Posts
648
Joined
4/1/2008
Location
Kamloops
CA
Edited Date/Time
12/19/2017 3:08pm
I would like to find one of these to make a stroker YZ125
It appears that there is enough clearance to spin the bearing on.
Apparently no case mod required.
Would the pin have to be TIG welded after to prevent spinning?
With a 2mm stroke the cylinder head height would need to raised, would this be done with base gaskets?
Thoughts?
It appears that there is enough clearance to spin the bearing on.
Apparently no case mod required.
Would the pin have to be TIG welded after to prevent spinning?
With a 2mm stroke the cylinder head height would need to raised, would this be done with base gaskets?
Thoughts?
two piece rod, but on a 2 stroke rod?
Also, a 2 mm lengthened stroke would more that just a base gasket change as that would alter port timming.
Paw Paw
Even though the crankshaft pin is set eccentrically, the use of the usual size bearing (20 x 26 x 15mm, Art. Nr.: GDT0304A) is still possible. During assembly lubricate the crankpin with plenty of oil first. Starting with the bearing held at a slight angle, screw it firmly but gently into position.
Maybe the clearances are higher between pin and rod on these scooters than YZ etc? Chris Applebee's in UK will build these cranks for YZ125, cost £180. Trying to get additional info.
Chris Applebee's youtube
Whether you stroke the crank or use the eccentric pin, it opens up all sorts of headaches like port and ignition timing, case clearancing, pipe design and a bunch of other stuff.
Post a reply to: Eccentric Crank Pin