Honda305.com Forum

mech o1 · Post by **mech o1** » Mon Oct 26, 2009 10:10 am

dose any one know if runin 20w50 will improve clutch proformance or dose it has to have the requierd 30w non detergent 65 cb 77e any input would be helpful..........mech o1

Gun · Post by **Gun** » Mon Oct 26, 2009 10:37 am

many threads about this up in the engine forum.
everyone has a different opinion.
newer oil has it's benefits as it's more advanced, better cleaning, better lubrication.
but the older oil has over four decades of history running very well without any problems in these engines, and it's cheaper.

up to you.

e3steve · Post by **e3steve** » Mon Oct 26, 2009 12:59 pm

Mech, any oil of the correct grade and/or range that's labelled JASO MA2 would be suitable for wet clutch applications.

Quote:
"JASO
The Japanese Automotive Standards Organization (JASO) has created their own set of performance and quality standards for petrol engines of Japanese origin.
For 4-stroke gasoline engines, the JASO T904 standard is used, and is particularly relevant to motorcycle engines. The JASO T904-MA and MA2 standards are designed to distinguish oils that are approved for wet clutch use, and the JASO T904-MB standard is not suitable for wet clutch use.
For 2-stroke gasoline engines, the JASO M345 (FA, FB, FC) standard is used, and this refers particularly to low ash, lubricity, detergency, low smoke and exhaust blocking.
These standards, especially JASO-MA and JASO-FC, are designed to address oil-requirement issues not addressed by the API service categories."