Hello RWhitehosue and thanks for your reply.
It really helps when someone can confirm certain situations based on own experience!
This Saturday will take the bike for another long ride, any problems with cold start or idle and I will pickup Seafoam from local Autozone (they are everywhere LOL), it's just $8.99 per can and I have no Walmart or Target nearby, but it's just $2 difference, I treat it like convenience fee hehe
BTW, I remember Berryman B12 FS cleaner, someone was a fan of it on another automotive forums I used to frequent (toyotanation), just check its pricing on Amazon , but it's like $17
Do you get yours from Walmart's?
Hopefully I won't have to pull the fuel injectors out (did that on 4-cylinder Camry back in a day and sent them for ultrasonic cleaning, I know what difference it makes and I agree with you), but this time I would probably just use the carb cleaner tool you mentioned hehe, thanks for that
As per the fuel pressure problem, that thought crossed my mind too, will keep an eye on it and measure it when all fails and goes to ****, thanks for pointing that out!
Also, just out of curiosity, are you guys pouring regular 87 octane as manual suggests into those bikes?
I read that actually higher octane fuel may cause issues since those Suzuki V-twin engines are made for really low compression ratios like 8:1 or something, so there is no benefit in using anything above 87. I used only 87 on it, but am thinking since the previous owner didn't use the bike frequently, perhaps it was stored for too long (outside) with old fuel in tank and it either picked up moisture or it separated into some crap and now I have those issues that require fuel stabilizer to fix (so it binds all the crap in gas tank back together once again) LOL
Seafoam can help clean cruddy injectors and I have seen it make some pretty substantial improvements to old/neglected engines, but people often tend to think it works miracles (and the prices they charge for it lately, it ought to- that stuff was like $4 a can a few years ago, then a few people made Youtube videos about it and the price shot through the roof. I saw it for $11 a can at autozone the other day (Wally World still has it for I believe $7). Berryman's is still $3 like it's been forever.
Injector cleaning tools are very cheap (ebay/amazon for like $10) that fit on a can of carb cleaner to blast solvent through them, and a battery clip to open them up. They work quite well. Ultrasonic cleaning is best if you have one available, but if not those should take care of it 9 times out of 10.
There's been a couple cases I've seen so far of the fuel pressure regulators going kaput on these, resulting in inconsistent/low fuel pressure which leads to lots of odd problems. Poor idle, low power, spitting/backfiring, ect. The problem on my '05 came and went a few times without much rhyme or reason before it just would barely run at all times, at which point I tested and found it to only have about 15psi of fuel pressure, should be like 45. Replaced the regulator and problem solved. May be worth checking fuel pressure. I could tell the bike was trying to make itself idle, it would hunt around, rev, sputter, recover, but with low pressure it still would idle like crap and either idle very slowly or stall frequently.