Crankshaft

gizmo98

RMS Regular
Messages
6,360
Drives
Vrs Octavia
Any bike men know what the longest stroke size I could get from a single cylinder crankshaft ?
Need one for a wee project,but would need a 70mm or larger stroke
Maybe not possible ?
 

Apis

RMS Regular
Messages
4,073
Location
NW
Drives
various
DR850 is the biggest single I can think of. Checked the stroke on the web and it's 90mm!
KTM 690 is 80mm.
DR650 / Freewind would be cheaper/easier to get and it's 82mm.
 

gizmo98

RMS Regular
OP
G
Messages
6,360
Drives
Vrs Octavia
DR850 is the biggest single I can think of. Checked the stroke on the web and it's 90mm!
KTM 690 is 80mm.
DR650 / Freewind would be cheaper/easier to get and it's 82mm.

Perfect
Thank you đź‘Ť
 

gizmo98

RMS Regular
OP
G
Messages
6,360
Drives
Vrs Octavia
im dying to know what your making???

It was for making a kindling chopping machine for the old man,I’ve went a different route now just need a couple of more parts gathered up before I can put it together
 

Nicky

RMS Regular
Messages
24,533
Drives
HiluxSurf
You’d get a much longer stroke using a wheel with a pivoted arm, much like a trains drive wheel.
 

gizmo98

RMS Regular
OP
G
Messages
6,360
Drives
Vrs Octavia
You’d get a much longer stroke using a wheel with a pivoted arm, much like a trains drive wheel.

That’s what I’m using now,the one I’ve got here will give a 6” throw which is perfect
 
Top