Attention, this crankshaft increases the engine displacement, it is in any case approved nor authorized on public roads, only for competition on the track and prepared for motor circuit, run ....
Here BRK special crankshaft Competition long race 45mm. This crankshaft in this long race 45mm will allow you to gain approaching engine while the engine driving movement called "square", a gain of real and perceived performance. However beware, the long passage race increases the charts, so do not pose a kit which has very large diagrams in race 40mm on a 45mm stroke failing to obtain unusable diagrams.
We do not recommend completely the passage of a kit 50cc (40mm) in long race, you would turn in hyper race .... Clearly, the race 45mm if it is well accompanied will prove to be a very big gain torque and performance. If you want to ask this crankshaft on a normal kit for race like MALOSSI MHR TEAM, TOP PERFORMANCES or other .... You must provide a hold of 3mm thick! You also need to better predict align the lights at bottom dead center, we recommend checking the charts during assembly.
Apart from that, this crankshaft has a quality / price / performance good, the masses are full for more pre compression, dynamic balancing is performed digitally, steels are qualities! The finish is very good, the rod size 85mm (as originally) is an enhanced polished model with lubrication for the needle cage, placed on anti-friction wedges and silver cage with specific lubrication. In other words, it must bear hardship without high revs and conditions breakouts uses!
Silks (carried bearings) are diameters Ø17mm, so you can ask reinforced bearings size origin Ø17mm X 40mm X L.14m. The pin is a Ø18mm diameter, solid masses make a diameter of Ø77mm. The improved lubrication and careful finish with a real dynamic balancing. Delivered with needle cage Ø12mm X Ø16mm X L.16mm.
Detailed specifications:
Dynamic balance: yes
-Maneton Ø18mm
-Course: 45mm
-For Long race kit or wedge 3mm base
-Soies Of: Ø17mm like the origin
-Bielle Reinforced 85mm size as the original
-Cage Needle: Ø12mm X Ø16mm by L.16mm
Masses: full size Ø77mm
-Clavetage: Yes
Example Cylinder
-Kit Ø47,6mm with race 39mm original = 69,36cc
-Kit Ø47,6mm with 45mm stroke = 80,03cc
-Kit Ø50mm with race 39mm original = 76,53cc
-Kit Ø50mm with 45mm stroke = 88,31cc
--For A kit intended for home race 39mm must a hold of (race 45mm - 39mm = 6: 2) 3mm thick
--For A kit intended for a long race 42mm (normal rod) must a hold of (race 45mm - 42mm = 3: 2) 1.5mm thick
--For A kit intended for a long race 44mm (normal rod) must a hold of (race 45mm - 44mm = 1: 2) 0.5mm thick
