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Ti valve questions
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[QUOTE="Swiss, post: 1250481, member: 26417"] Thanks Rich, Of course we don't think of the obvious sources even though I have been to Kiblewhite several times before. Their online catalog doesn't show the Ti valves available for all of the newer models, and I didn't see any info on the seats but I will dig further into the site and when I need to I will call them directly. What we are looking at is the problem of running the older Honda XL350 engines in race bikes (flattrack and MX Vintage) and the source of rocker arms (Honda) is getting slim and some of the really high lift cams like the 2790 Megacycle put a lot of stress on the rockers. So there has been some rocker breakage. The options are to design and engineer a limited production run of stronger rockers that would hopefully not be even heavier than the factory pieces, but they would of course be limited in market value so you could say Expensive! I am looking at it from a different direction and that is reducing the stress on the rockers because of the high rpm 50+ hp engines, but running lighter valves and a lighter spring pack. I understand that there is still some increase in replacement costs because they aren't going to last as long as a good set of Stainless valves (as long as neither of them are bouncing in valve float). AND I understand that given the higher rpm control that the lighter Ti valves and matched springs would allow, there MAY be some racers that further raise the Redline and still raise the stress levels back up to marginal conditions. But they would be running even faster than they are now!!! HA!HA! I have kept tabs on many of the posts in DRN on a regular basis Rich, but I don't get involved unless I have something constructive to contribute. I really enjoyed the "Blair" days and I learned a lot during those lengthy posts. One of the most important things that I learned is that regardless of the accomplishments of anyone in the "hobby"/business, no one has tried everything. Not even the engineers in the major Japanese corps. have an unlimited budget and unlimited time to research every option in their search for performance. I was browsing the Tech posts the other day and saw an old group of posts on "no-jet" carbs that was long ago retired. Enjoyed the read and the marketing "hype" that was evident that you sliced through so accurately. I do sales work for advertising, but I try not to "fool" my customers with unrealistic claims for our print product. I also talked with Jerry Branch of Branch Flowmetrics years ago and he called the Posa-Fuel (actually based on the English Gardner design) a poorly controlled leak! HA!HA! I do know that the machining and designs have come a long ways with these carbs, but they did much of that by adapting designs from conventional carbs to work with idling circuits etc... Now we will play with FI for the next 10 years, looking for more and more performance which seems to be a never ending goal! Swiss [/QUOTE]
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MX, SX & Off-Road Discussions
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Ti valve questions
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