still problems with rear cylinder carb ?????

[Darren69]

As Gazza suggests, I suspect you may have a sticking float/valve. Tapping can sometimes free them. But you've probably tried that already. Good luck with the carb swap!

[jerry]

Originally Posted by Darren69

As Gazza suggests, I suspect you may have a sticking float/valve. Tapping can sometimes free them. But you've probably tried that already. Good luck with the carb swap!

all float and float valves are new

I rechecked the valves and shims also ran compression test both e cylinders 115psi

bike still not running on rear cylinder below 4000 rpm ? have now removed carbs again and am taking the carbs off the 1997 monster to put on the 2000 one ,,,

im going to dismantle the bad carb again but what to do with it ??? I am at a loss

[utopia]

Originally Posted by jerry

I rechecked the valves and shims also ran compression test both cylinders 115psi

A bit of a red herring here from me because I don't think it has any logical connection to your current problem, but ...
I happened to be reading an old thread of yours where you previously did a compression test on one of your 750s.
After initially getting low readings due to a leaky o-ring seal, you ended up recording 148psi on both cylinders.
Your recent readings of 115psi seem rather low in comparison.

However, since the readings from both cylinders are the same then it probably throws no light on your current problem.
Sorry that's not very helpful.

A couple of other thoughts ....
1) It seems unlikely that it would only affect running at low revs but is it worth checking for a leaky diaphragm ? I only mention it because it seems to be one of the few remaining areas that you haven't either checked or replaced.
2) Is there any chance that this is a problem of fuel delivery TO the carbs .. eg a faulty fuel pump ? I can't rationalise why this might affect only one cylinder though. But if you have one of those temporary fuel "tanks" which you hang above the bike, you could try running the bike from this (ie eliminate the fuel pump from the system) and see whether it makes any difference. As said earlier, I can't see why it should but if you've already tested the most obvious areas then maybe its worth investigating the less likely ones.