Tenere hesitates near 2000rpm
 

Hi guys, recently my bike is hesitating when i smoothly open throttle near 2000 rpm -maybe 1900-, a couple of times the bike stalled and i almost crashed. It happens in any gear but it critical in 1 or 2nd gear.

Not happening when i twist throttle hard but i cant do that in heavy traffic. Idle rpm is ok, and the bike has all its maintenance on rule. I guess that could be the TPS, but id like to hear your opinions as guys from the dealer did not find out what is going on.

Do you have a standard XT, no modifications?

It doesn't like being under 2,000 rpm anyway, it gets chuggy when being forced to climb through this band from idle.

I stalled it a few times in my first months but learned to keep the revs up when the clutch was in.


I would suggest checking the gap on your spark plug anyway, but think about modifying your XT with the 'O2' mod to smooth it out in low revs.

The bike has no mods and have never been stalling before although i know she does not like to be run on low revs. I never climb on low revs but getting out of the park lot had become a pain. I will check the spark plug but i believe there should be no need for external mods to make it run the right way.

Most always in that rev range you'll need to half-clutch it. That's how the big heavy underpowered mono works.

Consider adjusting your throttle cable, so she revs a bit higher. Higher revs is your friend.

More fuel and raise idle speed.:icon_exclaim:

It's difficult to say, but assuming you've checked all the obvious stuff (fresh fuel, clean air filter, decent correctly gapped plug etc.), then I guess it could be TPS related?

Is the problem rpm specific, or throttle position specific? If it is only at a particular engine speed then it could be a number of things, not least the ignition circuit - coil, plug, HT lead etc. (especially if it�s been damp recently). If it is related to the throttle position itself, then the TPS perhaps should be investigated further. You can get some idea of whether it is the TPS by seeing if it hesitates at higher rpm on a light/very light throttle (the same position as when it occurs at low speeds where you first noticed it).

You really need to get access to a diagnostic tool to check and set the TPS angle (%), but you can check the TPS voltage easily enough with a multimeter. The TPS voltage with the ignition on should be 0.63-0.73V (between the yellow and blue/black wires) with the throttle closed and in the idle position. If it isn�t in spec then you can adjust (rotate) the position of the TPS unit until it is.

You can also check whether the resistance changes across the TPS range from closed to fully open are smooth with no dips, spikes or dead areas. For this you will need to disconnect the TPS connector, set your multimeter to read resistance (K Ohm) and connect to the two outer terminals in the connector. The only actual figure given is the maximum resistance which should be 2-3K, but you should be able to move the throttle across its range and see that the resistance changes evenly and there are no dead areas.

However, I would stress that you should first confirm that the idle is around the 1500rpm mark and the fuel, spark plug and air filter are good. Rule out all the simple, cheap and easy to fix stuff first.