Archive for ‘Engineering’

May 15, 2017

Roadside Maintenance 

There’s a’wys summat! When your machine is reaching half a century in age even a 100 mile jaunt can uncover a mechanical snafu. Here Dean finds that the small timing pin plug behind the cylinders decided to jump ship somewhere between Glencoe and Antioch. Upsetting pressure and spewing a fine mist of oil onto the frame he had to get a 1/2″ bolt from a Napa auto parts store to make a temporary fix.

Knowing your bike inside and out means these impromptu repairs just delay an otherwise smashing weekend ride… 

April 29, 2017

Triple Power

Cubed – when Triumph emerged from the near fatal flatline in the nineties they used a modular engine design that could be shoehorned into different models. Good sturdy machines that still hold their own on the road. The Adventurous Tiger, rippled Speed Triple, and a speedy Sprint offered a British badged moto with doughty engineering.

April 5, 2017

Boiler Suit for Geordie?

Helpin’ Hound – I’ll just put this image here…

March 14, 2017

Pi

π – defined as the ratio of a circles circumference to its diameter, this mathematical constant is ubiquitous to the universe. It also has meaning for the motorcycle from Wheels to discs, gears and cogs, dials & caps, and lights. 

March 1, 2017

Woden’s Day

‘Ump Day – What do you get if you cross a Triumph and a Greeves? A Grumph! Perfect name for a mutt; even with immaculate pedigree. Offered the choice of a Rickman Metisse or this… pretty hard choice.

February 28, 2017

Liquid Engineering 

Oiler – here’s a stunning graphic advertisement from a late sixties magazine with no. 1 Gary Nixon powering his Triumph flat tracker in a somewhat psychedelic manner. Castrol

February 25, 2017

Brr a bit parky out there…

After last weeks brush with spring-like 60’s temperatures the true nature of February claws its icy talons back into our locale. We’re experiencing close to single digit wind chills right now. An inventive Triumph chopper owner takes snow removal into his own hands with this street-sign homespun plow. No snow here right now… perhaps if a whiteout beckons I’ll finagle a shovel attachment onto the Cub…

February 23, 2017

Giddy up 

Gearing Up – the work involved in stepping up from a 19 to 21 tooth front sprocket required some notching to be done to the case so the larger diameter gear could be slotted into the primary drive axle. 21 equally spaced grooves. Whilst I was in there the clutch was renewed which gives an very noticeable grab when throttle is applied. The gearing give about 12% extra wheel revolutions for the same engine speed. 

February 21, 2017

Hacky Dorty

Swarfega! – working on old motorcycles can be filthy work. I always find myself with oil ingrained hands even after a minor fuss of the bike. When doing the sprocket there was two chains to deal with, a road crud encrusted underside, some aluminum filings, and general grubbiness. 

February 19, 2017

Sunny Excursion 

Rather terrific weather today. Though a chill in the air under motion, the sun was warm with a crisp light and the roads clear. Taking back road that offered more than a few stretches, to let the newly geared engine stretch its legs, I can confidently announce that there’s a hefty bit more grunt in the parallel twin. She lowped along comfortable at 60 with more to spare. 

February 18, 2017

May days in February 

Climate Change – with an unseasonable warm-up over this February weekend, where the mid sixties are being reached, I’ve had to work this last week in getting the Bonnie ready for at least one days riding. I’ve changed the front sprocket from a 19 tooth to a 21 so I can squeeze a little more speed out of the engine. The work necessitated removing the clutch and making alterations to a sprocket access hole in the back of the primary case. I’ll show that work in a blog post later this week. I put in new clutch friction plates for renewed ‘bite’, and installed a new clutch basket as the current one had notches in the tang grooves. 

February 16, 2017

Twin

Big Opposing Twins – whether from Springfield MA, Milwaukee WI, Berlin Germany, or Mandello del Lario in Italy; these beauties all have a pair of cylinders in flat or vee form, longitudinal or transverse. But, the all make good power and each have individualistic looks, sounds, and heritage. Dang! This is all good stuff! Current motorcycle models on offer make the prospective owners spoilt for choice.

February 12, 2017

Showstoppers

Customs Officer – there were some superlative one-off builds at the show. Here are a couple of period Triumph bobbers in similar style yet very different execution. One has a brushed finish, luscious tank paint, open primary case, and a Jow Hunt magneto for spark. The other was polished to a mirrored finish – nearly to the point of distraction- with a sublime red flake frame paint job.  All great work though. 

February 9, 2017

Fettled 

Black ‘Gin – after the ‘new’ Cub we saw yesterday here’s another approach. A well sorted trials with a plethora of goodies from J&M Enterprises. Mostly engine parts: 250cc piston with matching barrels and other lightweight components.

February 8, 2017

Re-Boot

A New Wave – what a gen of a motorcycle: this seriously upgraded Triumph Cub looks like it breezed off a designers screen and rolled off the assembly line. Big able tires for sure underfootedness, disc brake up front to screech the rubber to a stop. Good suspension, and brown leather upholstered saddle. Blinkers let other know where you’re going. 

Ten out of Ten for this one!