Thumper Club Forum

Club House => Chatter => Topic started by: Steve H on September 28, 2006, 07:12:25 AM

Title: Useful Technical Articles
Post by: Steve H on September 28, 2006, 07:12:25 AM

Ok it about Harleys but much of the theory is the same

http://www.nrhsperformance.com/tech.shtml

Title: Re: Useful Technical Articles
Post by: Andy M on September 28, 2006, 03:47:47 PM

Very good articles, but what a mess of an engine. 4 cams each with a gear and so much lash that Harley have to select each from a choice of seven sizes at assembly, yuk! Timing at 630 degree intervals so the lost spark system will work with a 45 degree V and single crank, double yuk! I guess the tuning boys sort of highlight the problems because they've got solutions, but the whole V-twin thing makes a thumper or even a British or German twin look really sensible.

Andy