| Author | Message | ||
     Jak |
So I rushed home from work tonight to get a quick run in before I ran out of light and heat. I have 650 miles on the 12R now and have just started stretching the engine out a little after following a fairly strict break in period the first 500 or so. The last two miles of my run was in town stop light to stop light stuff and I was running in first gear for the majority of the time. At about 5000rpm I noticed a real jerking feeling. When I dropped to 4k-4.5k it was very smooth and then when I'd take it back up to the 5k range it would lurch forward a bit, drop back, lurch forward, etc. So is this normal? Is this break in stuff? Or should I be concerned? BTW, when I would start out in first and take it close to 6k+ and then continue on to 2nd and 3rd gears it was fine. This was when I would just crack the throttle wide open. The lurching happened during slow twist of the throttle gradually reaching to the 5K point. Help??? | ||
| Ponytail |
Try a different gas station. Shell 92 or 93 Oct. Other than that, these bikes were designed to be ridden hard. Once it's broken in, get used to abusing it. They don't like to be "babied". | ||
| Jak |
I honestly don't think there is a gas station anywhere near me that has over 91. I kind of doubt it would be an octane issue though. When you are riding backroad twisties that are fairly close together do you tend to stay in the upper rev range? Like 4.5Krpm and above? Coming off Jap bikes I'm still trying to figure out where I can go and what will cause damage. On my bro-in-laws 600RR which has a rev limit arond 15-16k rpm you can stay at 12k rpm all day long. So I would think I should be able to hang in the 5k range with no problem. Ye or Ne | ||
| Rageonthedl |
its not a good idea just to drive around in 1st @ 5K | ||
| Jasonxb12s |
Jak, You should be fine in the 5k range in the twisty stuff. I basically stay around 5k-6k in 3rd gear 80% of the time when I'm up in the twisties. I've got 13,000 miles clocked and have been beating the crap out of the engine since mile 45. No engine failure yet. | ||
| Jak |
Rageonthedl - I wasn't exactly driving just at 5k. It was more like a stop light to stop light deal where I started from complete stop and gradually made it to just over 5k where I noticed jumping/lurching and then I backed off because I was at the next stop light. | ||
| Cochise |
Does it seem like I'm following you around? Anyway, after you asked me yesterday, what RPM range I was in. I was in fourth gear most of the time. On 23, the one with the nice sweepers, I can comfortably ride 80+ in fifth gear with no problem, on 12, the one with the rubberneckers and the handicapped, I ride pretty much in 5th gear, also at aboot 65-75, I usually don't downshift unless I have to slow a ways down, when waiting to pass some clown on the double yellow motorcycle passing zones. | ||
| Jak |
Oh, I didn't realize double yellow was for motorcycles...or is that a Rogers deal. Next time your out riding take a look at your rpm's for me and let me know what your general range is. Oh yeah, if you happen to get a hold of one of the poker run maps or know that route let me know. It was 102 to 12 to 23.... | ||
| Fcbuell |
When I ride twisties here in Colorado, I'm not super agressive, still mostly a noob, but usually am in 3rd/4rth between 3k and 5k in the RPM range. I like the low range torque, and tend to roll the throttle on and off... and not shift too much. | ||
| M1combat |
I would take it out and run it in fifth at 3500 for a few minutes. See what that does. It's true that it's not a good idea to just cruise along in first at 5K (and I understand that's not exactly what you were doing) but keep in mind that the XB12 has a BOAT LOAD of torque. Even a little fluctuation in RPM will be noticeable. Keep in mind that the ECM will switch from closed to open loop at about 4500 so maybe your AFV isn't quite settled right so there's a "ledge" at that point in the fueling. | ||
| Jak |
Is that "not quite settled" as in it will eventually settle or as in I might need the shop to do some fine tuning? | ||
| Howieshotrods |
I tend to ride in the 3k-4.5k range most of the time, seems to be right there in the powerband, she doesn't seem to like to putt around much slower than that. | ||
| Fullpower |
JAK: maybe check your plug wires? see if one has come loose. make sure all the fuses are well seated, sometimes vibration at a specific rpm can "wiggle" test parts of the wiring harness, look for loose ground leads, fuses, etc. good luck. dean | ||
| Ralf |
Uhh, make sure you aren't running fuel with alcohol. Several of my vehicles don't like that. My 12R is broken in, doesn't seem to like anything below 2500, but from 3000 up, power is good. Be really careful around 4000 in first gear or you will be wheelie-ville. No warranty expressed or implied, your results may vary... Ralfy |
