Reply To: GT125 Hard to start and little smoke on cold
Yes, check my ebay https://www.ebay.co.uk/usr/evocrest for used parts
Sorry to hear that, but be sure and test compression on both cylinders if you can after the engine is warmed up ?
She is still alive and you still riding but ofcourse a rebuild will make it last longer hopefully since the previous twats clearly have abused the bike by the looks of it.
If you’re adamant for a new piston or rings, email us and tell us if its for front or rear and ill get it locally
Don’t bother with the “hyosung websites” that are blue & white , you will be back next week calling your bank for refund or fraud issues. There is posts about it on this forum anyway.
We still don’t know if its engine pistons or maybe cylinder valve has worn “oil seal” like these
Engine Valve Stem Guide Oil Seal (x4 Seals) – Various Hyosung Models
Because spark plug is directly between the 4 valves also. As soon as valve opens, it is possible a tiny bit of oil goes on the plug causing boggy runs (oily plug hard to spark, so it is stressed to keep sparking your engine)
Your ideas for replacing air filters etc are not a bad idea.
Last thing, when you ride on a private road or somewhere very safe to do so, ride up to 10,000 rpm, then look at mirrors, do you see smoke ?
When bike is hot , rev it to 5,000 when it is standing on idle , and let go of throttle , do you see smoke ?
Open the “FILLER” CAP for the oil on the clutch cover = smell inside , do you smell fuel ? ==> Maybe carb floats and float needs have burst open (replace them) because they may be leaking fuel in to the cylinders => causing piston walls to dry up instead of staying oil coated, so the fuel ends up in the engine crank etc == > Replace oil with motul 7100 and replace oil filter too!