| Author | Message | ||
     Mr_stabby |
i finaly got my 2002 x1 lightning home on tuesday the 170 miles home were without incident thank god .. the only prob is the fueling below 3000 rpm its rough the bike it 100% stock would a less restrictive exhaust help with the prob as this is the only prob i can find with thumper cheers chris | ||
| Oldog |
Run a tank or 2 of gas through it a free flow exhaust may lead to excessive leaning making the potential problems worse, your first purchase should be a shop manual. also determine that the battery is ok and not getting weak ( dieing ) the FI bikes are electric dependent. Oh and BTW Welcome to the MADNESS! (Message edited by ol-dog on March 06, 2008) | ||
| Scott_in_nh |
Assuming everything is in order mechanically and electrically, you either need the race ecm and a TPS reset (quick and easy) to get the fueling close or start playing with ECMSPY to get the fueling right (more learning involved). Since you will need to reset the TPS anyway and unless you have somebody nearby that can do it for you, you will need ECMSPY either way. +1 on the shop manual before you do anything else. Also use the search feature here (search under "race ecm" and "ecm spy" to start) and start reading! | ||
| Limitedx1 |
my X1 with force pipe and race ecm does not run worth a damn below 3000 rpm. dyno shows that the power reallt kicks in about 4k. anytime you wanna pick it up on the highway ust click it down one and hang on! X1's with big cams high compression and thnderstorm heads wont make low end power, they werent designed for that. a bigger guru than myself can explain it better, but the x1 is pretty much built like a drag car, not 100% street functional but damn fun in the top rpm's | ||
| Scott_in_nh |
I agree with your comments on the power curve, but my bike does not run "rough" at any rpm. You make a good point so I guess we should ask Mr_stabby what he means by rough? | ||
| Mr_stabby |
she is a bit stuttery and feels a bit fluffy if it makes sence but once clear of 3000 she takes off good and propper is this any clearer | ||
| Chasespeed |
Since his bike is stock, I am going to ASSUME he means the below 3k stumble, miss, hiccup, cough, b/s these things did stock... and, with the aftermarket can, it will stumble a little more... The Race ECM solves that .. The race ecm and a set of NGK DPR 9EA9 plugs.. I am currently running 8EA9s right now.. as getting a bit of detonation with the 9EA9s.. Mine pulls pretty good from about 2500 up... and comes ALIVE at about 3800ish... and pulls like a freaking animal all the way to the rev limiter... Chase | ||
| Mr_stabby |
what he said..  | ||
| Natexlh1000 |
Before you do anything at all to it, run a couple of tanks of gas through it. It would suck to "fix" it only to find that there was nothing wrong with it except for stale gas. | ||
| Akbuell |
Without knowing how many miles are on the bike, and whether or not it has been sitting for a while, I second the motion to put 2-3 more tanks of gas through her. Maybe a bit of fuel injector cleaner? Confirm that the plugs are OK, and then go for a TPS reset. That should take care of it. And get the shop manual. More than worth the money. Welcome, and enjoy!!!! Dave | ||
| Scott_in_nh |
I am currently running 8EA9s right now.. as getting a bit of detonation with the 9EA9s.. did you get those reversed? the 8 is a hotter plug  http://www.kaila.net/tl125/tl125ngkcode.html | ||
| Chasespeed |
did you get those reversed? the 8 is a hotter plug Yeah, got the numbers reversed in my head... I STARTED with a 8EA 9EA was on the 1203.. and now on the 1250(still have a HINT of detonation in high ambient temps, under heavy load)... Sorry about that.. sometimes the fingers work while the mind doesnt... Chase | ||
| Mr_stabby |
sorry she has just had her 10000 mile service not sure how long she has sat tho .. i am planning to put a loud can on her and a freer flowing air filter later on but just want to get her right for the time being cheers for the advice so far folks | ||
| Bluzm2 |
Do the easy/cheap stuff first. Replace the intake seals AND the O-rings on the injectors. On an older Buell, this is the first place to start if they have not been replaced recently. If you have the stock ECM, the race version and a TPS reset WILL make a huge difference. As others said, there are maps available using the magic of ECMSPY that will also fix things up. A race ECM will set you back around $150 - 200 if you find one used. I know Al at American Sport Bike has them in stock but I don't remember the price. Give him a call anyway, he is a veritable fountain of knowledge. Brad | ||
| Jos51700 |
ALL of you with driveability issues below 3000 RPM..... Set your cam position sensor (ignition) timing, to perfection. Easier, and cheaper, than intake seals and all that stuff. (Diagnosis, anyone? Let's not fix what is not broken) Make it right, by the factory specs, before you assume something mechanical is wrong. I'm betting the proper timing will eliminate the 3K stumble blues, as it has for thousands of Buells before you. | ||
| Jos51700 |
"the only prob is the fueling below 3000 rpm its rough the bike it 100% stock would a less restrictive exhaust help with the prob as this is the only prob i can find with thumper" That will only make things worse with the Buell Digital Dynamic Fuel Injection your bike uses. | ||
| Jos51700 |
