| Author | Message | ||
     Cowboy |
Att. Fellow Bullers.....I own and ride a 2001 X1. I ride approx. 2500 miles a month in the summer mo. My bike has a very sweet spot from 70 to 80 MPH. below that it seems to labor. As SPEEDING TKs are getting out of hand ( I may loose my licenes) if things continue the way they are. I do not want to change my gearing any I like it the way it is. I need info on useing a milder cam and lowering my power curve approx 500 or 600 RPM. any info or thoughts would be appricated. | ||
| Darthane |
LOL...try 4th gear instead of 5th. | ||
| Jim_m |
I believe José Q put the standard sportster cams in his S3 for the increase in low and mid range... Sounds like a good plan, if you are willing to sacrifice the X1's top end for the M2's power characteristics. José, are you around to chime in? edited by blake on June 19, 2003 | ||
| José_quiñones |
I put in standard M2 cams, which I believe are just standard Sportster cams. It was a straight swap, no other parts were needed. The FI was backfiring and popping with the stock ecm, so I swapped to the Race ecm, much better, and now I'm playing with the number of discs on my Supertrap muffler to get it to "just right" I need to take it to a dyno to really nail it down. 10 disks seemed too rich, 15 was too lean so I'm at 13 disks right now. I lost the "switch" effect that the Lighting cams have when they come on at 5000 rpm up to redline, but I got a meatier midrange as a tradeoff. I rarely ride at 6800 rpm so I do not miss the extra HP on top. Like I said, I have never dynoed it, but it feels more like an M2 than an X1 which is what I wanted. | ||
| José_quiñones |
The easiest thing to do is what Darthane said, just run it in 4th gear and find the sweet spot with that gear, hopefully it will fall under the "legal" speed limit! | ||
| Jim_m |
I thought you had to swap something in the valve gear? | ||
| Cowboy |
Thanks fellows I dont know yet what I will do I know I need to do something. I will keep watching for a good ans........Perfect ans. is special speed limit for buells but I dont see that happening, so will keep looking. | ||
| Darthane |
Just as a side note: The only three Buells I've ridden are my P3, XB9R, and my buddy's M2. While the XB revs higher and the final gear ratios are different from the M2, the 'sweet spots' and their corresponding speeds seemed to line up about the same. Cruising in 4th gear on my 'bolt at ~4500rpms (where a XB likes to be) puts me right at 70mph, the legal limit on most freeways in MI. If I remember right, doing the same thing on his M2 runs 70mph at a little under 4000rpms (where an M2 likes to be). I have the same problem - if I'm in fifth gear the bike really wants to be doing 80-85, and as lenient and apathetic as most cops seem to be around here towards speeding, that's just not a good idea. If you're speed limits are even lower (55-60) try 3rd gear. An X1 lights up at higher revs than an M2, from what I understand, so your 3rd gear sweet spot might land you right in that area, with the added benefitof being able to both engine brake and accelerate hard in an emergency. My $0.02 Bryan | ||
| Spiderman |
>>>>>>doing the same thing on his M2 runs 70mph at a little under 4000rpms (where an M2 likes to be). LOL My M2 with the stock cams feels right at home at 100, not sure the RPM cause I don't have a tach. BUT 34 miles at 100mph and she loves every second. BUT I also am upgrading to the X1 cams in a few days so we will see how that works out. | ||
| Darthane |
BUT 34 miles at 100mph and she loves every second. <~~Spiderman Heh...until she blows another cylinder/piston. -=runs=-  edited by darthane on June 19, 2003 | ||
| Blake |
Darthane, I think your ratios are off quite a bit. A simple way to recall RPM versus speed for top gear is to ratio your speed versus redline (7,500 rpm) and the bike's top speed. The XB9's have a theoretical (at redline in 5th gear) top speed of around 130 mph right? So take 70(7,500/130)=4,038 rpm. So an XB9's tach should show ~4,000 rpm at 70 mph, while a domestic tube framer will be right at 3,400 rpm. | ||
| Blake |
Jim_m, The valvetrain parts are the same except for the cams. Really.  | ||
| Darthane |
I was talking 4th gear, Blake. In fifth my speedo shows 75mph at 4000rpms, and a little over 80 at 4500 (however, I've been informed, and am inclined to believe, that the XB9R's speedo is roughly 5mph fast with Dunlops on it). Drop the tuber to 4th as well and it should bring the revs up closer to 4000 - but you're the person to answer that, since as far as the M2 goes I'm working from memory dating back to September of last year. | ||
| Newfie_buell |
I think Blake the mathematician is correct. My S1 seems to be quite happy at 120 with the revs just short of 4000rpm Of course thats Kilometers per hour. Up here in Canada we can go faster. | ||
| Blackbelt |
Hay cowboy, here is a quick thought. See that big White gauge to the right of the Tach, that is what we like to call the Speedometer. It tells ya how fast you are going, now those big White signs along the E-way and other roads with the Big Black numbers, those are the speedlimits. If you match your number on your "Speedometer" with the number on the "Speedlimit" you should be fine with the tickets.  I know, I am a smart ass... hehehehe fun though | ||
| Cowboy |
I know I know but I live on state line Tex----La. Tex Is no problem any thing below 80 seems to be ok (limit is 70)but The M Fs in La. will climb all over your ass above 55. IAm not a fast rider I will only opull up to 100 mph once a day only to check every thing out.Then it is back to 80, I just want the best for my bike.I hate the thought of running for 50 mi. in 4th gear I also hate to lug my motor for I know that is the worst thing you can do.Just looking for a way to cruise at 60 with out shakeing my ass off. T | ||
| Blackbelt |
makes sense... i have a 72 mile commute one way every day to work... i cruise at around 80-85, at about 4000-4200 RPM's, so i know the feeling | ||
| Blake |
Oops, missed the reference to 4th gear. Sorry about that. I cannot recall for certain the top speed of the XB9's, maybe it is 135mph. That would put the 5th revs at 7500/135*70=3,880 rpm. In 4th the domestic tubers will pull ~120 mph at 6,800 rpm so at 70 mph they should see around 3,967 rpm, so you are right on. | ||
| Darthane |
so you are right on. <~~Blake Woohoo!  |
