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Old 10-13-2012, 02:34 PM   #19
R100RT Mark
Gnarly Adventurer
Joined: Feb 2011
Location: Georgia, USA
Oddometer: 266
Originally Posted by Airhead Wrangler View Post
From '85 on, I believe it's just combustion chamber diameter. Depth is the same, I think. Valve sizes are the same………
So, castings the same, just machined differently. Yes? Valve seats in the same position?

Current Rides: 1974 TR5T : 1993 R100R : 1994 R100RT
Past Rides: 11# 1970s BSA/Triumph Singles & Twins : 2# 1970s CZ 125s : 1985 BMW R65 : 1976 Moby X7
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