Help Hey, need help with my 1997 GSX250f

Dyna coils are about £100 gbp over here..thats about 200 aus $ I think..not cheap but they kick out so much more by way of spark..if your fuel mix is even halfway there then these will make it start..but before investing make 100pc sure the carbs are spot on..procedure as follows:

1) Clean carbs / replace seals as per necessary - check all jets/ needles and replace to factory spec
2) Get a dummy tank (or improvise and make one - easy done with a jerry can and some tubing)
3) Run no in-line filters at this point
4) Check carbs for the obvious - float levels etc and then RE-CHECK

Now the easy bit..

5) Set idle mixture - easy with either a digital rpm meter off the ignition/cdi pick up on the end of the crank, or by ear. By ear go for the highest rpm via adjustment. Or by rpm meter turn pilot screw to obtain maximum rpm and then back off about a 1/8 of a turn. If you have access to vacuum gauges then its possible to get it set pretty much perfect - take the vacuum feed off the inlet rubber on cylinder 2 and connect your vacuum guage to it-set to highest obtainable rpm from a 1700pm base idle speed. This will give you maximum vacuum and correct idle fueling on that cylinder. Then repeat this procedure by transferring the inlet boot to cylinders 1, 3 and 4 - again doing the same- maximum rpm with stable idle. Your idle screws are now at optimum.
6) Balance the carbs.
7) Re check all of the above as its dynamic - one change alters other parameters..
8) When sure and the results are consisitently the same in turns of vacuum pressure, (both at inlet boot- total vacuum/ and at the carb ie for balancing purposes), run the bike a few times and snap open the throttle. Re adjust as necessary. Re -connect inline filter (s) and check its the same.

9) Go for a ride and enjoy

Carbs likely issue as it only happens when cold..pilot screw/choke/idle circuit issue or seal issue (Litetek)..ultrasonically cleaning the carbs will likely resolve the issue with a new set of seals..but the dyna coils will improve the starting no end..and the running and top end once over 6k rpm,

Good luck mate, cheers si

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