MX250 Big end and filter cage

[Simon1506]

Hey Guys, just lunched my 74 MX250 (air filter was stuck up on the back where i couldn't see it and i did a race day battling with a face full of dirt) and when rebuilding it she has a 25mm crank pin and 311 rod. this is not what is in the manual or parts catalouge. i have a new rod and pin but dont have the bearing. are their any more common bearings for it? if not is the 93310-425N4 the correct bearing?
Are there any good aftermarket air filter options for these as my cage is knackered and never seals well?

Cheers

[William Doe]

Simon I have bought filters from DC plastics and they have come with a new cage included.

Send him a message and ask if cage is included , very helpful to deal with . Don't mess around with satellite importers go straight to DC much better / faster service  .

http://www.dcvmx.com/xcart/product.php?productid=17396&cat=331&page=1

[Lozza]

What is the big end eye diameter 31 or 32mm

[PCMAX]

Partzilla lists the bearing as 93310-524K4-00. They have them in stock for $42.77

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1974/MX250A/CRANK+-+PISTON/parts.html