| Author | Message | ||
     Blake |
Thanks for letting us know your findings. Glad you were able to get the problem diagnosed. I guess we should eliminate water from the diagnostic drawer of tools. | ||
| Richieg150 |
Finally got the Mikuni on my 2000 M2,close.I have ended up so far with a 157.5 main jet,20 pilot jet,air screw out 1-3/4 turns and a 97 needle up 1 notch from the middle.I took it to a local dealer and run it on their dyno.The results were-79 degrees,980 ft.,max torque-81.3,max power-92.1. | ||
| Blake |
Richie, They didn't give you SAE factored results? Did the dyno include an A/F meter? | ||
| Richieg150 |
Blake,no they didnt give me SAE factored results and NO they dont have an A/F meter on their dyno.I wish they had the A/F meter so I could really dial it in,but the 2 dynos in our area neither have the A/F meters.Thought about buying one,read of one on here for about 400$,but I figure if I can buy one so can the local dealers! | ||
| Richieg150 |
Blake im running Nallins Millineun cylinders and pistons,my stock heads,SE1 cams,V&H slipon exhaust,Mikuni carb.I am eventually going to get Nallins stage 3 heads and race exhaust.I changed my 27 tooth front for the 29.It was a great move,it was impossible to get aggressive with the throttle and keep the front end down in first,not wanting it to come up.The sprocket change was on Brian Nallins suggestion,the bike still will pull up in first,but now at 80 mph,im only turning about 3700rpm instead of 4000.The bike still pulls strong up to rev limiter in 5th. | ||
| S320002 |
Somebody here had a part number for a higher flow fuel injector that would fit the Buell manifold. I beleive it was from a Buick V6. If you could repost it I would appreciate it greatly. Also if anyone else out there has any input as far as higher flow injectors the insite would be appreciated. We are upgrading an X1 drag bike and would like to stay with injection. Thanks, Greg | ||
| Dynarider |
Started getting the dreaded carb cough with my dyna. If you rolled off the throttle & then gave it just a little gas it would sneeze thru the carb. Seemed like it was worse during cold weather. Played with the jets & really couldnt clear it all up. Have an EV27 cam & jets are set up with a 48 lowspeed & a 190 hi. Anyways figured out what the issue was, started playing around yesterday with my ignition & just for kicks swapped out the 6000 rpm screaming eagle box for my old 8000 rpm one. Yea yea I know the damn thing will never run that high, but anyways it is running fantastic, no cough at all. | ||
| Frank_Buell_Bro |
Help!  Ik heb nu een verse Buell met ff meer dan 2000 KM op de teller. Got a fresh X1 with 2000KM on the clock. Ik ben weer terug bij af wat het stotter probleem betreft. Back to where the S*** started concerning the stutter problem. Sommige hebben het op Croix zelf mogen horen en aanschouwen; rond de 5000RPM is het pet. You might mave heard it on the track at Croix. At 5000RPM and up it stutters like crazy. De mannen van HD Benelux kwamen er niet uit. HD Benelux couldn't find the solution. Wat moet ik doen? Met alle Buell kennis die hier rondzwerft moeten we er toch zelf wel uit kunnen komen?!? What should i do now? With all this Buell knowledge hangin around, we should be able to fix this ourselves?!? Wie heeft het zelfde ooit meegemaakt? Anyone had the same problems? Wat was de oplossing? What was the solution? Werkte die oplossing ook nog na een tijdje rijden? Did the problem stay away? gek wordt je ervan  Drives me crazy P.s. X1, make2000, Euro poelies, K&N airfilter, Scorpion muffler. | ||
| Blake |
Frank, That could be any number of things. DDFI (any of the sensors, TPS setting, cam position sensor setting, O2 sensor...), Ignition, Plug wirs, Spark Plugs... The most likely scenario I can imagine is related to the over temperature protection circuitry. Did your X1 get retrofitted or come originally with the new high temperature protection circuitry? You may have been running hot, and as a way to help the engine cool down, the circuitry kicked in to cause your engine to miss every other ignition cycle. Or maybe your sensor is faulty and erroneousy reported the threshold voltage to the ECM indicating a false high temperature condition. | ||
| Richieg150 |
Just found out something on my mikuni carb,my bike has not been able to idle smooth.I also notice on occassion,gas coming out of the overflow tube,when at a stop idleing.I decided to look at the float needle and it looked fine.A local harley mechanic told me to check the float level,it sounded to him like it may be too high.I did check the float level,and it was too high.The manual gives a measurement of 18mm,+- 2mm,from the bottom of the carb to the bottom of the float.I put it all back togeather,and my bike idles great.I let it idle for awhile,and had no gas coming out of the overflow tube.Maybe this may help someone with a similar problem.  | ||
| Aaron |
Every HSR42 I've ever owned does that at least sometimes  | ||
| Road_Thing |
I had a problem with my HSR42--always had fuel stains under it, but never saw it actually leak. I took it apart to check the float level and, lo and behold, it was missing about a 1/2" segment out of the back side of the float bowl gasket! New gasket = No leak. Easiest fix I ever did! r-t | ||
| Richieg150 |
AAron,so youre saying all the mikunies,will have gas dribbleing out of the overflow tubes occassionally?With no apparent cause of reason???HHHHHHHMMMMMMMMMMM OK!Didnt know that,thought maybe mine was messing up or something. | ||
| Jmartz |
Has anyone on the board ever tried the Edelbrock quicksilver? It looks like a great design to me. 1995 California models had them but I've never seen a posting by anyone with one. Not having been able to ever tune my CV 44 to perfection (within carburation limitiations) I have often wondered how the QS would perform. The needle design seems better, there is no butterfly valve at full bore and its size is not offensive. The newer ones (now these are big, ugly and wreak of "added on"  even have an accelerator pump although some seem to be quite pleased to operated their engines w/o one. jose | ||
