| Author | Message | ||
     Bertotti |
Well i want to smooth the low end out. Mainly for running more evenly at slower speeds. I have read about the xb9 primary swap and some references to the race ecm helping this situation. live in SD. I have seen the average speed and the interstates here running better then 80 before. 85 isn't uncommon but you will get ticketed for it. I do not need to go faster then 90. I would just as soon keep my license. Which in your opinions is the best approach for my desires and considering the info I gave. I have a stock pipe and unless I modify it myself i will not be changing it. I've given up on contacting special ops. | ||
| Cavi |
with the stock pipe I do not see you using the race ecm, plus you would have to lock open the exhaust valve. I have the XB9 gearing and I love it, and please do not believe too much negative you hear about it. The bike will still do 110 if needed, it will just get there faster. I like it much better. I personally feel that this engine pulls much better on the top half of the rpm range and the XB9 kit lets you use that range more efficiently. The only real negative is that gas milage will drop slightly, I get tipically 46 to 48 max. But I do have the race pipe and ecm which might also account for part of that | ||
| Bertotti |
What exactly did you change for the xb9 gearing? Does it perform at slower speed the way i am hoping? Thanks for the help. | ||
| Windrider |
Betotti, The XB9 gearing kit changes the primary sprocket and chain to change the crank to transmission ratio. | ||
| Bertotti |
Would changing the rear belt pulley be a better alternative? | ||
| Windrider |
That would be nearly impossible since the drive belt is only made in one size with one tooth count. The easiest place to modify the ratio is at the primary on a belt driven Buell motorcycle. | ||
| Bertotti |
Ah now that you put it that way it makes perfect sense. Thanks | ||
| Orangeulius |
Bertotti, it may be a preference thing. I can tell you that my race ECM really smoothed the low end out on my 06. I also added the race muffler. | ||
| Bertotti |
I was wondering about the race ecm but I have no intention of trying to get a race muffler. I would be willing to reflash my stock ecm but to what I don't know. Obviously I am house bound this evening so I have been responding quickly. Maybe I should shut down the mac and go practice my guitar or mandolin. I am addicted to this place. Thanks | ||
| Cityxslicker |
Maybe if I played the guitar I would be on here less ;) Riding the CityX she runs nice down the trails, and the loud pipe does wonders to scare up deer. I would like first to be a little lower for some for the more techinical trails, and while were at it, a tall 6th gear for running down the highway . | ||
| Bertotti |
I will do the change if I can comfortably cruise at 90. I will need that ability here in the Dakota where even though the speed limit is 75 you will get passed all day long if you aren't a little over 80. I don't need to go any faster and would prefer the bike run better at ruffer terrain and slower speeds. I am still thinking of lowering a bit but I'm not ready to do that yet. I think the xb9 change and some lights and even the 08 front end are at the top of my list right now. I won't need to do much night riding for awhile so of the three it is last. I'm still deciding on which to do first though. XB9 primary swap or 08 front end? Anyone know what parts are needed for the swap of the front end? | ||
| Chrisb |
Do the primary | ||
| Packdog |
Hey Orangeulius, Did you do the race ECM and pipe at the same time, or did you have a chance to try the race ECM with the stock pipe? If you had a chance to experience the race ECM with the stock pipe wired open, what was your impression? I need to keep the quietness of the stock pipe, but would like to smooth out the bottom end a bit. | ||
| Gotj |
Packdog, When I put on the 07 air cleaner cover, it smoothed out the lower rpms so that I could ease out the clutch at idle on level ground and it would pull without lurching. You may get a similar effect by drilling out your 06 airbox. I just paid the $35 or so and swapped them. Bertotti, The XB9 primary would not do anything to smooth that out. | ||
| Bertotti |
I can honestly say since i hit about 2K miles the low end surge has let up a bit. I do still have some surge but not nearly as bad as it was a month ago. I am going to do the primary, mod the underseat area and add lights all in a few months when I can't ride anymore for bad winter weather. | ||
| Dfishman |
About how much $$ to do the primary change? | ||
| Bertotti |
American sport bike is just under 200 $. I think. | ||
| L_je |
Bertotti, Maybe this question has been addressed, but I'm too lazy to do the research, but why do you need better low-end controllability? Traffic? Surely there can't be any traffic in SD. Personally, I always seem to find myself coming out of corners at 5+krpm in suburbia. Wouldn't this change raise that to 6+krpm? Raising the gearing would greatly impact my terror campaign against the cell-phone-talking, coffe-drinking and kid-slapping obliviots that seem to crowd the roads here in suburban ATL. I just got back from a 6 hour ride in N GA. There was about a 100 mile section where I don't think I left 3rd gear more than 6 times, and that includes 3 stop signs. This change would certainly affect my love affair with 3rd gear. The 9s rev about 1000 rpm higher, which allows the shifting patterns between the 9s and 12s to be pretty similar. If you put the 9 primary on your 12, I would think you'd end up shifting sooner, and more often, no? | ||
