incl. VAT plus shipping costs
|thread rotor side:||M12x1,25 right-hand thread|
|thread drive side:||M10x1,5 right-hand thread|
|diameter crankwebs:||87 mm|
|width crankwebs:||35 mm|
|diameter bearing seat rotor side:||25 mm|
|diameter bearing seat drive side:||17 mm|
|diameter oil seal seat rotor side:||24 mm|
|diameter oil seal seat drive side:||22.7 mm|
|full circle crankshaft:|
|filling material for full circle:||steel|
|rotary valve crankshaft:|
|crankcase has to be milled:|
|engine casing has to be modified:|
|length connecting rod:||105 mm|
|thickness connecting rod:||5 mm|
|diameter small end connecting rod eye:||19 mm|
|lubricating hole at small end bearing:||yes|
|diameter crankpin:||20 mm|
|lubricating hole at crankpin bearing:||slot|
In order to fit the larger diameter crank webs (87 mm on the flywheel side and 86 mm on the drive side) you have to machine the casings to 88 mm.
The next innovative feature is the piston rod length which has been increased to 105 mm (8 mm longer than on standard 125 cc Smallframe cranks).
The crank is a perfect fit to some of the latest Smallframe tuning kits that are designed to be run with this sort of piston rod.
An easy way to use it with every other barrel available, is to fit the 8 mm bgm spacer (BGM0223) and longer cylinder stuts (BGM 0290). Also available as complete kit (7673184)
This results in better power and reduced primary compression, which works well with the modern day exhausts, such as the ones made by manufacturer Ludwig and Scherer, as the port transfers at the casing can be improved and the flow optimized.
-strong crank webs
-less twisting danger
-higher primary compression
-less stress to piston and bearings
Preis/Leistung IO TOP Produkt !