KTM 990 Tremendous Duke Particular from Roman Juriš…
In 2005, the unique KTM 990 Tremendous Duke hit the motorcycling world like a two-wheeled bolt of lightning. Right here was a unadorned bike with a chromoly trellis body and a 999cc 75° “LC8” V-twin that laid down 120 horsepower and 75 pound-feet of torque. With a brief wheelbase, razor-sharp dealing with, and ferocious brakes, it was a hooligan’s dream.
“There’s certainly nothing extra frenetic on two-wheels than the KTM 990 Tremendous Duke in need of sticking a nitrous package, a jet turbine and a flame-thrower into the body of a fold-up bicycle.” –MCN
Our buddy Roman Juriš spent a lot of his life beneath communist rule in his native nation of Slovakia, which made it immensely tough to pursue his motorbiking goals. Now, in his “center or barely superior age,” he’s making up for misplaced time with a sequence of builds fairly in contrast to anything that lands on our desk. Roman customizes and modifies every bike to serve a driving goal he has in thoughts, and the ultimate product tends to appear to be a particular version the manufacturing facility itself might need produced.
Up to now, we’ve featured his Kawasaki ZR-7 cafe racer, Suzuki SV650 sport particular, and Jawa-Suzuki-Aprilia “JSA” supermono. On this case, he wished to construct a trellis-framed V-twin for sport touring…with an emphasis on sport:
“I wished a sporty touring motorbike however with decrease handlebars that vacationers often don’t like. As a result of I wished to journey a bit sporty and a bit touring.”
He picked up a wrecked 2004 KTM 990 Tremendous Duke in Germany and set to work. Roman has an avowed weak point for single-sided swingarms, which the KTM doesn’t have inventory, so he got here up with fairly the ingenious resolution for constructing one in all his personal:
“I made a decision to mix two arms into one unit. The half across the pivot and rear shock unit is a KTM authentic, whereas the one-sided swingarm with the wheel hub comes from the Honda VFR800.”
The VFR rear wheel is a good match for the usual KTM entrance wheel, and it’s virtually unbelievable how effectively the answer works! However we shouldn’t be too shocked, as Roman is quickly to obtain a European patent for a entrance suspension meeting of his personal design.
The entrance fairing relies on that of the Suzuki SV650/1000, however with twin headlights. Roman slimmed down the tank for a contemporary line and outfitted the cockpit with a Koso dashboard.
The OEM under-tail cans are gone, changed with an under-engine exhaust extra within the model of a Buell, which leaves the tail trying amazingly slim and tapered in comparison with inventory. After which there’s the sound of the fiery LC8 exhaling by means of the brand new exhaust line:
“It’s true that the shortened exhaust system isn’t splendid, and there’s a little bit of gunfire within the exhaust once you take off the fuel, however the sound is wildly addictive.”
The customized saddle and shade scheme tie every part collectively excellently. The bike seems to be like one thing that may really roll out of the KTM manufacturing facility, if that they had a penchant for half fairings and single-sided swingarms.
However that is no present pony. As the pictures beneath attest, Roman places some severe miles on his machines.
“The Duke is a brute with out…ABS or different digital toys. It’s driving for actual guys who reckon that particularly lengthy rides harm. The reward is superb driving traits and the sensation that solely you and no electronics management every part…”
Properly mentioned, Roman. Very effectively mentioned. Beneath, we speak to the person himself for extra particulars on the construct.
KTM 990 Tremendous Duke Particular: Builder Interview
• Please inform us a bit about your self, your historical past with bikes, and your workshop.
I’ve been desirous about bikes every single day for about 45 years. Apart from one huge break of about twenty years, once I solely considered bikes as soon as per week.
• What’s the make, mannequin, and yr of the donor bike?
KTM 990 Tremendous Duke, yr 2004.
• Why was this bike constructed?
I’ve a weak point for V motors and single-sided swingarms. For the brand new challenge, I wished a trellis tubular metal body with a double-arm inventory swingarm and an enormous V-twin engine as much as 1000cc.
Ducati ST2 or KTM Tremendous Duke got here into consideration. Discovering an acceptable donor was not straightforward. I lastly discovered a crashed Duke in Germany. It was determined.
• What was the design idea and what influenced the construct?
I wished a sporty touring motorbike however with decrease handlebars that vacationers don’t like. As a result of I wished to journey a bit sporty and a bit touring.
• What customized work was accomplished to the bike?
The unique entrance USD fork is superb; there was no purpose to alter it. The rear swingarm was an enormous problem. I made a decision to mix two arms into one unit. The half across the pivot and rear shock unit is a KTM authentic, whereas the one-sided swingarm with the wheel hub comes from the Honda VFR800.
It’s vital to notice that the rear wheel from Honda has the identical variety of spokes and the same design because the entrance wheel from the KTM. Subsequently, the change doesn’t have a disruptive impact.
I ready a easy drawing based mostly on the measurements of each swingarms. I eliminated pointless elements from each elements and welded the required ones. It could sound unlikely that it could match, nevertheless it actually does. All the things was welded up and the half nonetheless has the unique KTM marking.
The second drawback was that the Honda is a four-cylinder and the unique rear Honda sprocket was not aligned with the entrance KTM sprocket on the engine. I needed to make a mixture of a Honda central hub and my rear sprocket flange with a Ducati spocket, as a result of solely the Ducati is equally slim just like the KTM. I had just a few sleepless nights, however I managed to unravel this technical drawback as effectively.
One other problem was the muffler beneath the engine. The unique Duke has an enormous heavy exhaust up the again. As soon as eliminated, the rear remained superbly slim and the bike has a slim silhouette, virtually like a single cylinder. It’s true that the shortened exhaust system isn’t splendid, and there’s a little bit of gunfire within the exhaust once you take off the fuel, however the sound is wildly addictive. And the sound from the exhaust tip is throughout the noise customary.
I reduce down the facet “lobes” from the tank to realize a contemporary mild line together with the entrance and rear fairings. The entrance fairing relies on that of the Suzuki SV.
I used a Koso dashboard and I believe the seat is one other masterpiece from my upholsterer buddy.
Within the finals, the standard colours for KTM with graphics in my very own creation couldn’t be lacking.
• Does the bike have a nickname?
My spouse calls this bike of mine “the white and orange one.”
• Any concept of horsepower, weight, and/or efficiency numbers?
The engine is absolutely inventory. Altering the exhaust pipe modified the stream of exhaust gases. It was essential to fine-tune the map on the dyno.
• Are you able to inform us what it’s wish to journey this bike?
The Duke engine is a brute with out steadiness shafts, and it doesn’t have ABS or different digital toys. It’s driving for actual guys who reckon that particularly lengthy rides harm. The reward is superb driving traits and the sensation that solely you and no electronics management every part right here.
• Was there something accomplished throughout this construct that you’re significantly pleased with?
I’m actually pleased with the design of the rear swing arm and perhaps the truth that the bike seems to be “fairly” manufacturing facility.
• Is there anybody you’d wish to thank?
To all mates who did a terrific job welding, portray and fabric. And to those that didn’t shut the door once they noticed me coming.
Comply with the Builder
I’m an occasional correspondent for the Slovak web site motoride.sk beneath the identify “Romoto“. Right here you’ll find my articles about bikes, written with love and fervour for development and customising. When you’ve got a superb translator, you’ll be able to learn extra about this bike right here, right here, and right here.
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