It’s another exciting day at Randy’s Garage… the arrival of another package from my favorite Triumph Bonneville high performance after-market supplier, Bonneville Performance!


There is excitement at Randy’s Garage when packages with this logo arrive!

Inside this little package is the Bonneville Performance Oil Pressure Gauge Kit!

BP Oil Gauge Kit parts unwrapped, and installation instructions.

BP Oil Gauge Kit parts unwrapped, and installation instructions.

Here is a closer look at the unwrapped parts.


Oil Pressure Gauge Kit – Parts

I ordered mine with a black face (no surprise there!)… it also comes in white. Interestingly enough the gauge is a “Marshall” – the name of my third son!

I plan to install this kit tonight! I’ll keep you posted on how that goes!

BP Oil Pressure Gauge Kit Installation Update

With the Bonnie safely raised on a floor jack, I removed my seat, side covers, gas tank and carbs to give me ample room to work.


Getting ready to remove carbs.


Carbs removed, revealing access to existing oil pressure switch and hose.

Next, I loosened and removed the stock banjo bolt and crush washers.


Banjo bolt and crush washers

I carefully cleaned the area around the hole on top of the crank case.


Banjo bolt and crush washers removed.

Following the Bonneville Performance instructions, I stacked the new crush washers and fittings from bottom to top as follows: new crush washer, OEM hose banjo fitting, new crush washer, BP kit banjo fitting, new crush washer.


Stacked fittings

Through the center of this stack I inserted the new hex head banjo bolt supplied by Bonneville performance, and hand tightened it.
Following this I removed the two engine case bolts where the oil pressure gauge bracket mounts. I used an 8mm socket wrench.


Engine case bolts

The new bracket is mounted on these two holes with new, slightly longer stainless steel 5mm hex head cap screws and washers. I hand tightened them at this point.


Hand mounted oil-pressure gauge and bracket.

Next, I connected the supplied new hose from the banjo fitting on the crank case, to the fitting on the back of the gauge. I used some Teflon tape on the threads, and hand tightened only.


Inspecting the fit with hand-tightened fittings.

I now made sure everything fit well with no kinks or misaligned parts. Everything looked good so I tightened down each fitting as directed in the instructions, being careful not to over-tighten.

I re-installed the carbs and gas tank, and then fired up the engine.


Checking for leaks – none!

Once I determined that there were no leaks, I installed my air cleaners, seat and side covers.

The new Bonneville Performance Oil Pressure Gauge registers in the 20-30 lbs. range at low idle (1,200 RPM), and jumps up to around 80 lbs. at 2,000 RPM. I love the look of the liquid filled black face and feel more confident now with the knowledge of exactly what my oil pressure is doing!