| Author | Message | ||
     Colin |
My dealer recently fiited an upgrade kit to my UK 99 M2. It involved replacing the ignition module, carb float bowl and fitting a temperature sensor to the rear cylinder. The result was that I lost the top end power and the bike wouldn't pull more than 95 in top - it was good for 120+ prior to the refit. After some discussion, he refittd the old ignition module and the bike performed properly again. I believe that the mod is to stop the engine from blowing up - this is my impression - the dealer wasn't too specific. I now appear to be left with a choice - fast exploding bike or slow safe one. Has anyone else had this experience? Any thoughts gratefully accepted.  | ||
| Sarodude |
TOTAL SHOT IN THE DARK... The upgraded ignition has the head temp sensor to keep your motor being unhappy in extreme conditions, right? The only 'Brains' your M2 has are in the ignition. PERHAPS there's something wrong with the sensor or wiring harness that's causing an 'always hot' signal to be sent to the ignition module and the resultant retarded ignition. I don't have an M2. This is merely a guess at what may be happening... -Saro | ||
| Spiderman |
What is the exact reason the dealer put this "up grade kit" on for. I have a 00 M2 without all the bells and wistels and mine has never "blown up" or even atempt to. I would also check your intake manifold, if there is a leak that will keep the top end power down. Just shoot carb cleaner at all the joints, if she stals thats your problem. | ||
| Blake |
The head temp sensor added to M2's is to protect against overheating. When the sensor reached teh critical temperature (reported as voltage to module) the ignition is shut down on every other power stroke. Sounds like as Saro says, your sensor was reporting the hot voltage all the time. There should be no other difference in modules other than the head sensor circuitry. I was told that Buell implemented the overheat protection in response to some incidents of prolonged high speed summer touring, like on the Autobahn, that resulted in some heat related problems. I took max temperatures at the track a few weeks ago. Ambient temperature was in the 80's. Rear head at exahust port was 459F. The rear rockerbox was around 325F. Good synthetic oil my friends. If you are not running it and are running hard on hot days... you ARE cooking your oil. | ||
| Colin |
Many thanks for your thoughts. My (standard) air box is continually working loose so I 'll do the air leak check as a matter of course and talk again to my dealer. | ||
| Colin |
Conclusion - for anyone who may be experiencing the same problem, my dealer eventually fitted a second black box. This one works. The result is more predictable power delivery and less coughing at low revs. It feels like a lot of the flat spots in the original curve have been eliminated. The best just got better! Cheers! Colin |
