sbyrn

Exactly! Thanks the tip.

I'll look for copies of those books, would love to have copies in the library.

That is a great observation about the change to observed sections. I had not thought about the impact of fuel scarcity on the sport.

Thanks to all for their input. In terms of the early competition bikes, any thoughts on modifications to the frames specific for trials competition. I wonder about the relationship to the geometry of the frame design during the 1950's up the end of the dual shock bikes. It seems that with the advent of the mono shock bikes there may have been a significant change in frame theory. I would be interested in learning more about how this developed or progressed during the period of the 50's to early 70's.

Were there standards put in place at some early time, as to what modications were allowed? Outside of the purpose built early bikes like Bultaco, what type of frame modifcations were common?

Ive spent my share of time watching film of pre-'65 events. During this time, did most bike start as a road bike rather than being purpose built? What type of modifications were typically made?

Thanks Mate!

Any suggestions on rejetting for higher elevations, 6000-9000 ft. ASL?

Thanks Goudrons. She may have to sit a while.

Gourdons, Thanks, I suspected it worked in that fashion some way or other. Now to decide what to do. Splitting the cases to replace these is above my ability. Not to many Ossa mechanics left in the US. I'd hate to just let the old girl sit or part her out. If I did decide to try and fix it, are there any special Ossa tools I need or may it be done with normal tools?

Gourdons, Thanks, I suspected it worked in that fashion some way or other. Now to decide what to do. Splitting the cases to replace these is above my ability. Not to many Ossa mechanics left in the US. I'd hate to just let the old girl sit or part her out.

Woody, havent split the cases but I suspect it is as you describe. Pulling the plug, you can roll the bike in gear and it shifts smoothly. Can't imagine why it just stopped working. It was running fine, shut it off to walk a section and no go when I went to kick it. Basically no resistance at all moving the kick starter through it's arc. Definitely sounds like the cases will need to be split. Need to think on that bit as it appears to be above my ablities. Thanks for the help.

Over the weekend the kick starter on my MAR shot craps and quit working. Pull the side cover off, kick start spring is intact and the shaft rotates freely. No metal in the oil. Just isn't making connection to turn the motor over. Thoughts? Can it be repaired without splitting the cases?

Whenever I get a new pair of boots, I always glue a patch of inner tube in the arch area of the sole to protect the boot sole from footpegs. I use contact cement and these last rather well. When they get chewed up, heat the patch with a hair dryer, pull it off and replace.

Anyone know where I can find a bearing/seal kit to rebuild the rear suspension on my '95 jt25 Contact?