fuel - i think ok. removed the enjectors and cranked the bike, they sprayed fuel
fire- i think ok . removed the spark plug and cranked while spark plug touching the engine block, they both spark.
air - compression- i will ask an mechanic to test it with compression test tool but i think it is ok too. i also didnt even placed the airfilter and airbox so they cannot be cloged.


i suspect electrical and electronical compenents. Years ago i rebuild the engine and it worked fine but sometimes it used to work on 1 cylinder. according to other user with same problem from korider;
1 - i placed 2nd grounding cable from battery, and 2nd (+) from RR to the directly battery  it solved the problem it began to work fine.
2- but also IAP sensors's connections were loose and realised it also reasons work on 1 cylinder time to time, and renewed the connections, soldered some points.

after these 2 operations it was fine when i leave the bike at the garage at the night, but when i come back morning it wasnt starting( not even on 1 cylinder). So i didnt expect compression gone night to morning without any signal(bad sound etc.) I had to change city for a while  etc.. and i hadnt achived to start the bike once again and sitting for years now.  I really confused and conidering pull out of traffic and selling its parts after a last try.

btw thanks for reply.
 

Thanks for the acceptance in the forum.
Not sure how it work. If I’m wrong help me out please.
I’m on the search for front brake caliper seals for my 650 2014 model. Its 4 piston and two different sizes. Can’t get seals anywhere.
Location in Australia
If anyone can steer me in the right direction it will be gladly appreciated
Regards G

Take a sample to local harware store they would measure the size of it and would give you exact same thing possibly half price

Hello friends,

Just bought new Hyosung Aquila GV250 EFI.
After 100 km only FI lamp comes on. No blinking.  Engine runs normally.
Trying to find how to read error code to check what sensor is responsible for FI light.
Manual say it should blink an error code, but lamp just light constantly.
I could go to the dealer, but don't want to ride 260 km to Dublin with FI light.

Also did not find small coupler under the seat. There is only 4pin coupler not attached to anything there.
Suspect that this is diagnostic port as well, but who knows

Quote from: UNdocab on October 29, 2021, 01:06:25 AM

you have not mentioned the spark plug caps. And they are look like the culprit. Buy  a pair of NGK spark plug caps. OEMs are getting cracked after a while and cause that kind of thing exactly you describe

Where can I order me those? My bike kinda did these things, can't remember exactly since i haven't turned it on for ages, but might as well! I thought it was either the injectors needed cleaning or spark plugs replaced.

Best fit is SV or VStrom 650 spark plug caps. You may buy brand new from suzuki dealer or used one from ebay. The spark plug caps are Denso Tokai(Japan) brand. They are directly fit to 650cc hyosungs
I ve been using them for 8 years without any problem

you have not mentioned the spark plug caps. And they are look like the culprit. Buy  a pair of NGK spark plug caps. OEMs are getting cracked after a while and cause that kind of thing exactly you describe

Where can I order me those? My bike kinda did these things, can't remember exactly since i haven't turned it on for ages, but might as well! I thought it was either the injectors needed cleaning or spark plugs replaced.