| Aaron |
Yes, at least I've seen all of mine do that. | ||
| Gcpoland |
No carb, including the Mikuni should dribble gas at any time!! If you have gas comming out the overflow, something is wrong. Float is set to high, needle not seated correctly or the bike has been at an extreme lean angle. Most of the floats are set to high out of the box, which can cause dribble. Remember, do not turn it completely upside down to set the float hight. They will not dribble when working properly. Gary | ||
| Mikej |
Jose, I think Jim_SB has one on his S2, if I remember right. | ||
| Aaron |
Gary, it's not a case of the float level being set wrong, it's a case of something sticking. When I see it, I can generally make it stop by rapping on the carb with a screwdriver. I've seen brand new Mikuni's right out of the box do it. | ||
| Blake |
Yikes! I WAS thinking about saving my pennies for a new HSR42. | ||
| Aaron |
Oh, it's an occassional minor nuisance. No big deal. | ||
| Court |
Is the size/configuration of the screwdriver material in the procedure? | ||
| Gcpoland |
The needle has a coating on it that sometimes causes it to stick to the seat, which in turn causes it not to seal properly. Sometimes just wiping it with a rag cleans it up. The other problem I have seen is particles in the bowl. The filter screen is large enough to let some stuff pass through and collect in the bowl which can get under the needle causing it not to seal. You need the larger screen because of the gravity feed. The reason you don't see the same thing on a CV is that they do not use overflow lines. If the needle doesn't seat on a CV and you haven't turned off the petcock, you can fill the crankcase with fuel. That is one of the reasons you should turn off the petcock. The little dribble on the floor from a mikuni tells me something is wrong and it is time to correct it. Even if it is just dropping the bowl and cleaning out the debris that is in there. Most gas stations now, do a lousy job of screening out the fuel. Eventually those little particles clump together and can clog a jet and cause uneven running. I wouldn't want to guess how many times I chased driveability problems caused by crap in the bowl. Sometimes I out think myself instead of doing the basics first. Gary | ||
| Jmartz |
Thanks Mikej... cool! | ||
| Sarodude |
Curious... Especially given the recent discussions, why would someone run or not run a fuel filter? -Saro | ||
| Gcpoland |
Fuel filter is on top of the petcock in the tank. The filter screen has to be relatively coarse to alow the fuel to gravity feed fast enough to feed the carb. EFI units use a finer mesh in the screen because they use a pump. Never put a second filter in your fuel line because you will end up with a fuel starvation situation. Buy good quality fuel at a busy station and you shouldn't have any problems. Sorry if I confused anyone about the filter. Gary | ||
| X1glider |
Speaking of good fuel. Has anyone heard of the Fitch Fuel Catalyst? You put this thing in your gas tank and it does it's magic to the fuel. It doesn't add anything, just changes what is there. Part of me wants to believe it could work. The other part thinks it's snake oil. If it does what it claims by helping the fuel form ideal hydrocarbon chains for the best burn, I can only believe a carb could use it. I think an FI system would be confused as hell by the info an O2 sensor would send back to the ECM. "Hey the exhaust gases are really clean! This isn't normal! Adjust, adjust, adjust..." Sputter, surge, sputter, cough... | ||
| Blake |
I talked to some people at Fitch a few years ago. They are total snake oil hucksters. A catalyst is some compound that aids or accelerates a chemical reaction. I dunno what chemical reaction Fitch is claiming to aid in our fuel tanks. Something about transforming short chain fuel polymers into long chain polymers? Yeah right. Their claims are ridiculous. When I started asking some tough questions of their so called "technical" representative, like "Do you have any independent laboratory tests supporting your claims", and "What does your claim that the EPA has approved your product mean", I got threatened with a lawsuit. That told me all I needed to know. Time and time again the old addage is proved true... "If it sounds to good to be true, it probably is." | ||
| Jmartz |
Blake is right. Transforming the wide distribution of hydrocarbons gasoline is into some sort of more uniform molecular weight group is not possible w/o heat, chemisty and chromatography. A claim such as that is deceiving as best and an insult to someone with a rudimentary understanding of chemistry. Timing and its subsequent effect on power is related to the chemistry of the fuel. With gasoline being a mixture of hydrocarbons of different properties that varies within a narrow range, getting the engine to perform optimally is a bit difficult. I wonder if an engine runnig on pure Octane (or for that matter Hexane) would make more power. I love the increase in power realized by runnig a motor on pure Methyl alcohol. This substance burns far less complete than gasoline yet it produces 15%? more power with an astronomical increase in consumption. I'm sure the oxygen has something to do about it as well as the reaction rate. | ||
| Al_Lighton |
Blake, Just one more data point: My mikuni has never piddled on the ground, and I view it as the best performance item I've put on my S1W. I just like the way it feels, it's snappier/crisper. Al | ||
| Blake |
Al: I hear you. After riding a Mikuni fitted bike for the first time, I now understand what everyone is talking about when they say "improved throttle response". I had to learn how to launch in first gear all over again! |
