Even though I would not use it in the trans for free, here's the latest on that.


Extended Service Intervals And Updated Fitment Announced For SYN3â„¢
Synthetic Motorcycle Lubricant
Purpose
The purpose of this bulletin is to inform you that Harley-Davidson has updated the fitment and has extended the
service intervals for SYN3 lubricant in primary chaincase and transmission applications.
Background
Harley-Davidson has updated the fitment and extended the service change intervals for SYN3 lubricant in
primary chaincase and transmission for all Big Twin and Middleweight Harley-Davidson motorcycles. As a result
of extensive bench testing and hundreds of thousands of miles of open road vehicle durability testing, Harley-
Davidson engineers have tested and certified this service interval extension.
Updated Fitment
SYN3 Synthetic Motorcycle Lubricant has been tested and certified for use in all Harley-Davidson transmissions
and the following Primary Chaincase applications:
• ’71-later XL, ’83-’84 XR 1000 models, and ’84-later FL, FLT, FX, FXD, FXR, and FXST models with wettype
diaphragm spring clutch.
• All Buell models
Action Required
Please inform all dealership personnel that the extended service intervals for SYN3 have been approved
through the Harley-Davidson Motor Company are as follows:
All Big Twin:
Crankcase: Replace after first 1,000 break-in, then every 5,000 thereafter (unchanged)
Primary: Replace after first 1,000 break-in, then every 10,000 thereafter or prior to winter or
extended storage periods
Transmission: Replace after first 1,000 break-in, then every 20,000 thereafter or prior to winter or
extended storage periods
All Middleweight (Pre-Evolution XL, Evolution XL and all Buell Powertrains):
Crankcase: Replace after first 1,000 break-in, then every 5,000 thereafter (unchanged)
(Please note that 1985 and earlier XL models require a crankcase service interval at
2500 miles (unchanged).)
Primary/Transmission: Replace after first 1,000 break-in, then every 10,000 thereafter or prior to winter or
extended storage periods
All VRSC Models:
Crankcase/Primary/Transmission: Replace after first 1,000 break-in, then every 5,000 thereafter
(unchanged)
Questions
Please contact Technical Service with any concerns regarding installation or product quality. Direct all other
questions to your SPOC representative.
849 05/17/2005


Source: http://www.harleyhog.co.uk/