there is still one, (two acually) big troubles with these carbs.
One: The most significiant: the off-idle bog and the abrupt bog when closing the throttle. (too-rich stumble)
This behavior is really easy to to test when you want to do a wheelie.
When you want to hold the front wheel at the same height, you have to moderate the throttle opening: open, close, open, close an so on... you get me.
When you do like that, you will notice that the thottle works like pushing the kill button over and over again. This carbs need to run a TOO big pilot jet to get rid of the off-idle bog. But when closing the throttle a little, it appears that the engine suddenly dies for a second, due to a too rich a/f ratio, making the engine to stumble.
This makes controlled wheelies both hard and sometimes dangerous!
Two: the throttle sticking to the bottom of the carb, a worn throttle linkage can make this worse too. Not a good thing either.
I ended up with the mikuni hs 40 and i have now a bike that i can wheelie alot easier, "as smooth as fuel injection" is a good comparsion.
All is up to how you use your bike, but for me it was dangerous and boring to have a carb acting like a on -off button. cause i like to do wheelies.(without being thrown off the bike)
If there are more TT:ers that have discovered the same thing as i have,
I can recommend the tm 40 pumper carb (hs40) as a problem solver!
I am 100% satisfied!
Sorry my bad spelling:bonk:
Edited by HondaXRider, February 23, 2010 - 01:07 AM.