Silverlegacy, what you're describing sounds pretty much exactly like my son's Fazer 600 when we had it restricted to 33bhp for him.The restrictors are 4 big steel "washers" which just slot in the carb mouths - so that when the throttle is wound fully open, there's only the hole in the middle letting air through, and it's only about 1/3 of the size of the carb mouth.This means that no matter how far you wind the throttle open, things happen slowly after 5k / 6k RPM's, especially in the top two gears.Cruising on the motorway at 70 didn't leave much in reserve for instant overtaking.If, when you're riding it, the bike performs reasonably well on part throttle, but it just doesn't seem to do anything more when you wind the throttle past halfway, I'd say your bikes restricted - as long as it runs cleanly and doesn't misfire.Maybe just take off (or pull back) a carb inlet rubber and you'll soon see if there's a washer stuck in the carb mouth - the aperture left open on our sons bike was probably less than about 20mm diameter.
When i got my Fazer it was restricted with the genuine Yamaha kit ( carb springs, needles and a small plate in each carb), the bike went like a normal Fazer until you hit about 7500 rpm (in any gear ) at which point the power stopped and the bike vibrated really bad ( 110mph in top).Where abouts are you , some one local who has a Fazer 600 could take it for a spin ??Mark
I don't know if it's possible, but if it is it's FREE.Take out your air filter and have a look towards the carb inlets, with a torch shining on the inlets, open the throttle and see if you see anything in the carb inlet.
I might have to have a look at this and see if it can be done?I have tried looking on google for any good pictures of carbs to see if its possible, but not much luck?Has any one done any work on carbs to know if this would be the case or is there just too much in the way internally? to get a clear view?Its either that or wait til next week to get it dyno'd
Quote from: Silverlegacy on 27 February 2015, 10:32:26 amI might have to have a look at this and see if it can be done?I have tried looking on google for any good pictures of carbs to see if its possible, but not much luck?Has any one done any work on carbs to know if this would be the case or is there just too much in the way internally? to get a clear view?Its either that or wait til next week to get it dyno'dSorry, but won't work.The plunger (sure the name is wrong, but sod it) needs a vacuum on the engine side to draw it up, and allow fuel past the needles. All the throttle does is open a butterfly valve that increases the area, hence air/fuel flow into the engine.Put it this way - if it weren't for the plunger, you could flood the engine by twisting the throttle with the motor off. And you won't get anything like a good enough view through to check washers.My advice? Find a local foccer with a 600, and ask them to ride your bike. They'll know what a full power 6 should feel like! Plus, free!
Quote from: ChristoT on 27 February 2015, 04:17:27 pmQuote from: Silverlegacy on 27 February 2015, 10:32:26 amI might have to have a look at this and see if it can be done?I have tried looking on google for any good pictures of carbs to see if its possible, but not much luck?Has any one done any work on carbs to know if this would be the case or is there just too much in the way internally? to get a clear view?Its either that or wait til next week to get it dyno'dSorry, but won't work.The plunger (sure the name is wrong, but sod it) needs a vacuum on the engine side to draw it up, and allow fuel past the needles. All the throttle does is open a butterfly valve that increases the area, hence air/fuel flow into the engine.Put it this way - if it weren't for the plunger, you could flood the engine by twisting the throttle with the motor off. And you won't get anything like a good enough view through to check washers.My advice? Find a local foccer with a 600, and ask them to ride your bike. They'll know what a full power 6 should feel like! Plus, free!Thought the restrictor might be on the air box side. It was just a thought.Pretty sure it's called the slide, but I like plunger better! LOL
they run lean as standardk&n filter + new exhaust. fixed.
Sounds like it could be more in your mind like it has consumed you a bit and is just stressing you out.A carb balance is much better idea imo than just fitting other bits like air filters.Did the garage geezer take it for a spin or anything, obviously he hasnt said anything alarming.
I typed in "lean running" into Google and it said " when there is more air than fuel" and running rich is " more fuel than air"So as my bike is running lean, does that mean I need to cut down on the amount of air?