The Gen 5.2 EFI is Mike Sampognaro's brainchild project. As our head Dyno Tuner with carbs and fuel injection, Sampognaro was convinced he could make some amazing progress with some technology. So, he set out to find some throttle bodies. He came across the Jenvey website and we liked what they had to offer, so we contacted them and got the ball rolling.
Mike Norman drew up what we were looking for on the CAD system, sent them the drawings, and several months later, we got just about what we asked for. The parts did have to travel across the pond an extra round trip, but Richard Jenvey was excellent about taking care of the issue expeditiously. A tip of the hat to him for Customer Service.
Engine Management System
Originally we were looking at a system like Motec, but through some Honda race-team connections of mine, we were introduced to Neel Vasavada with Apex Speed Technology. Neel worked with all the systems and recently tried the Pectel . He told us how much better he liked their system, and they were more affordable. It didn't take much more arm twisting than that to make the decision to go with the Pectel SQ6 system from there. This system will be able to program just about any feature we need from the engine. It has individually controllable coils and injectors. It can run multiple injectors per cylinder (but we're sticking with 1). The system is also a full data logger system compatible with most dashes. We are really looking forward to the new advancements and control we will have over so many features we have been so limited with on these motors in the past.
This engine will also have many features not tried on the other motors. Although still using the same Billet Marine Crankshaft (once the gear issues are sorted) it has the longest rod capable with the stroker motor (+1.75mm). It uses the Carrillo "A" Beam rods for the lightest steel rod and the shorter piston height actually saves us an additional 7 grams over the standard height piston.
We will be running a completely Microblue Racing treated engine (please see page dedicated to this here) including the entire transmission, piston assemblies, cam towers, oil pump, cams, rockers and shafts, bearings, and everything else we could fit in the box we shipped over. We have also ordered ceramic roller bearings for the entire motorcycle. We hope to cut every last bit of nasty horsepower-reducing friction, and add part longevity in the process.
This is also the motor that will be trying the first set of custom cams, valve train and exhaust system. So, again, many new things on this pet project. This is the bike we hope to achieve, or break, 100hp at the rear wheel with. Keep checking in to see how we make out.
SPECIFICATIONS (Gen 5.2 EFI):
Bore x Stroke: 57.0mm x 44.5mm
Pistons: CP/G-Force Design (Shortest Compression Height)
Rings: Yamaha FZR400 (2-Rings)
Bores: Bored Stock Cast Iron Liners
Rods: Carrillo Steel "A" Rods (+1.75mm Length)
Crank: Marine/G-Force Billet Crank (2ndGeneration)
Cams: Custom Spec Cams with RLR Slotted Adapters
Valves: Oversized Titanium Intakes Valves with matched springs and retainers for different cams
Max rpm: 14,500rpm
Exhaust: Custom, Dual 2-to-1 exhaust with undertail exit in rear.
Carbs: Jenvey Tapered 32~34mm Throttle Bodies with RC Engineering Injectors
CDI: Pectel SQ-6 Programmable Engine Management System (EMS)
Race Fuel: R-Tech "Outlaw" Race Fuel
Max hp: 100hp TARGET (Dynojet Rear Wheel Power)
Max tq: ~43 ft-lbs.
Cost to Build: ~$20,000 (estimated)
Status: Not Completed Yet