marina

21 months ago

 - via web

- Story

Losing Power on the Triumph Street Triple

Toronto, Ontario, Canada

Recently, when out riding my Street Triple 675, aka Peaches, the mysterious engine light turned on for the first time in 10 years. Yes it's true.

"Peaches", I asked, "what's up baby?" and rubbed her tank with love. She replied with nothing, but the engine light turned off after an hour or so of riding, so I thought she must be self-healing. Then a few days later, I was riding on a busy highway in 6th gear--it was a smoking hot day and boom! All power was lost. The RPMs dropped very hard. I shifted down to get some acceleration; nothing.

Shifted down to 4th; nothing. More downshifts and still no power. Luckily I was on a calm stretch of road with few cars on it so I coasted over to the gravel shoulder with the engine running as if in neutral. I turned the engine off. Then after a few minutes, I switched it back on and started her up. Peaches was up and running! But the engine light was back on like an ominous visitor at sunset. I continued riding but kept her out of 6th gear, just in case.

Strange one. 

Once home, after about 500kms of worry-riding, I did some investigating and it a few things came up… 

  • Maybe it was due to running a lower grade of gas, I did lose power after filling up on some cheaper gas
  • Maybe the root cause was due to overfilling the gas tank and creating some kind of a vacuum that causes the ECU to freak out
  • Or maybe I needed to get the code read?!

I booked an hour at Studio Cycle, my local motorcycle shop, to hook up Peaches and have Diego read the codes for me. It was the barometric pressure sensor that needed to be checked out and cleaned (what else can you do?). It was not easy to find. It's situated on the left hand side at the front of the rear mudguard beneath the seat. The barometric pressure sensor measures atmospheric air pressure. With this information the right amount of fuel per injection is adjusted to suit the current air pressure. Loss of power had something to do with not reading the current air pressure correctly. It's a bit of a mystery.

Nothing like a good garage shot, here's Peaches at Studio Cycle

Nothing like a good garage shot, here's Peaches at Studio Cycle

The barometric pressure sensor is hard to find... it's not under the gas tank

The barometric pressure sensor is hard to find... it's not under the gas tank

Here it is, the Triumph Street Triple barometric pressure sensor, all cleaned up and working fine

Here it is, the Triumph Street Triple barometric pressure sensor, all cleaned up and working fine

Back to riding the backroads, I had to stay on the major highways just in case something went wrong

Back to riding the backroads, I had to stay on the major highways just in case something went wrong

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Dogger

20 months ago

Are you going to check out the deer trail or the 129 north if thessalon?! Nice roads!

Patou19

20 months ago

where in Northern Ontario? Like Barrie? lol I grew up in Cochrane. watch for Moose and friends.. Safe Riding. 👍

marina

20 months ago

@SATurner  @Patou19  @Teramuto  @JRbiker Hey guys, thanks for the feedback. I'll be out riding in northern Ontario this weekend and will report back. 🤟

SATurner

20 months ago

Oof! Who knew motorcycles had barometric pressure gauges? I didn't until now.

Here's hoping you and Peaches are out after it again soon. Stay safe. 🙂

Patou19

20 months ago

Nice. Glad you got it figured out. Thanks for the cute story "Studio" is a fitting name for that shop. "Operating Theater " would work too. 👍

Teramuto

21 months ago

Nice. Glad it's fixed. Tho you wouldn't have that problem of you were running a carburetor. 😇

JRbiker

21 months ago

Sometimes the pressure gets to all of us!

marina

21 months ago

@teramuto some garage shots for you!