My GZ250 gets funky in fifth...

[Easy Rider]

Originally Posted by Cordell_Love

hmmm, so that thumpin could be natural,

OK, here's where the disclaimer comes in:
The key words are "could be". It is impossible to know for sure without being there and I would HATE to cause you to ignore something that needs attention.
You need a second (experienced) opinion by someone onsite.

[Sarris]

You know, the more I think about your comments, maybe you're just up-shifting too soon. I normally won't even use 5th gear under 40 mph. With limited power on tap, you may just be lugging the motor, which can result in a "chugging" sensation. Why not have a pal or mechanic test ride it for you before you jump out your butt trying to fix something that may not need to be fixed?

Just a suggestion.

[jonathan180iq]

...Or not shift into 5th until you are somewhere around 55mph and on relatively flat ground. Then let us know if it still happens.

If he is experiencing this in the higher speed range it certainly isn't normal.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~

Originally Posted by Cordell_Love

You can hear the engine revving up before it lunges too.

Now that I just re-read this line, I think you need to change your oil. People who use some automotive oils get clutch slippage in the high gears. Has this happened ever since you bought the bike?

Easyrider, I see your $3.60 and raise you $0.40.

[Easy Rider]

Originally Posted by jonathan180iq

...Easyrider, I see your $3.60 and raise you $0.40.

I call. :biggrin:

[Cordell_Love]

yeah the bike's been acting up in 5th since i bought it...ya know I've gotta leak where the exhaust meets the motor, waiting on some new exhaust gaskets as i write this, i wonder if that might be having an effect...

[Easy Rider]

Originally Posted by Cordell_Love

i wonder if that might be having an effect...

Yes, might.

What other details have you left out of the story?? :roll:

[music man]

I have noticed that people do that on here quite a bit. My motorcycle runs funny when I am going 60, (18 posts and a lot of wasted answers later) oh by the way I have been pouring Aquafina bottled water in my oil and gas because my grandpa told me I could get better gas mileage that way. :bong: :bang:


Later

[jonathan180iq]

Originally Posted by Cordell_Love

yeah the bike's been acting up in 5th since i bought it...ya know I've gotta leak where the exhaust meets the motor, waiting on some new exhaust gaskets as i write this, i wonder if that might be having an effect...

Before I mentioned that you change your oil, I was going to suggest that, among other things, you do some general tighening of bolts between the carb and head and between the headers and head.

That's almost definately it.

These bikes are easy to knock out of proper jetting. An exhaust leak would make it not much fun at all.
There are no exhaust gaskets at the on the headers. The only gasket is on the muffler to header connection. Just grab 7 or 8mm ratchet and tighten up the bolts on the headers.

[Easy Rider]

Originally Posted by jonathan180iq

There are no exhaust gaskets at the on the headers.

Mmmm....OK, so what part do you think he is waiting for ?? :??:

One needs to be very careful when turning header bolts.....in either direction. A broken one is NOT fun to fix. (Wonder how I know that?) :biggrin:

[5th_bike]

Originally Posted by jonathan180iq

I'm gonna wager $3.57 that it's a disconnected vaccum hose somewhere.

You were right about the disconnected part, but I wonder if the exhaust pipe could be categorized as a "vaccum hose"... guess not.

Please donate my $3.57 to the forum. Thank you ! :rawk: