View Full Version : Triumph speed twin

08-28-2010, 8:44 PM
Hi to all....
I do a lot of riding on my 1950 Triumph Speed Twin...problem tho' is excessive build up of crankcase pressure resulting in oil forcing its way into mag ,dynamo,etc.The relief valve on the end of the camshaft cant seem to handle it....I would be appreciative of any suggestions to alleviate the problem.One suggestion was to bore a small hole from the crankcase to the primary chain case but should there be a one way valve here or does it not matter? comments....thanks