Does 1st gear seem to have pretty slow acceleration for anyone else? IDK maybe I am just getting more used to the bike but when I first got I always thought 1st gear was gonna throw me off the bike if I punched it too hard. Now I feel like i can handle more and I just wanna get into 2nd gear so I can do faster.

Idk maybe its in my head or its the bike...but I feel like my 1st gear should be faster.

 

Is your clutch slipping?

 

Is it possible you pilot jets are misadjusted? That would account for poor performance at speeds <5k rpm. My bike feels rather weak in this realm, especially at very low speeds.

 

Yes this is exactly what I mean. Under 5k RPM it feels sluggish. Ill look into the pilot jets. Can you give me some more info about them tho?
Thanks

 

If I snap it open at about 4-5K my front end lifts up a bit. I could probably wheelie it if I tried.

 

So for low RPMs less than 5k, the pilot jets control how much fuel enters the cylinder. For higher speeds, a vacuum chamber slides open and moves the jet needle, which allows more fuel to enter the cylinder. The engine requires different air/fuel ratios at different speeds.

The jets are fixed parts; "rejetting" requires the physical exchange of jets to a larger or smaller size. But the pilot screws can just be turned in and out to control the flow of fuel.

The screws are D-shaped and are located near the bottom of each carb bowl. There is a procedure in the shop service manual which can be located on the web and downloaded. But unless you have a special external tachometer, you won't be able to adjust them to spec. This is where a dyno comes in handy... you get live results on the performance of your bike as you make minute changes.

But you probably don't have access to one of those either. Do you think your bike runs lean or rich at low speeds? Adjust all your pilot screws a half turn in one direction or another and see how it performs. That's about the best you can do without sophisticated tools.

 

How's your rear tire looking? My bike gets alot of wheel spin in first gear when the rear is getting a bit used, once a new one goes on the difference in acceleration is definitely noticable.

OK, unlikely to be jets if you havn't changed anything, (exhaust etc). Those D shaped screws are the idle circut adjustment, Will not affect much except idle.

 

Below 6k is what the pilot jet affects, and it transitions fully to the main jet around 7k. If you ride alot of twisties with skill you'll notice yourself avoiding dropping below 7k as your bike loses a lot of pull.

The IDEAL way to figure out what your bike is up to is a dyno run. This not only gives you your torque and HP curve, but also generally includes an air to fuel reading accross the entire spectrum as well. Using that you can see what can be adjustd to make any differences all the way accross the board, and the pilots too of course.


Clutch slipping could be a factor. Also it could be related to your unwillingness to rev into the power band (7k+ rpm) and dump the clutch. While it is startling, that's where your quick launch is at