Lozza its not the first time you have thrown out the log book sugestion .
I for one know sweet FA about log books , perhaps you could give us a detailed run down on how log books are used and how they would benefit Vintage MX .
Remember though that im sure im not the only one on here to whom log books are completly alien , so start at the begining 
Probably best start a new thread on it though .
Pretty easy Bill the thrust or essence of it is the onus of proof of eligability is with the competitor/entrant, by having a log book someone has looked at your log book and bike and signed off that the bike matches the pic in the log book. Mind this is not really a issue at club level more aimed at crushing eligability related protests at National titles.
I'll give you a couple of examples,remember I pestered a you for pics of a RA 125's racing in 1980. What I was trying to establish was that a full floater water cooled RM125 raced in 1980. That would allow the build of a Period 5 road race bike based on the RA125. Doc had a mag dated March 1980 with a pic of such a bike. 'Suz125' rang Ross Martin and explained this is what we want to do, Ross said that was fine by him so long as we had the proof that such a bike raced within the period. The exercise became moot when the cut off date change to 1982.Another time I rang Ross and said I have a lot of evidence a model was freely available in 1990 though being a designated a 1991 model. Ross asked what were the changes to that model, I outlined the changes and got a firm NO. The baseline rule was 'Is it a big enough difference to make a difference?' if yes then the application would have been unsuccessful, even though it meets the criteria for pre90 racing.So before we built the bike we made sure we were going to comply with the rules.
So what happens when you send away for a log book, someone who might not know anything about VMX looks at your log book application and your evidence and says yes or no. If you have a stock bike , the application will just say , "as per showroom" or completely standard. If you have modified the shit out of it you list the modifiactions and show proof that the modifactions are within the rules and period, IF there is a eligability protest the log book is the first thing checked, if your bike is not as per the log book, well I'm sure you can join the dots.
Fact is it has stamped out 99.99% of eligability issues with HRR.
So lets look at the example of Johnny O's RM with the Simonds forks, if Johnny applies with a swag of magazine articles with adverts, race reports, pics and tests using these forks. That is good enough, however if the rule states no more than 9 in travel Johnny would have to show a pic/drawing of how he limited the travel. Log book granted.So if that bike goes to the Nats and someone protests that it has more travel than 9 in, it is very quickly and easily sorted. Either it has or hasn't, either it complies with the log book or does not. There is no grey area. Not many have stumped up the protest fee after log books were introduced , due to the fact any protester is arguing with someone who made a judgement on the evidence that was presented. Also just because someone else gets a log book with a trick part does not mean that component is automaticaly eligable each and every applicant must present their own evidence if they want to use that component.
Main thing is there is no debate, no yeah but's.. Log Book= Period eligable.
