. Once the quad has been started, the other jets take over from there. 2) Yes, I believe that is true. Some people call it a "pilot screw" and some call it the "Fuel" screw. It is NOT an "Air" screw. Those are only present on 2 stroke machines. Someone please correct me if I'm wrong on the whole Fuel/Pilot screw thing. 3) I'm not quite sure what you're asking here... I guess what you're saying is when trying to gain RPM's it stumbled? If this is the case, it was most likely the rev limiter since you had to clutch pulled in when revving it up. 4) Backfire is caused by lean jetting all-together. It could be the main jet, the pilot, or anything else. I would think that it's your pilot since that was the only thing that you left stock. Keep in mind, the pilot jet is NOT the same as the "fuel" screw. 5) Well, depending on the elevation of where you're staying and the conditions, you will most likely have to adjust the jetting. Who knows, you could get lucky and it could be spot-on! About the pilot jet... I would go up to a 25. Not many people run the stock pilot with those kinds of mods. I hope that I've answered most of your questions, if you have any more, just ask!
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I no longer have a quad Wallkill, NY |
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03-15-2005, 04:07 AM
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#42 (permalink) |
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:::Rookie Rider:::
Join Date: Mar 2005
Posts: 7
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thanx for the reply, there won't be much (if any) altitude change from pa to AZ but the temp will prolly be 50-60 degrees warmer. it runs really well right now but i think i am lean. so i'm going to leave it alone and see what happens when i get out there. i don't see the pilot jet listed in the pics. is it there or located somewhere else? thanx again, craig.
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03-15-2005, 09:25 PM
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#43 (permalink) |
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:::Mini LT50 Rider:::
Join Date: Mar 2005
Posts: 58
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blaster the story so far is that i live in california below 3000ft i bought a yosumura full exhaust system and k/n air filter and since this week i have had no lid on my air box and a 150 dj main jet the idel was good i took the bike out last weekend and all went well i and great exceleration through all gears and no back fires i did a plug drop and the plug was mildly sooty. this week my k/n air box lid turned up so i intall that and took the bike out to see if it was ok i live in a quiet town so i went around the block once as not to make to much noise and then did a plug drop this time my plug look more sooty than the last time and i was wondering why this would be i was expecting if anything that the bike would now be lean ans the plug looked so close last time if you was wondering yes the plug was cleaned before the last test run so looking at the facts i would say i need to drop the main jet a size. the k/n filter lid came with too jets one is a 155 and the other is a 160 they say that a stock bike no mods should use one of these above 3000ft the 160 this doe'nt seam to add up can you please help
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ltz400 2004 atenna big bore drz yossi full k/n filter and filter box lid with 400ex intake um and ac skid plates and pro pegs+nerfs elka pro shocks 165 milki main needle on 4th pj 25 mikiuni fuel screw 3 turns out livermore california sea level to 3000 hills if you want a job done right do it yourself mash1up racing |
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03-19-2005, 12:14 AM
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#44 (permalink) | |
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:::Post Whore:::
Join Date: Jun 2003
Location: New York
Posts: 2,754
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Quote:
Oops, didn't see your post! It doesn't have any info ont he other stuff because I havent had the time to add more to it.
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I no longer have a quad Wallkill, NY |
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03-20-2005, 10:24 AM
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#45 (permalink) | |
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:::Mini LT50 Rider:::
Join Date: Mar 2005
Posts: 58
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Quote:
__________________
ltz400 2004 atenna big bore drz yossi full k/n filter and filter box lid with 400ex intake um and ac skid plates and pro pegs+nerfs elka pro shocks 165 milki main needle on 4th pj 25 mikiuni fuel screw 3 turns out livermore california sea level to 3000 hills if you want a job done right do it yourself mash1up racing |
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