"X1's with big cams high compression and thnderstorm heads wont make low end power, they werent designed for that. a bigger guru than myself can explain it better, but the x1 is pretty much built like a drag car, not 100% street functional but damn fun in the top rpm's" I disagree. Properly tuned X1's make good power at all RPM levels. A UJM this is not. And a stock ECM and stock Buell plugs work just fine on stock Buells. | ||
| Rellim51 |
Why would you have the revs under 3000 anyways? Aside from when I am taking off from a stop, I almost never cruise at anything lower than 3000. I also have the Force pipe and race ECM and at a constant speed, it runs good under 3000 but it stumbles when put under any kind of load or trying to accelerate. It's just the nature of the beast. | ||
| Brokeneck |
Is it just sporty thumping under 3000 rpm? My S3 runs like the sportster it is based on until exactly 3000 rpm when it comes off the cam and everything becomes one with the universe -- these bikes are much closer related to a 69 Chevelle with a full grind Isky cam then they are an XKE with DOHC -- | ||
| Djkaplan |
My M2 is more like an Oldsmobile Vista Cruiser stationwagon... | ||
| Cheddarheads4erik |
My M2 is more like an Oldsmobile Vista Cruiser stationwagon... Duuude, I HAD a '76 VC StationWagon, with the Centenial Owner's Manual and all. That was the best GM product I ever had! I'm looking forward to doing some tuning on our new to us '01 S3T. Thanks again Andy! | ||
| Jos51700 |
"Is it just sporty thumping under 3000 rpm? My S3 runs like the sportster it is based on until exactly 3000 rpm when it comes off the cam" I think the phrase normally used is "comes on the cam. Personally, I think the cam has little to do with the smoothing out at 3000RPM. I think it's more about harmonious frequencies and rubber mounts.... (Message edited by jos51700 on March 07, 2008) | ||
| Bluzm2 |
Jos, Gotta beg to differ with you. A stock X1 or S3 never ran right with the stock ECM. The 99's were particularly bad. Plain and simple, too lean especially at low RPM's. You should see the A\F curve with the stock ECM vs the race ECM. Aaron's dyno charts are probably still in the archives somewhere. The stocker isn't even close to stoichiometric. That's why the stumble so much. A race ECM changes the driveability dramatically. | ||
| Iamike |
Ditto the race ECM (it says on the side "For Race Only"), check for the boot on the little brass tube at the bottom of the throttle body and zero the TPS. Made a huge difference on my '99 at low RPMs. Go ahead and set the cam position too. They run pretty good when all is set right. | ||
| Brokeneck |
If you'd rather come ON the cam that's fine with me -- race ecm with better intake and exhaust definitely helps drivabilty big HP and rev gains but still thumps below 3000 rpm. | ||
| Raceautobody |
Mr_stabby http://www.saintjohn.nbcc.nb.ca/Marriott/x1/ This is a very site with alot of info on our beloved X1s. | ||
| Jos51700 |
"A stock X1 or S3 never ran right with the stock ECM. The 99's were particularly bad." They ran fine '99 after the timing was set! "Plain and simple, too lean especially at low RPM's. You should see the A\F curve with the stock ECM vs the race ECM. Aaron's dyno charts are probably still in the archives somewhere. The stocker isn't even close to stoichiometric. That's why the stumble so much." Set the timing! (I've seen a few dyno runs, both before and after the timing is set. Properly set up, these bikes are not too lean.) "A race ECM changes the driveability dramatically." This is true, but they just don't run perfect unless you've installed all the race kit goodies. I like the tuning options that are becoming available. To each his/her own, but I know what I've seen with my own eyes, and that's good enough to be fact for me. | ||
| Bluzm2 |
Jos, You know that flat spot abouty 2700- 3200 RPM on a stocker? It's COMPLETELY gone with a race ECM due to the richer mix in the low-midrange. The stock ECM IS lean due to EPA regulations. That's why the Race ECM is marked "For Race Only". As far as installing the "race kit goodies" the pipe and intake isn't needed to have a huge improvment. The race ECM is dollar for dollar the best investment for an old tuber fuelie. (That and a TPS reset and a quick check on the cam position sensor..) BTW, a dyno run without a broadband sniffer cannot tell you if you are lean or rich only that you are getting the best you can with the existing components and settings. | ||
| Rellim51 |
Actually, it's called wide band not broad band. | ||
| Bluzm2 |
Sorry about that, I was working network support issues all afternoon. Had a remote VPN user with problems. Must have had boradband on the brain.. I hate being on call... Brad | ||
| Rellim51 |
I was just giving you a hard time  | ||
| Oldog |
I second the ECM for an up grade I have one it makes a huge difference in the whay the motor runs. The X1 with a force winder, super trapp and stock cams with the factory ECM makes ~85 RWHP I have not tested the race ecm yet the power delivery is smooth with a creshendo coming on at about 3500 rpm at 5500 rpm your arms are comming out of the socket, low rpm flatspot is fixed with the race ecm missing / back firing at low revs are some thing else especialy losing one jug. AGAIN BEFORE messing with the bike run a couple of tanks of gas through it, ( moderatly ) Get a shop manual check the plugs soon, >> intake seals on a 7 year old bike are a good idea they are basiclay shot at 3 years IMO, << checking the timing is a good idea though it should not move, Tps reset good idea. check all sensors spend some time in the KV and eliminate the easy stuff first. |
