A few years in the past, Sinroja Bikes had been one of many first workshops to hitch Royal Enfield’s new customized program. They constructed a few bikes, and the connection went nicely. So when Sinroja had been in search of a model companion for his or her newest challenge, they knew simply who to name.
The Leicester-based customized store wished to enter the European Sultans of Dash race collection within the ‘Manufacturing facility’ class. All they wanted a manufacturing unit to collaborate with.
Royal Enfield and their Industrial Design boss Adrian Sellers got here to the social gathering with a model new Continental GT 650, however there was an sudden twist. By the point every part was singed off, Sinroja had simply 4 weeks to prep the bike.
“Normally we will do aesthetics or efficiency in that point,” brothers Rahul and Birju Sinroja inform us, “however this challenge wanted each. It needed to look good and go quick.”
It definitely wanted to be quick. Sinroja’s Continental could be competing with a nitrous-powered BMW 1250, a nitrous-powered Indian Scout ridden by the legendary Randy Mamola, and a supercharged 200-plus hp Harley.
The brothers already had an idea in thoughts: they might loosely take inspiration from a drag racer Royal Enfield themselves had beforehand constructed, ‘The Lock Inventory.’
With assist from Tamas Jakus at Jakusa Design, they rapidly mocked up the design and graphics for ‘Two Smoking Barrels.’
However sharp appears to be like alone weren’t going to chop it. With simply 47 hp from its 648 cc parallel twin motor, the Continental GT 650 was significantly outgunned. “The challenge route was clear from starting,” the blokes inform us. “We knew we needed to go as light-weight and as highly effective as we may.”
“When the already bare Continental GT (which weighs 205 kg) was delivered, we had been fearful. There weren’t any huge physique panels to strip to shed pounds rapidly.”
Fortunately for Sinroja, efficiency consultants S&S Cycle had been in on the challenge from the phrase go. They’d beforehand labored with Royal Enfield and Harris Efficiency on ‘The Lock Inventory,’ and crammed the brothers in on precisely what kind of numbers had been achievable. That information additionally helped Sinroja set a aggressive goal weight for the Continental GT—150 kilos.
S&S Cycle despatched over customized pistons and sleeves to bore the dual out to 750 cc. Additionally they provided new injectors, cams, and an ECU, and constructed a straight-through twin exhaust system.
That gave Sinroja an excellent naturally-aspirated base to work from, however they nonetheless wanted an additional increase. So that they known as on Trevor Langfield at Wizard of NOS to assist them arrange a singular dry nitrous system. The system’s neatly packaged beneath the seat, the place the GT’s air field and wiring was once.
With efficiency sorted, Sinroja began plotting the Continental GT’s eating regimen. All the things was stripped off the bike and weighed, in order that they’d know what to maintain and what to ditch.
They wanted a good entrance finish, so that they dug a contemporary sportbike entrance finish out of their elements bin, shaving off one of many brakes to maintain issues mild. Danny at Fastec machined up a set of billet aluminum yokes to work with the inventory headset. The lighter forks and yokes accounted for nearly 10 kg of weight saving.
The rear finish obtained a extra radical remedy. Sinroja ditched the rear suspension solely, then fabricated a brand new hardtail from Reynolds tubing to save lots of weight and prolong the wheelbase. They wished to swap out the wheels as nicely, however couldn’t get a set of 17-inchers made up in time. So that they saved the inventory 18-inchers, wrapping them in Continental rubber.
Weight saving turned an obsession. Rahul even recalled a lesson from college, the place his professor defined how Toyota shaved 10 kg off a sports activities automobile simply by decreasing the load of all of the fasteners. So Sinroja swapped each final nut and bolt for lighter variations, and trimmed one other 2 kilos off.
With the rolling chassis achieved, it was time to piece every part collectively. Chris Walton helped the brothers out by shaping an aluminum dummy tank, the tail finish of which really kinds the seat pan.
Three fasteners maintain down the complete association. Beneath it, you’ll discover a two-liter gas reservoir, a Lithium-ion battery from Antigravity, and a lot of the electronics. (Towza from Towzatronics constructed a customized wiring loom on the final minute, trimming an additional three kilos from the bike.)
The previous few mods included a super-minimal cockpit, and a carbon fiber entrance fender comprised of the identical mildew because the one discovered on ‘The Lock Inventory.’ Glenn at GD Design dealt with the paint, exhibiting off the English flag on one aspect, and the Indian flag on the opposite.
Then Ian Tam, Constantinos Panayides and Tommy Butterworth helped Sinroja setup and tune the bike, together with Royal Enfield’s tech heart employees.
On its first outing, ‘Two Smoking Barrels’ took gold on the Punks Peak hill climb at Wheels and Waves. And it got here fourth on the final Sultans of Dash race, narrowly lacking the rostrum.
Not too shabby for a final minute rush-job.
Sinroja Bikes | Fb | Instagram | Royal Enfield product web page | Photographs by, and with because of, Marc Holstein
Sinroja wish to thank Royal Enfield, together with sponsors S&S Cycles, Bell Powersports, and Contimoto UK.