Mr. Gill. Of course isnÂ´t the triplex chain a problem being able to cope with Laverda power. The reason mentioning it is that it is very strong so why change it for a belt which is nowhere near as strong.
As long as the 3 or 4 spring clutch easily can be modified to work as a modern clutch there is no need to go for the belt conv. I believe Mark Parker is still using the modified 4-spring 7-plate clutch in his 80 hp+ 883cc and my 800cc high comp uses the 3-spring 7-plate working excellent and with the tallest gearing possible, 22 - 46 chainwheel / close ratio g.box. As I said, modifications has been pictured and explained several times.. I would think this is proof enough for anyone that the original clutch will work ok if understanding what has to be done.. and for a reasonable price.
The chain will be stronger but if it does let go will make a huge mess, some belts are also better than others and the ones on the Bob Newby are not only proverb in racing but aren’t made of the same [***] material that many other aftermarket ones are made of.
As I say I had the 3 spring working well by the time i came and replaced it. It was using T120 springs at that point from lp Williams (some crap springs on the market) I tried T140 springs but the extra tension wasn’t much fun in town traffic.
For me I just find the Newby a good strong reliable unit. If I need to change final drive sprockets it quickens the whole job and makes it cleaner. One less chance of oil leaks and if there is a problem easier to sort on the side of the road. It’s a big plus if you do a lot f touring.
When it comes to the 400-4 Honda I believe it is the tensioner that fails an causes problems with the chain, not the chain itself.
That was exactly my point and reason for mentioning it. However the problem with the tensioner eventually effects the chain much quicker than it wears on the bigger bike.