Routy wrote on 05/01/11 at 08:02:23:MotoBuddha wrote on 05/01/11 at 07:26:34:Evidence?
The fact the exhaust turns blue is evidence it's running too lean.
The popping on deceleration is evidence it's running too lean.
EPA regulations are evidence the bikes are intentionally set up very lean.
The FACT still is,
Quote: Contrary to popular belief, many of these bikes,.....even the later s-40s run fine stock as a clock.
If you think pipe blueing is proof its running lean, you are wrong ! Just the residue from some types of cleaners can cause severe blueing, not to speak of the quality of some chrome.
You also seem to think that all carbs are identical,...wrong again.
True some stock bikes run fine, just as true, some do not.
There's at least 1 story of the owner pulling the plug to find that the idle mixture screw was turned all the way in. And we all know that adjusting it can be difficult.
Add in mfg tolerances and blue mondays and you get brand new savages that kerpow from day 1.
And MB is talking about overheat blueing and you know that. You don't have to get high and mighty to expand on it. Overheat blueing is a pretty serious issue. Besides requiring a lot of elbow grease and blue job to fix, it can burn the pistons and valves leading to premature death of the savage.
Personally I do kinda wince when it is suggested that to go up to a 55 and 155 jets w/o any testing beforehand, but they have the experience with the actual components involved. Just hope the written instructions are clear enough to show when leaner jets are needed.