V-Tech Motorsports services performance American, European, and Japanese motorcycles.
The following are a typical performance enhancement projects performed by V-Tech:
BUELL / XL 88 cu in
Looking at the dyno graph you can see this is going to be a fun motorcycle to ride! This thing has got torque everywhere. Crankcase boring required to accept Axtell 88 cu in (1440cc) cylinder piston kit.Crankshaft flywheels were also balanced to larger pistons, .536 lift cams and ported heads, HSR42mm carb, force pipe, and stock ignition was retained. An average buell with pipe and jet kit puts out around 77 hp and 76 ft lbs of torque, the big 88 in has 103 hp and 103 ft lbs of torque, and you can definetly feel the differece when you ride this torque monster.
103 cu in Twin Cam
This 02 Dyna has really good torque right down where you ride, no need to ring its neck to feel the power of this 103cu in. The project starts by installing 4 3/8 flywheels, boring the stock cylinders to 3 7/8, using matching forged stroker pistons. Then the stock chain drive cam arrangment is ditched in favor of some Wood .590 lift gear drive cams, cylinder heads are then modified to accept the larger valve lift. A Serdi competition valve job with 1.900 Ferrea intake valves, and 1.615 exhaust are installed along with proper valve springs. Cylinder head porting is also performend in house to provide maximum torque numbers on the dyno. In the carburation department a HSR 45mm carb was installed and jetted accordingly. Vance & Hines pro pipe was used for exhaust, Harley S.E. adjustable ignition was also tuned in providing max power with no detonation. If you take a look at the dyno graph you can see a stock 88in twin cam has just about 60hp with 75 ft lbs of torque, and the 103 cu in is putting out 109 hp and a gnarly 120 ft lbs of torque, with over 100 ft lbs at 2,500 rpm! All at a cost of which most people spend on chrome or wheels.
107 cu in Twin Cam
Jeff just cant leave anything alone, with just 12 miles on his 03 Road King it had to come apart and have some life breathed into it. Having stroked other twin cams to 106 cu in, his approach was going to be different. First he would install Axtells 107 cu in big bore cylinder kit then later he will stroke it to a 117 cu in. Using the big bore kit requires crankcase boring, with that handled the crank would also need to be balanced to the 107 pistons. Jeff install oversized valves and ported heads accordinlly with Wood .590 lift gear drive cams. An HSR45mm carb with S.E. intake manifold, V&H; pro pipe, and Crane ignition box was installed. Jeffs bike produced about 63 hp and 76 ft lbs of torque stock, with the 107 cu in Mods it now puts out 103 hp with 119 ft lbs of torque (4 th gear). Never happy jeff has started to mod another set of heads, when this is complete he will begin to prepare the bike for the stroker crank making it 117 cu in.!
883 to 1200cc Sportster Conversion
Lets face it the stock horsepower on a 883 is rather bleak, for very little money you can almost double your power without sacrificing any reliability. Stock cylinders can be used by boring out .500, yes that right a whole 1/2 inch is removed from each cylinder, bringing it out to stock 1200 specs. Forged 1200 conversion pistons are fitted to each cylinder. Head work is then performend, cutting valve seats for the 1200 conversion valves, now porting can be performend. The stock CFM on the intake valve at 10in @ .500lift is 105cfm, ported with o/s valve @.500 lift is 125cfm, stock exhaust is 78 cfm, ported with 1200 valve is 105 cfm. Harleys Screamin Eagle drop in cams were also install.(497 lift) Stock valve springs can be used with these cams. Thunderslide jet kit was installed into stock carb, stock exhaust with baffles removed, and S.E. ignition was also installed. Looking at the graph you see a stock 883 has 42 hp and 45 ft lbs of torque, and the conversion 1200 has just about 80 hp and 80 ft lbs of torque. Along with the two less teeth the 883 has on the drive pulley and better cylinder head chamber, it will eat most standard 1200’s.