The best option is to take it to a shop, with them understanding that you do not have any money.
If you pull the body work etc off, any mechanic worth half a shit will be able to pull both cylinders off (leaving the heads on) and inspect the cylinders.
As Whitetrash has said, the most likely cause will be the power valves causing you grief.
HOWEVER....
there is one (easier) POSSIBILITY, the is a CHANCE that the ignition pick up could be faulty, as the symptom you describe is an indication of a sick pick up ( that's the wee black square box that sits outside the flywheel and is respsonsible for telling the ignitor box when the each cylinder is coming up to TDC, so the ignitor box can decide ignition timing for a given RPM
If has been about 8 years or so since I have worked on RGV's, and I currently cannot recal if theta have a twin pick up or single pick up system on an RGV.
If it is a twin system, simply measure the resistance of the pickups when the engine is cold, and remeasure when the engine is hot, the one that changes dramatically is likely your problem.
If it us a single pick up system, it's not the problem.
People often blame coils, but coils is something the Japanese do really well, and even on 20 year old stuff, generally speaking, they last the distance.
When all is said and done, if you only follow one piece of advise ( other than NOT selling Jimmy your bike for 500 handy) then, no matter what the fault is, YOU MUST REMOVE THE POWER VALVES AND SERVICE THEM BEFORE YOU RIDE 1 MORE KILOMETER
In this case you do not even need to remove the cylinders from the machine (unless inspection shows disaster), as they where designed to be servived in place, it is just unfortunate that no one ever actually serviced them when they should ace done.
there will be plenty of information available on how to do this on the net, and I am sure there are pictures as well.
In fact, just ask Whitetrash to come round to your place this Sunday (he brings the beer) and do it for you.
he has nothing better to do
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i dnt want to pull it to far apart myself as i prob wont get it back togeather going haha i really jst want to keep it running to winter then i can park it up and recon... gutted atm its such a nice day and got no bike to ride 
thanx guys
Originally Posted by rgv250
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