Happy New Year folks.

Got photo?

Check here...

I think his engine letop letop, so wanna plug it.

gila ka wanna be my customer? I service carb will charge RM30 liao, dismantle everything, clean pilot/main jet, needle jet, accelerator pump, gasket, chemical rinse and choke jet cleaning... haha. Now I DIY clan my carb, no one does it better.

I don't think you need to bring any paperwork, unless you bought a new bike that comes with a few coupon for free service. Correct me if I am wrong. Other than that, just bring money. Quite likely, they will look at your meter, and suggest take some package. Big bike small bike, all Yamaha bike, they won't ignore you.

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Added on January 4, 2013, 10:05 pmAny of you guys disable the accelerator pumps on the stock LC carb?
Saves fuel consumption during city ride, but engine throttle respond will reduce.

This post has been edited by alexei: Jan 4 2013, 10:05 PM

Initial D fifth stage is available for viewing. I hope I will have time to watch later tonight.

Hey msapi, welcome to the forum, and I certainly appreciate the clarity here.

This post has been edited by alexei: Jan 9 2013, 10:03 AM

-editted-

This post has been edited by alexei: Jan 9 2013, 09:58 AM

-edit-

This post has been edited by alexei: Jan 9 2013, 10:00 AM

@machai: set so low clearance for what?

-edit-

This post has been edited by alexei: Jan 9 2013, 10:01 AM

That's up to him.
To me, that's part of the satisfaction.

@msapi: you're welcome.

welcome, welcome, need to pm the boss...

Maybe can get the manual for Crypton from Indonesia.

Yes, because by lifting the needle, the taper effect starts earlier than normal. So, once you open throttle a bit, the needle jet starts to mix fuel already... My guess the bog is due to slightly rich.

BS carb is pilot screw open more, will make it lean or rich?
Perhaps you need to make pilot jet leaner a bit.

Main jet affects WOT only. Unless you have problem at that throttle position, otherwise don't change it.

If air screw is at the back of the carb, meaning closer to the engine than the air filter box, means it is a fuel jet. Closing it fully, means leanest. Opening it more, is richer. Now, since you already richen the jet needle, it might have affected the idle fuel circuit also, so you can actually open the pilot screw just a little bit less, for idle and off-idle tuning.

So, if stock setting is 1 5/8 turn, then perhaps now you need to close it a bit, to something like 1 1/2 turn, more or less.

For you, either you sandpaper the shim thinner, make sure your 1/4-3/4 throttle performance is good, then tune your pilot screw for idle and off-idle performance.

Nice pics, it seems BS25 is using smooth taper jet needle. For a constant velocity carb, ideally, it should not require needle shim. Only changing pilot and mainjet should be sufficient.

Can you please use spoiler when tagging big photos? I lazy to scroll on my phone... also slow to load. paiseh.

Let me know what jet sizes you are looking for, and what's your budget?
For the jet needle, also let me know what number you want.
I'm not as free to roam around these days, but if I do get a chance I'll ask for it.

If you can, PM me your cell number.

This post has been edited by alexei: Jan 11 2013, 03:43 PM

I think there's 17.5. Then again, there isn't a carb called BS25 by Mikuni, really rare case.
I went to Tokico, but it seems they have really closed shop and moved to main branch. Last time being there, they don't have jets or needles that looks like this.