1987 Yamaha FZR 250 - Answered Questions & Fixed issues

number 1 is by the cam chain , remove plugs and rotate engine by hand ( in gear , on main stand ) tdc n, 1 with a screwdriver down plug hole and then see which cyl comes up nxt etc etc !

sounds like your float is stuck holding the jet openno easy way to fix it must take carbie off use a white to cloth tip it on so you dont lose any parts remove the bottom of the carbie you will see the float under that is the jet remove clean spray with wd40 and put it all back together

Try Babbitt's. Please rate my answer. www.babbittsonline.com

No you can fit 3ln pistion to a 2kr without extensive modification. Sorry the piston pin height is different'
This is to allow for the changes yamaha made in the rod length
82mm 3ln .
80mm 2kr .
Hope this helps

Hi I need a Service manual for Yamaha Deltabox swingarm 250cc

Your idle circuit in the carb can be clogged. Have you tried to set and adjust the idle? Have you tried running with the choke on a bit. This problem can be due to

• 1) clogged idle circuit in the carb.
• 2) ignition timing
• 3) Vacuum leak at carb to head mount.
• 4) restriction in tank port, or clogged screen in tank valve.

Hope this helps.

could be to much oil in engine,or worn gear shift on inside of engine

well its 20+ years old!!! the engine will need a rebuild by now
the full works too,,,

www.bikepartsonline.co.za

from the left 1 is oil neutral indicatore high beam

Have you trace all wiring condition from end-to-end and everything has been properly grounded?
Get a similar diameter electrical wire, connect one end to bulb and the other to your battery, if it works then try to connect it from battery to switches and from switches to bulb, if substituting old wires works then leave it connected as it is, as one of your wires had its time. No need for wiring diag. If you want try to use Google search engine to search around. Good enough?

@Two things, either out of gas or no spark. Check the fuel, if you have to get it primed, squirt a little gas in the cylinder, if that doesn't fire, you have no spark, pull out a plug and let it rest on a ground, and hit the starter, if there is no spark, your coils are dead, or computer, or ignitor, check it out, Hope this helps.

They are very easy to adjust you will find the adjuster at the rear of the engine my advice to you would be to purchase a workshop manual for the machine it will give you step by step instruction with pictures wich will make the task at hand even easier

It sounds like a fuel starvation problem ,Have you checked the tap on the main tank and see if the fuel is running free .And are your plugs working as they should or have you got a weak spark .

Hi!!
Firstly clean the air filter.
and then the carb too needs cleaning.
You can use a good fuel addative to clean the carbs.
There is a YESI a tube that runs upwards from after the carbarator ... if there is any kind of leak in this you will need to change it immediately..
An advice...Pls dont ty to fix any leak on this using any type of solution, it ALWAYS backfires....
Regards
Berry

Regards
Berry

back the valve adjustment off!! there set too tight

Fuel? Check. Spark? Check. Compression? Check. Spark at the right time? unknown.

Has this machine run while in your possession?

Check the time and get back to me.

sounds like the fuel pump my freind its just under the fuel tank on the fzr,s near the back of the tank sounds like replacement pump will sort it hope his helps

There are a couple of things that could be wrong.
The fuel shutoff valve in the carby could have something under it which stops it from closing.

A problem I had once, I had a souped up bike (250cc) and because I did not upgrade the fuel tap etc I wore holes in the bottom of the floats.

Did you have the carby in pieces?
If you did you might have left the fuel shutoff valve out.

think I have a few of those, flew the *** parts books in and turned them in to microfiche. can't help you if you don't have access to a fiche viewer though.