| Bertotti |
I want better low end control off road and from a dead stop. Riding around town I never really get out of 2nd sometimes third. I understand it would lower first gear and all the others would drop to around where the one before was. 4th for instance would be closer to third. etc. I don't rev I keep it around 3k to 3.5k. I may be making a mistake but I think this will give me what I want and that is a lower first gear. I wish it was a six speed just for this reason. I find this fifth is plenty tall and I can do most of my riding in fourth on the road it just revs a bit higher. I would be interested to see what the actual final gearing is after the kit just for comparisons sake. I can always switch back if I don't like it. I am sure I could get some of my money back out of it especially if I did the install for someone else. | ||
| Gotj |
Bertotti, Your stock fourth gear is almost identical to what fifth gear would be with the XB9 primary. It's not anything like a 1000 rpm increase. Just ignore fifth gear for a while to simulate what highway riding would be like with the mod. | ||
| Bertotti |
I am going riding in just a few minutes. Thanks | ||
| Chrisb |
Bertotti, From what you've said in your last post, I'm fairly certain you will enjoy the XB9 primary mod. I've been thinking about doing the mod myself. With my size and weight 5th is only useful above 70mph. I rarely use 5th unless I'm on I-95 rolling at 80mph just to stay in the flow of traffic and not be a sitting duck. | ||
| Bertotti |
That is my hold up. Even though I want the better lower 1st gear I do spend the majority of my time on rides on an interstate that averages is at least running 80mph. 90 for extended periods as in 4 or five hours is an ability I have to have also. I wonder if I could come up with a two speed primary. Like a high and low gear box. | ||
| Cavi |
the XB9 primary will do fine with 80 and 90. To get an idea of how it will be drive for a day in 4th instead of 5th, that is about it. As for the lower speeds it is fantastic much smoother, also way better acceleration, much more solid feeling | ||
| Doncasto |
Ever since my first ride on my '07 Uly in traffic I have found the gearing to be too tall. In situations below 20 mph, I was spending way to much of my time clutching in to keep from stalling, and when leaving a traffic light behind other traffic I invariably had to pull in the clutch to keep from hitting the bumpers in front of me. The ultimate test of the gearing came during a Uly trip from Boulder to Dana Point, Ca and back. At freeway speeds I was able to remain in 5th gear for extended periods of time . . .and got pretty good fuel mileage (48-55 mpg) as a result. However, passing in 5th was frustratingly slow . . .and after a time I found downshifting, even at 70 mph+ . . .allowed me to get around slower traffic in a much safer manner. When I got back the first project on the list was the XB9 primary change out. Although I have not had the chance for a direct comparison (not planning on going through the desert to SCal again anytime soon), the problems with clutching and passing here locally have gone away. There may be some correlation to both of these "issues" having to do with my "rider load" . . .I cannot recall even weighing less than 230 lbs in this lifetime. Although I had thought being at sea level in California vrs "mile high" here might have had some influence, my riding in California showed little discernible change even with the "more air there" working for me. I have done a little gravel road driving since the change and find some small advantage to lower gearing there, but nothing worth doing the change out by itself. I wholeheartedly recommend the gearing change to anyone having the same "issues" I was. YMMV . . .and slimmer riders may need to assimilate this information with a grain of salt. | ||
| Bertotti |
I am a smaller guy. 5'8" 175lbs. I guess it sounds to good to be true. I think it sounds to good to be true what is the hidden sacrifice? Miles per gallon suffers a bit but it doesn't sound to bad, no worse then my break in MPG. I am ordering the kit tomorrow from American Sport Bike. Thanks all Oh will I void my warranty doing this? I suppose I could always put the old gearing back in if needed. I don't plan on using them for service anymore unless it is a major warranty issue. They are a good store, I'm just cheap. Hey I just noticed I typed in A>S>B and the system spelled it out and linked it. I love computer magic. (Message edited by Bertotti on August 12, 2007) | ||
| Cavi |
first off, they are stock harley parts and really do not affect much that could fail due to the mod, second I personally doubt that any dealer would know that you swapped the gearing. Keep in mind most of them spend 90% of their time working on Hogs not sportbikes. |
