Jobert,

First thing I would do is remove the spark plugs and check those for
exccesive wear or junk. While the plugs are out, do a dry compression test
and record your findings. Then do a wet compression check. If any of the
values increase SIGNIFIGANTLY then it would indicate that you likely have
damaged ring(s) in that cylinder.

If doing the wet test does not increase the compression drastically, then
the compression leak is either through your head gasket or your valves. The
next step would be to check the valve clearances. Refer to the manual for
that, it's a bit of a lengthy process.

If the compression is fine across the board, then the only thing I can think
of is to check your timing.


>From: "jobertflorentino" <jobertflorentino@...>
>Reply-To: suzuki250fours@...
>To: suzuki250fours@...
>Subject: [suzuki250fours] guys need your help
>Date: Thu, 29 Jun 2006 03:12:23 -0000
>
>i own a gs250fw bike. but i cant make a rev on upto 12000 rpm.. .. what
>could be wrong in my bike? help me please..
>
>tnx.
>
>-Jobert
>
>
>