Triumph Bonneville (2001-2016): Review + Buying Guide

Why you want it:

What to look for:

The Bonneville’s engine is very under-stressed and major mechanical issues are few and far between as a result. Don’t bother looking for a sixth gear, there isn’t one, but do check the gearbox selects all the gears nice and smoothly as forums report there can be issues with the downshift on well-used bikes. As with any older bike, and especially air-cooled models, watch out for excessive smoke on start-up but in general the major items are solid on the Bonnie, it is the small details that let the parallel twin down. Or more precisely, its electrics…

Water is the Bonnie’s nemesis and the wiring loom can throw up a lot of gremlins if the bike is left outside and corrosion sets in. Owners report everything from miss-fires (generally the coils failing, so no big deal), to non-starting (switchgear failing) to the ground wires corroding and it all throwing in the towel. There is a wiring junction on the left-hand side of the tank that is most susceptible to faults and if you type in ‘wiring junction failure’ into a search engine, Triumphrat.net has a lot of posts on the issue! There are a few cases of oil pressure sensors also failing, so check for an oil warning light on the dash. Electrical faults can be a costly nightmare to trace, so always ensure everything is working.

Onto the fit and finish and the Bonnie is fairly well built. Corrosion can set in if the bike’s fasteners aren’t well looked after and the spokes corrode where they meet the rims if not properly dried after cleaning while the paint on the motor flakes off with little provocation. If it looks well cared for, the chances are it has been. The two-piston sliding brake front caliper is a weak point with its slider becoming pitted, causing the brake to start sticking, however as a rebuild will set you back less than £100 including parts, it’s not a massive issue. Irritatingly, none of the air-cooled Bonnies came with ABS, it arrived with the water-cooled bikes.

Finally, due to the huge number of Bonnie specials you do need to be wary of excessive customisation. A set of loud cans is a good addition, but be cautious of bikes that have been heavily modified and if possible, buy a fairly stock machine or one that only has bolt-on accessories from a reputable aftermarket supplier.

Any updates?

The Bonneville was initially launched with a 790cc air-cooled engine, however this was expanded to 865cc in 2006 alongside other updates to the bike’s chassis and motor. In 2008 the Bonnie’s 36mm carbs were swapped for a fuel-injection system before another update in 2009 saw its spoke wheels replaced by cast items. In 2017 the all-new water-cooled Bonneville replaced the air-cooled model in Triumph’s model range and brought with it a ride-by-wire throttle, traction control and (finally) ABS for the first time. As well as a few special edition Bonnie models (SE, Anniversary etc), which are generally just paint work and bolt-on accessories, the T100 has run alongside the stock Bonnie since 2002 and is effectively a higher-spec Bonnie with more chrome, spoke wheels and twin clocks.

What to pay for a Triumph Bonneville (2001-2016):

There are loads of Bonnies out there and while the smaller volume models such as the Thruxton and Scrambler tend to hold onto their value a bit better, the Bonnie is generally cheaper. You can pick up an early Bonnie for in the region of £3,500, but most seem to hit a price point of £4,000 and stay there generally irrespective of year. That is the benefit of a retro – it never goes out of fashion or looks dated! If you have £4,500 you can get a lovely example of a fuel-injected generation with £5,000 securing you a higher-spec T100 model. The absolute top end is £5,500 with only the very rarest of limited-edition models tipping over this point.

Who to ask:

The Triumph RAT webpage (www.triumphrat.net) is very active and covers all makes and models of Bonneville. There are also a few forums dedicated to the ‘Hinckley’ Bonnie models such as www.newbonnevilleriders.com or www.triumphtalk.com which are worth a look.

Triumph Bonneville (2001-2016) Specification:

To insure this bike, click here

To learn more about what the spec sheet means, click here for our glossary