01 monster 750 not getting enough air.

[koko64]

I run K&N filters because I run open airboxes. If under oiled they let dirt through and if over oiled they cause rough low rpm running. They may let significant pieces of dirt/sand/silt through if you dont grease the rubber sealing gasket on the filter perimeter. That's the main cause of many issues imo.
If I ran closed airboxes I would run oem paper filters and change them regularly, say every third oil change and just wear the cost. An Aussie company called Ryco made oem equivalent paper filters, not sure if thats still the case.

[Jimmyv0119]

So are the dynojets worth having I found them for around $80 and as for filter I think im going to try the k&n filter and see how that does

And yes at first the overflow tube was leaking fuel but after getting it started and running it a bit it doesn’t seem to leak anymore and since I’ve had the bike I have put premium fuel nothing else.

[koko64]

Ok. Your carbs have been flooding and that can give those dymptoms. Run regular gas as premium can foul plugs and cause rough running. You would only run premium if you had hi comp pistons and I'm guessing the bike is pretty stock.
If the bike is stock and you are running an open airbox lid then get a Dynojet or Factory Pro jet kit fitted. With a closed stock sirbox you can run stock jetting. If the bike has vacuum fuel tap (under the tank at the back with two hoses) then get a manual tap and plug the vacuum hose with a small bolt and clamp. They can cause issues and there are threads you can search here on how to do it.

[Howie]

Ok. Your carbs have been flooding and that can give those dymptoms. Run regular gas as premium can foul plugs and cause rough running. You would only run premium if you had hi comp pistons and I'm guessing the bike is pretty stock.
If the bike is stock and you are running an open airbox lid then get a Dynojet or Factory Pro jet kit fitted. With a closed stock sirbox you can run stock jetting. If the bike has vacuum fuel tap (under the tank at the back with two hoses) then get a manual tap and plug the vacuum hose with a small bolt and clamp. They can cause issues and there are threads you can search here on how to do it.

Shoulda thought about flooding.  That would explain the sudden change.  And float height.  750's are pretty low compression, 9:1.  Regular gas! 

If you live in the US, Dynojet stage one with OEM springs.  US bikes had different jetting than the rest of the world, notably leaner.

[Jimmyv0119]

So me being new and all I tried sticking to the Manuel and doing what it says and it calls for premium gas so your saying to run regular why again? I didn’t want to harm the bike just trying to make it run at its finest. So for sure getting dynojets now and I will try to use the k&n filter if it seems to run weird or sluggish. And as for gas I just filled up my tank with premium two days ago but after that tank is done I will try running reg gas and seeing how that does for the bike.

[ducpainter]

The only reason for high octane, or premium fuel, is to prevent detonation. It is accomplished by using chemicals to inhibit the fuel burning too quickly.

Your 750 is too low compression to detonate on regular fuel, and the chemicals that are used in high octane fuel will only cause carbon in your bike. Trust them...they're telling you right.